First of all, I would like to extend a HUGE THANK YOU to everyone who
helped me figure out the problem with my CR-7A cassette deck.

I had made a couple of hasty assumptions, and you folks put me on the
right track.

Now if I could only find a couple of 1-ohm, 1/4-watt fusible
resistors....these things are BLOODY HARD to find!!!!!!!!!!!!

Eeyore wrote:
The filament btw acts as a directly heated cathode in a VFD. The segments that
illuminate are the anodes and the remaining connections are control grids.

It's a big multipin triode.

Umpteenode?

--
One phrase that explains 99% of all idiot driving:
"You can't block traffic if you're not in the way."

"EADGBE" wrote in message
ups.com...

First of all, I would like to extend a HUGE THANK YOU to everyone who
helped me figure out the problem with my CR-7A cassette deck.

I had made a couple of hasty assumptions, and you folks put me on the
right track.

Now if I could only find a couple of 1-ohm, 1/4-watt fusible
resistors....these things are BLOODY HARD to find!!!!!!!!!!!!


Where are you ? If it's really that hard in your locality, I'll bung a
couple in a Jiffy bag for you ! I have a drawer full of 'em ...

Arfa

EADGBE wrote:

Now if I could only find a couple of 1-ohm, 1/4-watt fusible
resistors....these things are BLOODY HARD to find!!!!!!!!!!!!

As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On Sep 29, 7:51 am, (Scott Dorsey) wrote:

As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.

SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.

On Sep 29, 7:32 am, "Arfa Daily" wrote:

Where are you ? If it's really that hard in your locality, I'll bung a
couple in a Jiffy bag for you ! I have a drawer full of 'em ...

ARFA:

I may have to get you to send some to me. They are rare as hen's
teeth around here.

Thanks!

On Sat, 29 Sep 2007 06:46:28 -0700, EADGBE
wrote:

On Sep 29, 7:51 am, (Scott Dorsey) wrote:

As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.

SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.

Radiospares have them. Part No 267-1569

d

--
Pearce Consulting
http://www.pearce.uk.com

"EADGBE" wrote in message
oups.com...
On Sep 29, 7:32 am, "Arfa Daily" wrote:

Where are you ? If it's really that hard in your locality, I'll bung a
couple in a Jiffy bag for you ! I have a drawer full of 'em ...

ARFA:

I may have to get you to send some to me. They are rare as hen's
teeth around here.

Thanks!


Well, if you need me to, just contact me off-group using the same e-mail
address as I use to post. Even if you are the other side of the world to me,
it's only gonna set me back the cost of a coupla stamps to get you out of
trouble, and I guess that I can stand that without going bankrupt ...

Arfa

Don Pearce wrote:

EADGBE wrote:
(Scott Dorsey) wrote:

As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.

SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.

Radiospares have them. Part No 267-1569

They have an absurd minimum order charge.

Graham

On Sat, 29 Sep 2007 21:10:22 +0100, Eeyore
wrote:



Don Pearce wrote:

EADGBE wrote:
(Scott Dorsey) wrote:

As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.

SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.

Radiospares have them. Part No 267-1569

They have an absurd minimum order charge.

Graham

You can always top up with useful stuff - they have plenty.

d

--
Pearce Consulting
http://www.pearce.uk.com

Don Pearce wrote:
On Sat, 29 Sep 2007 21:10:22 +0100, Eeyore
wrote:


Don Pearce wrote:

EADGBE wrote:
(Scott Dorsey) wrote:
As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.
SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.
Radiospares have them. Part No 267-1569
They have an absurd minimum order charge.

Graham

You can always top up with useful stuff - they have plenty.

d


NAh if you do that, you`ll end up with all the crap you ordered to make
up the value, and the resistors will be out of stock!

Ron(UK)

"Ron(UK)" wrote in message
...
Don Pearce wrote:
On Sat, 29 Sep 2007 21:10:22 +0100, Eeyore
wrote:


Don Pearce wrote:

EADGBE wrote:
(Scott Dorsey) wrote:
As I said earlier, MCM electronics stocks them. Other places that
cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may
help
as well. Parts Express MIGHT have them, but they don't carry too
many TV
set parts any more.
SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.
Radiospares have them. Part No 267-1569
They have an absurd minimum order charge.

Graham

You can always top up with useful stuff - they have plenty.

d


NAh if you do that, you`ll end up with all the crap you ordered to make up
the value, and the resistors will be out of stock!

Ron(UK)

Oh Ron, and haven't we all been *there* !! Last time for me just two weeks
ago ...

Arfa

Don Pearce wrote:

Eeyore wrote:
Don Pearce wrote:
EADGBE wrote:
(Scott Dorsey) wrote:

As I said earlier, MCM electronics stocks them. Other places that cater
to the (rapidly dwindling) TV repair crowd like B+D Enterprises may help
as well. Parts Express MIGHT have them, but they don't carry too many TV
set parts any more.

SCOTT:

Thanks, but I have already checked all of those sites, including MCM.
Nobody seems to stock a 1/4-watt, 1-ohm fusing resistor. I may have
overlooked the part in my search results, but I have tried all of
those sites (and others) multiple times.

