Electronic Schematics (alt.binaries.schematics.electronic) A place to show and share your electronics schematic drawings.

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Default I'm available for projects

I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
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Default I'm available for projects

On 05/12/2016 02:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson

How about writing that book I've been bugging you about?

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
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Default I'm available for projects

On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

On 05/12/2016 02:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson

How about writing that book I've been bugging you about?

Cheers

Phil Hobbs


I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance
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Default I'm available for projects

On 05/12/2016 03:11 PM, Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

On 05/12/2016 02:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson

How about writing that book I've been bugging you about?

Cheers

Phil Hobbs


I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)

...Jim Thompson


Start with some examples, and write them as you go along. I find that
writing or rewriting sections when I'm actually doing the task described
improves them greatly.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
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Default I'm available for projects

Jim Thompson
Wrote in message:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.


In the mid 1980s, Roland had International Rectifier design a
custom chip called the IR3R05 for their analog synthesisers. I
think it was a 14 pin package...it basically consisted of 4 OTA
stages like the Lm13700 configured as a 24 db/octave resonant low
pass filter with inputs for voltage controlled frequency and
resonance, along with a VCA with both linear and exponential
inputs, all on the chip. The 4 filter capacitors were mounted off
chip on the board.

What kind of job would it be to design a chip or maybe a
daughterboard that performed an equivalent function? These chips
often fail in vintage equipment and there seems to be a decent
sized market for replacements that dont require scrounging for
NOS or cannibalizing old units.

--


----Android NewsGroup Reader----
http://usenet.sinaapp.com/


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Default I'm available for projects

On Thu, 12 May 2016 17:12:48 -0400 (EDT), bitrex
wrote:

Jim Thompson
Wrote in message:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


In the mid 1980s, Roland had International Rectifier design a
custom chip called the IR3R05 for their analog synthesisers. I
think it was a 14 pin package...it basically consisted of 4 OTA
stages like the Lm13700 configured as a 24 db/octave resonant low
pass filter with inputs for voltage controlled frequency and
resonance, along with a VCA with both linear and exponential
inputs, all on the chip. The 4 filter capacitors were mounted off
chip on the board.

What kind of job would it be to design a chip or maybe a
daughterboard that performed an equivalent function? These chips
often fail in vintage equipment and there seems to be a decent
sized market for replacements that dont require scrounging for
NOS or cannibalizing old units.


I'm sure I could replicate the chip, but I don't do PCB layout, that's
another skillset altogether.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance
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Jim Thompson
Wrote in message:
On Thu, 12 May 2016 17:12:48 -0400 (EDT), bitrex
wrote:

Jim Thompson
Wrote in message:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


In the mid 1980s, Roland had International Rectifier design a
custom chip called the IR3R05 for their analog synthesisers. I
think it was a 14 pin package...it basically consisted of 4 OTA
stages like the Lm13700 configured as a 24 db/octave resonant low
pass filter with inputs for voltage controlled frequency and
resonance, along with a VCA with both linear and exponential
inputs, all on the chip. The 4 filter capacitors were mounted off
chip on the board.

What kind of job would it be to design a chip or maybe a
daughterboard that performed an equivalent function? These chips
often fail in vintage equipment and there seems to be a decent
sized market for replacements that dont require scrounging for
NOS or cannibalizing old units.


I'm sure I could replicate the chip, but I don't do PCB layout, that's
another skillset altogether.

...Jim Thompson


Good thing I've got that skillset. ; )

I wonder it the required components could be squeezed into a
daughterboard that would fit the space available. Might require
some vertical mounting hack.

--


----Android NewsGroup Reader----
http://usenet.sinaapp.com/
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Default I'm available for projects

On 5/12/2016 2:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson

Jim, go buy a fishing pole.
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Default I'm available for projects

On 05/12/2016 08:42 PM, Tom Biasi wrote:
On 5/12/2016 2:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson

Jim, go buy a fishing pole.


That would rather involve water. Jim lives in the outskirts of Phoenix.

