Hi All!
I'm trying to find a good speaker for a Philco Model 48-200 radio, I've searched endlessly with no luck, its a 4" PM with the rectangular back Magnet Base, does anyone have one or know of where I can get one?
Mark

Hi Mark

Here is a list of available speakers:

http://www.oldradioparts.com/2a32fl.txt

Norm

:Hi All!
: I'm trying to find a good speaker for a Philco Model 48-200 radio, I've searched endlessly with no luck, its a 4" PM with the rectangular back Magnet Base, does anyone have one or know of where I can get one?
:Mark

:Hi Mark
:
: Here is a list of available speakers:
:
:http://www.oldradioparts.com/2a32fl.txt
:
:Norm
:
::Hi All!
:: I'm trying to find a good speaker for a Philco Model 48-200 radio, I've searched endlessly with no luck, its a 4" PM with the rectangular back Magnet Base, does anyone have one or know of where I can get one?
::Mark
HI Norm
Thanks dor the info, I looked there, but did not see the Philco numbered speaker I need, and without seeing any photos of the other speakers, its next too impossible too know if any of the others might work, the original number on the speaker I have is a philco # 36-1614, the only other number on there is 252730, and on the speaker element it has the number 0409-016, at this point I don't see getting a replacement, unless these number mean anything too you.
Mark

Mark if it is a PM speaker any PM speaker should work OK, if it is a electrodyamic speaker you can still use a PM to replace it as long as you sub a resistor for the field coil preferably a 5 or 10 watt should do it.
Elton
:Hi All!
: I'm trying to find a good speaker for a Philco Model 48-200 radio, I've searched endlessly with no luck, its a 4" PM with the rectangular back Magnet Base, does anyone have one or know of where I can get one?
:Mark

:Mark if it is a PM speaker any PM speaker should work OK, if it is a electrodyamic speaker you can still use a PM to replace it as long as you sub a resistor for the field coil preferably a 5 or 10 watt should do it.
:Elton
::Hi All!
:: I'm trying to find a good speaker for a Philco Model 48-200 radio, I've searched endlessly with no luck, its a 4" PM with the rectangular back Magnet Base, does anyone have one or know of where I can get one?
::Mark
Hi Elton
Yes I would agree with the fact that as long as it was a PM speaker it would work electrically, the problem is mounting too the chassis, the original one has a rectangular framework covering the magnet and is used too mount too a bracket on the chassis, if I could find a PM speaker with the described mounting on the back then it would definitely work, thats the problem I can't find one that has this on the back.
Mark

Have you condsidered fixing the speaker ou have?
What is wrong with it? Does it still work but the cone is ripped or badly damaged? You can replace the cone with a new one by cutting away all the old cone except a small quarter sized area down near the center. Then past that onto a whole new cone. I've done this with wonderful success many times.
( by the way Mark... just a helpful pointer..perhaps it's just a typo... but you seem to use the word "too" whenever you mean "to" or "two"... and it's very confusing trying to read that way.)

:Have you condsidered fixing the speaker ou have?
:What is wrong with it? Does it still work but the cone is ripped or badly damaged? You can replace the cone with a new one by cutting away all the old cone except a small quarter sized area down near the center. Then past that onto a whole new cone. I've done this with wonderful success many times.
:( by the way Mark... just a helpful pointer..perhaps it's just a typo... but you seem to use the word "too" whenever you mean "to" or "two"... and it's very confusing trying to read that way.)
Hi
Well I give up, I've searched endlessly for a replacement speaker for this Philco 48-200 radio with no luck, I can not find anything that I would be able to mount on this chassis that would work, if anybody has any ideas or has a 4" full range speaker out of a vintage radio I would be willing to pay for it.
Mark

Mark... can this one be repaired?.. is it just torn or what's wrong with it?