I can't believe that this part would be this hard to find.

Radiospares have them. Part No 267-1569

They have an absurd minimum order charge.


You can always top up with useful stuff - they have plenty.

What exactly would the OP want to 'top up' with ? He's not a repairman.

Graham

In article .com,
EADGBE wrote:
On Sep 29, 7:32 am, "Arfa Daily" wrote:

Where are you ? If it's really that hard in your locality, I'll bung a
couple in a Jiffy bag for you ! I have a drawer full of 'em ...

ARFA:

I may have to get you to send some to me. They are rare as hen's
teeth around here.

Digi-Key part PPC1.0ATR-ND. That's a 1/3 watt and not a 1/4 watt but should
be fine.

MCM only has half-watt ones, part number 370-1.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Thanks for all the help, folks!

I finally found 1/4-watt, 1-ohm fusible resistors from a supplier in
Europe. They should be in my mailbox in about a week, hopefully.

It's weird that a part that I would have assumed to be fairly common
is so hard to find in the U.S.

Have fusible resistors "gone out of style" in place of something else?

I was pretty sure I could have used a regular flameproof 1-ohm
resistor for this particular circuit, but I was just paranoid enough
to want to be able to use exactly the right part. Why? Well, the
unit in question had undoubtedly been hit with some sort of voltage
surge, causing several other power supply components to fry.

Those other components have been replaced, and the deck's power supply
has been stable so far. However, this latest component failure, in a
very low-voltage circuit that is completely unrelated to the
previously-repaired circuits, shows me that there could be other
weakened components hiding just about anywhere--so I might as well re-
install ALL of the original protective elements and keep a watchful
eye until I am convinced the deck is completely rehabilitated.

"EADGBE" wrote in message
oups.com...
Thanks for all the help, folks!

I finally found 1/4-watt, 1-ohm fusible resistors from a supplier in
Europe. They should be in my mailbox in about a week, hopefully.

It's weird that a part that I would have assumed to be fairly common
is so hard to find in the U.S.

Have fusible resistors "gone out of style" in place of something else?

I was pretty sure I could have used a regular flameproof 1-ohm
resistor for this particular circuit, but I was just paranoid enough
to want to be able to use exactly the right part. Why? Well, the
unit in question had undoubtedly been hit with some sort of voltage
surge, causing several other power supply components to fry.

Those other components have been replaced, and the deck's power supply
has been stable so far. However, this latest component failure, in a
very low-voltage circuit that is completely unrelated to the
previously-repaired circuits, shows me that there could be other
weakened components hiding just about anywhere--so I might as well re-
install ALL of the original protective elements and keep a watchful
eye until I am convinced the deck is completely rehabilitated.


Not a bad philosophy at the end of the day.

Arfa

On Oct 2, 7:32 am, Meat Plow wrote:

I just realized your nickname is the standard tuning of a guitar.

Yep! That's it! :-)

On Oct 2, 2:32 pm, Meat Plow wrote:

So i take it you play?

Oh, yes. My love of playing comes from the same spot as my love of
fine stereo/audio equipment, both analogue and digital.

EADGBE wrote:

Meat Plow wrote:

So i take it you play?

Oh, yes. My love of playing comes from the same spot as my love of
fine stereo/audio equipment, both analogue and digital.

On the subject of the original post, have you tried powering the VFD display and
is it working now ?

Graham

On Oct 2, 6:22 pm, Eeyore
wrote:

On the subject of the original post, have you tried powering the VFD display and
is it working now ?

Graham

GRAHAM:

No, I haven't powered it on yet. I'm still waiting for the
replacement fusible resistors to arrive from my parts source.

I didn't want to use just a regular flameproof resistor, partly
because of my own paranoia and partly because the fusible resistors
are marked as "critical components" in the Nakamichi service manual.

EADGBE wrote:

Eeyore wrote:

On the subject of the original post, have you tried powering the VFD display and
is it working now ?


GRAHAM:

No, I haven't powered it on yet. I'm still waiting for the
replacement fusible resistors to arrive from my parts source.

I didn't want to use just a regular flameproof resistor, partly
because of my own paranoia and partly because the fusible resistors
are marked as "critical components" in the Nakamichi service manual.

They're simply 'covering themselves' when they say that but I won't argue with your
caution.

Graham

Nice guitars! I like the Les Paul Studio flametop.

I could see the small versions of the photos but I couldn't supersize
them. Must be a glitch.

Eeyore wrote:

EADGBE wrote:

Eeyore wrote:
On the subject of the original post, have you tried powering the VFD display and
is it working now ?

GRAHAM:

No, I haven't powered it on yet. I'm still waiting for the
replacement fusible resistors to arrive from my parts source.

I didn't want to use just a regular flameproof resistor, partly
because of my own paranoia and partly because the fusible resistors
are marked as "critical components" in the Nakamichi service manual.

They're simply 'covering themselves' when they say that but I won't argue with your
caution.

Graham


If you were to be supercautious, you should order the absolutely correct
part direct from Naki

Ron(UK)

On Oct 3, 8:58 am, "Ron(UK)" wrote:

If you were to be supercautious, you should order the absolutely correct
part direct from Naki

Ron(UK)

I had always heard that Nak would not sell parts directly to consumers
(a common policy among manufacturers).