Cheers

Phil Hobbs
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Default I'm available for projects

On 5/12/2016 8:50 PM, Phil Hobbs wrote:
On 05/12/2016 08:42 PM, Tom Biasi wrote:
On 5/12/2016 2:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson

Jim, go buy a fishing pole.


That would rather involve water. Jim lives in the outskirts of Phoenix.

Cheers

Phil Hobbs

He's got time to take a ride. I think you got the gist of my comment.


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Default I'm available for projects

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?


I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)


You have a granddaughter with that circuit lab kit. Eventually you will
explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease did.


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Default I'm available for projects

On Fri, 13 May 2016 09:11:16 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?


I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)


You have a granddaughter with that circuit lab kit. Eventually you will
explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease did.


Grand_son_... 8 years old... the same one who's on the All Star Inline
Hockey Team and was just awarded a trophy for best defensive player of
the whole league ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The touchstone of liberalism is intolerance
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Default I'm available for projects

Jim Thompson wrote:
On Fri, 13 May 2016 09:11:16 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?

I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)


You have a granddaughter with that circuit lab kit. Eventually you
will explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease
did.


Grand_son_... 8 years old... the same one who's on the All Star Inline
Hockey Team and was just awarded a trophy for best defensive player of
the whole league ;-)


Well then just pretend that he's going to be an engineer and not a
goalie.


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Default I'm available for projects

On Mon, 16 May 2016 07:29:45 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Fri, 13 May 2016 09:11:16 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?

I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)

You have a granddaughter with that circuit lab kit. Eventually you
will explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease
did.


Grand_son_... 8 years old... the same one who's on the All Star Inline
Hockey Team and was just awarded a trophy for best defensive player of
the whole league ;-)


Well then just pretend that he's going to be an engineer and not a
goalie.


He's super with math, and loves the circuit lab upgrade I gave him at
Christmas. But he's struggling with reading... a bit of dyslexia...
time to hire a tutor (I would do it, but he needs an authoritarian
type to keep him from deviating from work and controlling the
conversation... he's a charmer... seeks out the girls in the crowd...
and he's only 8 ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Liberalism: Dictatorship By The People Who Think They Know Best
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Jim Thompson wrote:
On Mon, 16 May 2016 07:29:45 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Fri, 13 May 2016 09:11:16 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?

I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it
;-)

You have a granddaughter with that circuit lab kit. Eventually you
will explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease
did.


Grand_son_... 8 years old... the same one who's on the All Star
Inline Hockey Team and was just awarded a trophy for best defensive
player of the whole league ;-)


Well then just pretend that he's going to be an engineer and not a
goalie.


He's super with math, and loves the circuit lab upgrade I gave him at
Christmas. But he's struggling with reading... a bit of dyslexia...
time to hire a tutor (I would do it, but he needs an authoritarian
type to keep him from deviating from work and controlling the
conversation... he's a charmer... seeks out the girls in the crowd...
and he's only 8 ;-)


I first kissed a girl at 7, and was made fun of more for that than for
doing experiments.




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On Mon, 16 May 2016 11:22:24 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Mon, 16 May 2016 07:29:45 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Fri, 13 May 2016 09:11:16 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?

I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it
;-)

You have a granddaughter with that circuit lab kit. Eventually you
will explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease
did.


Grand_son_... 8 years old... the same one who's on the All Star
Inline Hockey Team and was just awarded a trophy for best defensive
player of the whole league ;-)

Well then just pretend that he's going to be an engineer and not a
goalie.


He's super with math, and loves the circuit lab upgrade I gave him at
Christmas. But he's struggling with reading... a bit of dyslexia...
time to hire a tutor (I would do it, but he needs an authoritarian
type to keep him from deviating from work and controlling the
conversation... he's a charmer... seeks out the girls in the crowd...
and he's only 8 ;-)


I first kissed a girl at 7, and was made fun of more for that than for
doing experiments.


