I have quite a nice portable tranny that has a dead loudspeaker - the magnet has fallen off and try as I may I cannot get it to align to give a passable performance.

I can get a possible replacement off Ebay but does anyone know if the measurement given is the total diameter - ie across the metalwork - or just the diameter of the diaphragm?

Thanks
Rob

On 02/07/16 20:53, Rob Graham wrote:
I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to
give a passable performance.

That is an art ;-)


I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork -
or just the diameter of the diaphragm?

Usually the total,


Thanks Rob



--
All political activity makes complete sense once the proposition that
all government is basically a self-legalising protection racket, is
fully understood.

On Sat, 02 Jul 2016 12:53:09 -0700, Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to give
a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Afair, it's the overall diameter, e.g. 3 inch, 4 inch etc.

--
Johnny B Good

On 03/07/2016 01:00, Johnny B Good wrote:
On Sat, 02 Jul 2016 12:53:09 -0700, Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to give
a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Afair, it's the overall diameter, e.g. 3 inch, 4 inch etc.

Do they quote fixings centres?

Bill

On Sat, 2 Jul 2016 12:53:09 -0700 (PDT), Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker

If you got a live one (s)he'd be self-propelling and not nees a loudspeaker
;-)
--
Peter.
The gods will stay away
whilst religions hold sway

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Rob Graham wrote in
:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to
give a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Thanks
Rob

And then there are electrical properties.

On Sunday, July 3, 2016 at 8:19:41 AM UTC+1, PeterC wrote:
On Sat, 2 Jul 2016 12:53:09 -0700 (PDT), Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker

If you got a live one (s)he'd be self-propelling and not nees a loudspeaker
;-)
--
Peter.
The gods will stay away
whilst religions hold sway


Eh ???

That had to be looked up to see what the current meaning is !!! That's the trouble with being ancient (grandchildren definition!)

Rob

On 03/07/16 03:16, Bill Wright wrote:
On 03/07/2016 01:00, Johnny B Good wrote:
On Sat, 02 Jul 2016 12:53:09 -0700, Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to give
a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Afair, it's the overall diameter, e.g. 3 inch, 4 inch etc.

Do they quote fixings centres?


Only on detailed technical specs

Bill


--
The theory of Communism may be summed up in one sentence: Abolish all
private property.

Karl Marx

On 03/07/16 09:32, DerbyBorn wrote:
Rob Graham wrote in
:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to
give a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Thanks
Rob

And then there are electrical properties.

almost all small ones are 4 ohms


--
The theory of Communism may be summed up in one sentence: Abolish all
private property.

Karl Marx

On Sun, 03 Jul 2016 03:16:05 +0100, Bill Wright wrote:

On 03/07/2016 01:00, Johnny B Good wrote:
On Sat, 02 Jul 2016 12:53:09 -0700, Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to
give a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Afair, it's the overall diameter, e.g. 3 inch, 4 inch etc.

Do they quote fixings centres?

Never afair. Typically, there'd be four screw holes around the rim which
seemed to conform to whatever unnamed standard was in use (if you
replaced an existing 3 inch speaker with another 3 inch unit of any make,
it would simply work as a "drop-in-replacement" with no need to fettle
the fixings).

--
Johnny B Good

On Sun, 03 Jul 2016 02:56:18 -0700, Rob Graham wrote:

On Sunday, July 3, 2016 at 8:19:41 AM UTC+1, PeterC wrote:
On Sat, 2 Jul 2016 12:53:09 -0700 (PDT), Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker

If you got a live one (s)he'd be self-propelling and not nees a
loudspeaker ;-)
--
Peter.
The gods will stay away whilst religions hold sway


Eh ???

That had to be looked up to see what the current meaning is !!! That's
the trouble with being ancient (grandchildren definition!)


TBH, that just suggests you've simply led a sheltered or unadventurous
life these past two decades. :-)

I'm also ancient enough to be blessed with grandchildren but my reaction
to that transexual reference was in the nature of a groan at a very bad
pun (a one out of ten for effort :-).


--
Johnny B Good

On Sun, 03 Jul 2016 08:32:55 +0000, DerbyBorn wrote:

Rob Graham wrote in
:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to give
a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Thanks Rob

And then there are electrical properties.

Typically 8 or 4 ohm voice coils (8 ohms being the more prevalent
standard for the "Tranny Radios" of the day). A simple ohms measurement
(assuming the VC hasn't been damaged so badly as to have short circuited
turns) will reveal the VC impedance (e.g. 7.5 to 7.8 ohms for an "8 Ohm
drive unit").

--
Johnny B Good

On 03/07/16 19:21, Johnny B Good wrote:
On Sun, 03 Jul 2016 08:32:55 +0000, DerbyBorn wrote:

Rob Graham wrote in
:

I have quite a nice portable tranny that has a dead loudspeaker - the
magnet has fallen off and try as I may I cannot get it to align to give
a passable performance.

I can get a possible replacement off Ebay but does anyone know if the
measurement given is the total diameter - ie across the metalwork - or
just the diameter of the diaphragm?

Thanks Rob

And then there are electrical properties.

Typically 8 or 4 ohm voice coils (8 ohms being the more prevalent
standard for the "Tranny Radios" of the day). A simple ohms measurement
(assuming the VC hasn't been damaged so badly as to have short circuited
turns) will reveal the VC impedance (e.g. 7.5 to 7.8 ohms for an "8 Ohm
drive unit").

more 6 ohms fir an 8 ohms niminal


--
"When one man dies it's a tragedy. When thousands die it's statistics."

Josef Stalin

On Sun, 03 Jul 2016 18:12:30 GMT, Johnny B Good wrote:

On Sun, 03 Jul 2016 02:56:18 -0700, Rob Graham wrote:

On Sunday, July 3, 2016 at 8:19:41 AM UTC+1, PeterC wrote:
On Sat, 2 Jul 2016 12:53:09 -0700 (PDT), Rob Graham wrote:

I have quite a nice portable tranny that has a dead loudspeaker

If you got a live one (s)he'd be self-propelling and not nees a
loudspeaker ;-)
--
Peter.
The gods will stay away whilst religions hold sway

Eh ???

That had to be looked up to see what the current meaning is !!! That's
the trouble with being ancient (grandchildren definition!)


TBH, that just suggests you've simply led a sheltered or unadventurous
life these past two decades. :-)

I'm also ancient enough to be blessed with grandchildren but my reaction
to that transexual reference was in the nature of a groan at a very bad
pun (a one out of ten for effort :-).

My humble thanks, oh generous one!
--
Peter.
The gods will stay away
whilst religions hold sway

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