And since Nakamichi's decline, I would have been very surprised to
hear that anyone could order anything at all from them.

Do you have ordering information? I would really appreciate it.
Thanks!

EADGBE wrote:
On Oct 3, 8:58 am, "Ron(UK)" wrote:
If you were to be supercautious, you should order the absolutely correct
part direct from Naki

Ron(UK)

I had always heard that Nak would not sell parts directly to consumers
(a common policy among manufacturers).

And since Nakamichi's decline, I would have been very surprised to
hear that anyone could order anything at all from them.

Do you have ordering information? I would really appreciate it.
Thanks!


Well it was meant to be a joke actually, if you read the manual it
generally says that only the manufacturers specified part number should
be used where a crucial safety component is marked.

I`m surprised you had trouble finding 1R fusibles, they are a pretty
common component in a great many items.

I find Rapid Electronics are pretty good for small orders in the UK


Ron(UK)

--
Lune Valley Audio
Public Address Systems
Hire Sales Maintenance
www.lunevalleyaudio.com

On Oct 3, 10:02 am, "Ron(UK)" wrote:

I`m surprised you had trouble finding 1R fusibles, they are a pretty
common component in a great many items.

I find Rapid Electronics are pretty good for small orders in the UK

Ron(UK)

RON:

Whoops! I should have known it was a joke. Sorry about that.

Yes, I did indeed have lots of trouble finding 1R fusibles. But
perseverance paid off!

Thanks for the tip about Rapid Electronics. I'll try to remember
them!

"Arfa Daily" wrote in message
...

"Eeyore" wrote in message
...


EADGBE wrote:

(Scott Dorsey) wrote:

Does an ohmmeter show them as open or not?

SCOTT:

The fuse resistor that didn't blow reads exactly 1.04 ohms (that's an
in-circuit reading).

The fuse resistor that blew reads open circuit....and that is with the
resistor TAKEN OUT of circuit completely.

I figured I could replace the fuse resistor with a regular 1-ohm
resistor and get things working again, but I also realize that that is
NOT safe, and so the deck will not be powered up again until it has a
new 1-ohm fuse resistor in place...and I might even replace the other
1-ohm fuse resistor whilst I'm at it.

I wouldn't excessively fret over not fitting a genuine fusible resistor.
The
only difference between them and normal resistors is that they are (a)
designed
to fail open and (b) are flameproof. There's still another one in circuit
!

If one of those fusibles had failed (as it seems) that's why you have no
display.

Graham


I completely concur. Two fusible R's in a single winding to single
filament circuit such as this appears to be, is an overkill. At least as a
temporary measure, I would have no qualms about subbing a standard 1 ohm
resistor at all, and all the 'usual suspects' that know me on here, would
readily confirm that I *never* advocate *any* practice that is in *any
way* dangerous. By all means fit a genuine replacement in the end if that
makes you feel better, but to try it, just put your pliers across the
failed one ... Honestly, you can !!

Arfa


I'll agree that Arfa never advocates anything that is dangerous. If he says
it is ok you can take his word. I also see no problem doing this either..
You still have one fuse in the line. In your house's wiring there is only
one fuse or circuit breaker in the supply. Using 2 is overkill.

Mike

"Michael Kennedy" wrote in message
. ..

"Arfa Daily" wrote in message
...

"Eeyore" wrote in message
...


EADGBE wrote:

(Scott Dorsey) wrote:

Does an ohmmeter show them as open or not?

SCOTT:

The fuse resistor that didn't blow reads exactly 1.04 ohms (that's an
in-circuit reading).

The fuse resistor that blew reads open circuit....and that is with the
resistor TAKEN OUT of circuit completely.

I figured I could replace the fuse resistor with a regular 1-ohm
resistor and get things working again, but I also realize that that is
NOT safe, and so the deck will not be powered up again until it has a
new 1-ohm fuse resistor in place...and I might even replace the other
1-ohm fuse resistor whilst I'm at it.

I wouldn't excessively fret over not fitting a genuine fusible resistor.
The
only difference between them and normal resistors is that they are (a)
designed
to fail open and (b) are flameproof. There's still another one in
circuit !

If one of those fusibles had failed (as it seems) that's why you have no
display.

Graham


I completely concur. Two fusible R's in a single winding to single
filament circuit such as this appears to be, is an overkill. At least as
a temporary measure, I would have no qualms about subbing a standard 1
ohm resistor at all, and all the 'usual suspects' that know me on here,
would readily confirm that I *never* advocate *any* practice that is in
*any way* dangerous. By all means fit a genuine replacement in the end if
that makes you feel better, but to try it, just put your pliers across
the failed one ... Honestly, you can !!

Arfa


I'll agree that Arfa never advocates anything that is dangerous. If he
says it is ok you can take his word. I also see no problem doing this
either.. You still have one fuse in the line. In your house's wiring there
is only one fuse or circuit breaker in the supply. Using 2 is overkill.

Mike

Thanks Michael. Support appreciated, as always.

Arfa