Today, you'd be expelled (for either).
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On 5/16/2016 9:22 AM, Jim Thompson wrote:
On Mon, 16 May 2016 07:29:45 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Fri, 13 May 2016 09:11:16 -0400, "Tom Del Rosso"
wrote:

Jim Thompson wrote:
On Thu, 12 May 2016 15:09:45 -0400, Phil Hobbs
wrote:

How about writing that book I've been bugging you about?

I ponder that, but I'm not sure I'd be good at writing... circuit
design is so easy for me I'm not sure I can explain how I do it ;-)

You have a granddaughter with that circuit lab kit. Eventually you
will explain things. Just think about how you will do that.

Or occupy your time by riding a bike over the Himalayas like Pease
did.


Grand_son_... 8 years old... the same one who's on the All Star Inline
Hockey Team and was just awarded a trophy for best defensive player of
the whole league ;-)


Well then just pretend that he's going to be an engineer and not a
goalie.


He's super with math, and loves the circuit lab upgrade I gave him at
Christmas. But he's struggling with reading... a bit of dyslexia...
time to hire a tutor (I would do it, but he needs an authoritarian
type to keep him from deviating from work and controlling the
conversation... he's a charmer... seeks out the girls in the crowd...
and he's only 8 ;-)

...Jim Thompson


Maybe he is gay. At that age, I doubt he is horny.

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Default I'm available for projects

bitrex wrote:

In the mid 1980s, Roland had International Rectifier design a
custom chip called the IR3R05 for their analog synthesisers. I
think it was a 14 pin package...it basically consisted of 4 OTA
stages like the Lm13700 configured as a 24 db/octave resonant low
pass filter with inputs for voltage controlled frequency and
resonance, along with a VCA with both linear and exponential
inputs, all on the chip. The 4 filter capacitors were mounted off
chip on the board.

What kind of job would it be to design a chip or maybe a
daughterboard that performed an equivalent function? These chips
often fail in vintage equipment and there seems to be a decent
sized market for replacements that dont require scrounging for
NOS or cannibalizing old units.


I wonder it the required components could be squeezed into a
daughterboard that would fit the space available. Might require
some vertical mounting hack.


The amps in old Tek scopes also go bad, and there's a market for
replacing them too. I suggested years ago that somebody should make a
DIP module to replace them. Today's standard op-amps could do it I bet.


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On 06/04/2016 09:41 AM, Tom Del Rosso wrote:
bitrex wrote:

In the mid 1980s, Roland had International Rectifier design a
custom chip called the IR3R05 for their analog synthesisers. I
think it was a 14 pin package...it basically consisted of 4 OTA
stages like the Lm13700 configured as a 24 db/octave resonant low
pass filter with inputs for voltage controlled frequency and
resonance, along with a VCA with both linear and exponential
inputs, all on the chip. The 4 filter capacitors were mounted off
chip on the board.

What kind of job would it be to design a chip or maybe a
daughterboard that performed an equivalent function? These chips
often fail in vintage equipment and there seems to be a decent
sized market for replacements that dont require scrounging for
NOS or cannibalizing old units.


I wonder it the required components could be squeezed into a
daughterboard that would fit the space available. Might require
some vertical mounting hack.


The amps in old Tek scopes also go bad, and there's a market for
replacing them too. I suggested years ago that somebody should make a
DIP module to replace them. Today's standard op-amps could do it I bet.



A lot of Tek scopes use weirdly high supply voltages.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
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Default I'm available for projects

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek


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On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek


I don't even remember that ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I'm looking for work... see my website.
  #22   Report Post  
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Posts: 706
Default I'm available for projects

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek


I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek
  #23   Report Post  
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Posts: 2,181
Default I'm available for projects

On Tue, 21 Jun 2016 10:04:15 -0500, amdx wrote:

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek


I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek


I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson
Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I'm looking for work... see my website.
  #24   Report Post  
Posted to sci.electronics.design,sci.electronics.basics,alt.binaries.schematics.electronic
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Posts: 706
Default I'm available for projects

On 6/21/2016 10:45 AM, Jim Thompson wrote:
On Tue, 21 Jun 2016 10:04:15 -0500, amdx wrote:

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek

I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek


I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson
Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson


I did miss that part, or forgot it because I didn't want to spend that
much.
So I take it that's what you bought, and you are happy with it?

Yes the "Fat Man" and "The Lone Ranger" have also played on the Internet
stations I listen to, I'd rather listen to "Fat Man" than
"The Lone Ranger", Gunsmoke would probably be my favorite, but I enjoy
most of the detective stories, Dragnet and Philip Marlowe etc.

Went on a search and found this compressor.
https://www.amazon.com/rolls-SL33B-S...dio+compressor

I'll search a bit more but think I'll buy that one.


Mikek
  #25   Report Post  
Posted to sci.electronics.design,sci.electronics.basics,alt.binaries.schematics.electronic
external usenet poster
 
Posts: 2,181
Default I'm available for projects

On Tue, 21 Jun 2016 12:39:57 -0500, amdx wrote:

On 6/21/2016 10:45 AM, Jim Thompson wrote:
On Tue, 21 Jun 2016 10:04:15 -0500, amdx wrote:

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek

I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek


I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson
Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson


I did miss that part, or forgot it because I didn't want to spend that
much.
So I take it that's what you bought, and you are happy with it?


Yep. Works for radio, but not so well for TV movies which can have
significant pauses between speaking... thus the volume runs up and
down.

One reviewer of your selection comments short attack (good), short
decay (bad).


Yes the "Fat Man" and "The Lone Ranger" have also played on the Internet
stations I listen to, I'd rather listen to "Fat Man" than
"The Lone Ranger", Gunsmoke would probably be my favorite, but I enjoy
most of the detective stories, Dragnet and Philip Marlowe etc.

Went on a search and found this compressor.
https://www.amazon.com/rolls-SL33B-S...dio+compressor

I'll search a bit more but think I'll buy that one.


Mikek


...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I'm looking for work... see my website.


  #26   Report Post  
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Posts: 706
Default I'm available for projects

On 6/21/2016 1:37 PM, Jim Thompson wrote:
On Tue, 21 Jun 2016 12:39:57 -0500, amdx wrote:

On 6/21/2016 10:45 AM, Jim Thompson wrote:
On Tue, 21 Jun 2016 10:04:15 -0500, amdx wrote:

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek

I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek

I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson
Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson


I did miss that part, or forgot it because I didn't want to spend that
much.
So I take it that's what you bought, and you are happy with it?


Yep. Works for radio, but not so well for TV movies which can have
significant pauses between speaking... thus the volume runs up and
down.

One reviewer of your selection comments short attack (good), short
decay (bad).

I noted that, also saw it was the only review like that. If it is
objectionable, I'll return it, if it works reasonably well it can always
be tweaked.
If it wasn't for buying enclosures, variable resistors and connectors,
it would be cheap to build. :-) There is a schematic online, although
someone said it has a few errors.




Yes the "Fat Man" and "The Lone Ranger" have also played on the Internet
stations I listen to, I'd rather listen to "Fat Man" than
"The Lone Ranger", Gunsmoke would probably be my favorite, but I enjoy
most of the detective stories, Dragnet and Philip Marlowe etc.

Went on a search and found this compressor.
https://www.amazon.com/rolls-SL33B-S...dio+compressor

I'll search a bit more but think I'll buy that one.


Mikek


...Jim Thompson


  #27   Report Post  
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external usenet poster
 
Posts: 2,181
Default I'm available for projects

On Tue, 21 Jun 2016 15:32:35 -0500, amdx wrote:

On 6/21/2016 1:37 PM, Jim Thompson wrote:
On Tue, 21 Jun 2016 12:39:57 -0500, amdx wrote:

On 6/21/2016 10:45 AM, Jim Thompson wrote:
On Tue, 21 Jun 2016 10:04:15 -0500, amdx wrote:

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek

I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek

I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson
Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson


I did miss that part, or forgot it because I didn't want to spend that
much.
So I take it that's what you bought, and you are happy with it?


Yep. Works for radio, but not so well for TV movies which can have
significant pauses between speaking... thus the volume runs up and
down.

One reviewer of your selection comments short attack (good), short
decay (bad).

I noted that, also saw it was the only review like that. If it is
objectionable, I'll return it, if it works reasonably well it can always
be tweaked.
If it wasn't for buying enclosures, variable resistors and connectors,
it would be cheap to build. :-) There is a schematic online, although
someone said it has a few errors.




Yes the "Fat Man" and "The Lone Ranger" have also played on the Internet
stations I listen to, I'd rather listen to "Fat Man" than
"The Lone Ranger", Gunsmoke would probably be my favorite, but I enjoy
most of the detective stories, Dragnet and Philip Marlowe etc.

Went on a search and found this compressor.
https://www.amazon.com/rolls-SL33B-S...dio+compressor
I'll search a bit more but think I'll buy that one.


Mikek


...Jim Thompson


I designed a compressor for a hearing aid about 48 years ago...
testing it before I got it working correctly... blew a hole in my left
eardrum :-(

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I'm looking for work... see my website.
  #28   Report Post  
Posted to sci.electronics.design,sci.electronics.basics,alt.binaries.schematics.electronic
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Posts: 706
Default I'm available for projects

On 6/21/2016 5:04 PM, Jim Thompson wrote:
On Tue, 21 Jun 2016 15:32:35 -0500, amdx wrote:

On 6/21/2016 1:37 PM, Jim Thompson wrote:
On Tue, 21 Jun 2016 12:39:57 -0500, amdx wrote:

On 6/21/2016 10:45 AM, Jim Thompson wrote:
On Tue, 21 Jun 2016 10:04:15 -0500, amdx wrote:

On 6/14/2016 7:55 AM, Jim Thompson wrote:
On Tue, 14 Jun 2016 07:42:17 -0500, amdx wrote:

On 5/12/2016 1:51 PM, Jim Thompson wrote:
I sit here bored out of my skull with nothing to do but play Solitaire
until the next project start on July 5 ;-)

I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral
Modeling, but I also do designs using off-the-shelf components.

No project is too small... I've even done one-day designs from
time-to-time.

Drop me an E-mail (*)

(*) Do not include attachments in your first E-mail... An E-mail not
matching an entry in my addressbook and with an attachment drops your
E-mail into a black hole.

...Jim Thompson


Did you complete the audio compressor/limiter you were working on for
a bit?
Mikek

I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question here about it.
I'm interested because I use an FM transmitter to transmit my internet
radio audio around the house/yard. Some internet radio signals have high
volume some have low, and sometimes it's different between programs*.
I'd like to level this, without adjusting the transmitter input level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a level
difference between shows.

Mikek

I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson
Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson


I did miss that part, or forgot it because I didn't want to spend that
much.
So I take it that's what you bought, and you are happy with it?

Yep. Works for radio, but not so well for TV movies which can have
significant pauses between speaking... thus the volume runs up and
down.

One reviewer of your selection comments short attack (good), short
decay (bad).

I noted that, also saw it was the only review like that. If it is
objectionable, I'll return it, if it works reasonably well it can always
be tweaked.
If it wasn't for buying enclosures, variable resistors and connectors,
it would be cheap to build. :-) There is a schematic online, although
someone said it has a few errors.




Yes the "Fat Man" and "The Lone Ranger" have also played on the Internet
stations I listen to, I'd rather listen to "Fat Man" than
"The Lone Ranger", Gunsmoke would probably be my favorite, but I enjoy
most of the detective stories, Dragnet and Philip Marlowe etc.

Went on a search and found this compressor.
https://www.amazon.com/rolls-SL33B-S...dio+compressor
I'll search a bit more but think I'll buy that one.


Mikek

...Jim Thompson


I designed a compressor for a hearing aid about 48 years ago...
testing it before I got it working correctly... blew a hole in my left
eardrum :-(

...Jim Thompson

Bummer about the eardrum!
I reviewed again that negative review on Amazon, she said by adding
10uf to 100uf cap from emitter to collector of Q1 eliminated the raspyness.
Only problem is, as I see it the units has 1 single IC and no
transistors. I wonder if it she has an older or newer unit.
Her review is recent, the published schematic is May 2009.
I think she just may be confused.
Mikek
  #29   Report Post  
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external usenet poster
 
Posts: 706
Default I'm available for projects

On 6/21/2016 8:01 PM, amdx wrote:


Did you complete the audio compressor/limiter you were working
on for
a bit?
Mikek

I don't even remember that ;-)

...Jim Thompson


As I recall it was a personal project, you had ask a question
here about it.
I'm interested because I use an FM transmitter to transmit my
internet
radio audio around the house/yard. Some internet radio signals
have high
volume some have low, and sometimes it's different between
programs*.
I'd like to level this, without adjusting the transmitter input
level
each time I switch internet stations.

Did you ever listen to these radio shows as a youngster?
Gunsmoke, William Conrad voices Matt Dillion, The Six Shooter with
Jimmy Stewart, Dragnet with Jack Webb, Bold Venture staring Humphrey
Bogart and Lauren Bacall, The Adventures of Philip Marlowe,
Our Miss Brooks with Eve Arden, and of course The Shadow?

* I often listen to Old Time Radio Programs, and there can be a
level
difference between shows.

Mikek

I'm much older... I'm of "The Fat Man" and "The Lone Ranger" era.

I guess you missed this part of the compressor thread...

From: Jim Thompson

Newsgroups: sci.electronics.design
Subject: Best Audio Clipping Ind Circuit
Date: Thu, 10 Feb 2011 08:19:18 -0700
Message-ID:
References:
X-Newsreader: Forte Agent 6.00/32.1186

[snip]

Use a compressor instead, like...

http://tinyurl.com/4npqpcl

I use one to level everything out of my Roku Soundbridge before it
goes to my sound system... since streaming feeds on the Internet are
so variable in amplitude.

...Jim Thompson


I did miss that part, or forgot it because I didn't want to spend
that
much.
So I take it that's what you bought, and you are happy with it?

Yep. Works for radio, but not so well for TV movies which can have
significant pauses between speaking... thus the volume runs up and
down.

One reviewer of your selection comments short attack (good), short
decay (bad).

I noted that, also saw it was the only review like that. If it is
objectionable, I'll return it, if it works reasonably well it can always
be tweaked.
If it wasn't for buying enclosures, variable resistors and connectors,
it would be cheap to build. :-) There is a schematic online, although
someone said it has a few errors.




Yes the "Fat Man" and "The Lone Ranger" have also played on the
Internet
stations I listen to, I'd rather listen to "Fat Man" than
"The Lone Ranger", Gunsmoke would probably be my favorite, but I
enjoy
most of the detective stories, Dragnet and Philip Marlowe etc.

Went on a search and found this compressor.
https://www.amazon.com/rolls-SL33B-S...dio+compressor

I'll search a bit more but think I'll buy that one.


Mikek

...Jim Thompson


I designed a compressor for a hearing aid about 48 years ago...
testing it before I got it working correctly... blew a hole in my left
eardrum :-(

...Jim Thompson

Bummer about the eardrum!
I reviewed again that negative review on Amazon, she said by adding
10uf to 100uf cap from emitter to collector of Q1 eliminated the raspyness.
Only problem is, as I see it the units has 1 single IC and no
transistors. I wonder if it she has an older or newer unit.
Her review is recent, the published schematic is May 2009.
I think she just may be confused.
Mikek


I need to apologize to the reviewer.
I received the Rolls SL338 program Limiter.
It has a schematic and shows the unit has been revised from their
original schematic that was posted online. The new schematic has a
couple of optoisolators, and most important, one transistor labeled Q1!
I have it hooked up, but I'm not ready to make any comments yet. I
need to solve some hum and breakthrough problems, possibly caused by the
FM antenna to close to the limiter.
Listening to Dragnet, Jack Webb is advertising Chesterfields. :-)
Also an ad asking for blood donations to get gamma globulin to help
fight polo.
It also had an ad for Fatima cigarettes, that's one I never heard of.
http://graphic-design.tjs-labs.com/s...?id=1174783428



Mikek



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