:Mark... can this one be repaired?.. is it just torn or what's wrong with it?
:Hi
The voice coil is open, unless there is a way to replace the entire speaker cone and voice coil there is no way to fix it.
Mark

Oh ok.. wel yes the voice coil can be replaced ... i've done it... the problem is finding it and getting the exact correct size and payong the price of $18-20. The one I replaced was with an entire cone and voice coil from another speaker.
Now that could be your solution.
The reason I did it was because I wanted to keep the dynamic speaker for the fact that it was part of the power supply... And if you have a special mount you want to keep you can do the same.
... so I found another old PM speaker and removed the whole cone and voice coil and put it right in the dynamic speaker's frame. Just careful soldering to the voice coil wires thats all.

:Oh ok.. wel yes the voice coil can be replaced ... i've done it... the problem is finding it and getting the exact correct size and payong the price of $18-20. The one I replaced was with an entire cone and voice coil from another speaker.
:Now that could be your solution.
:The reason I did it was because I wanted to keep the dynamic speaker for the fact that it was part of the power supply... And if you have a special mount you want to keep you can do the same.
:... so I found another old PM speaker and removed the whole cone and voice coil and put it right in the dynamic speaker's frame. Just careful soldering to the voice coil wires thats all.
Hi Peter
Well it sounds easy enough the way you describe it, but how do you get the fabric that connects to the voice coil out without damaging it, honestly this is way behond my capabiblities, I would be afraid of ruining everything.
Mark

Well i'm no master at this .. but I have done a few.
Not all speakers are built exactly the same... but
on the ones I did the voice coil and cone are all together as one piece.. perhaps the voice coil was glued to the cone.
anyway.. the voice coil is on a small cylinder or sleeve that slides up and down in the magnetic groove.
It is attched by two wires coiming out of the paper that go up to the transfoemer.
I unsoldered those at the frame leaving them long enough to resolder to the the frame you are puting into.

Peter,
Your idea of finding an equivalent cone/voice coil combo is meritorious, but not without its own faults.
#1 What impedance is the old voice coil?
#2 Will the new voice coil match the driving impedance of the output transformer secondary?
#3 What about speaker shims to align the voice coil in the gap.
#4 What style spyder does it have, and can it be readily removed/reglued/reattached?
#5 How is the cone attached at the outer edge of the frame, or what style of edge suspension is there?

And finally as you mentioned, soldering the voice coil leads to the flexible leads behind the cone. The very astute and meticulous can rewind a voice coil, but not without great difficulty.

marv

:Oh ok.. wel yes the voice coil can be replaced ... i've done it... the problem is finding it and getting the exact correct size and payong the price of $18-20. The one I replaced was with an entire cone and voice coil from another speaker.
:Now that could be your solution.
:The reason I did it was because I wanted to keep the dynamic speaker for the fact that it was part of the power supply... And if you have a special mount you want to keep you can do the same.
:... so I found another old PM speaker and removed the whole cone and voice coil and put it right in the dynamic speaker's frame. Just careful soldering to the voice coil wires thats all.

Marv: I don't often throw caution to the wind... but...
He who hesitates is often very safe.. but never experiences the joy of adventure!!
lol
The two speakes I worked with did not have spiders.. so that was'nt a problem.
Most speakers from this era are 3.2 ohms and these both were.
I was prepared to shim it with a couple of pieces of 35mm film from some old negatives as have worked well for me in the past.
But I played the radio while re-gluing so I could help hear any problems with the voice coil rubbing ..and I was able to actually position it without much problem... but gingerly... lol
The two outer edges were the same diameter and had the paper edge glued to the metal frame and held on over that with a heavier cardbard ring.. I used a razor knife under the edge and they came up but I was real careful..
But what could I loose?... I already had 1 shot speaker and the replacement was one I bout for $5...
Go for it!!!

Peter,
My hat is tipped to your success, but throwing caution to the wind on 19th century technology is not advised, if one is to retain any semblance of the original or its operation, and in the case of these old timer radios, just making them work would not be my utmost concern. I don't believe I've ever observed a speaker without a spyder of some sort, although your observation may be a first for me. As for the 3.2 ohm quotation, my last rebuild of a 1929 Edison had a 16 ohm voice coil, but still intact. I only replaced the cone. On that rebuild, I saved every rusty screw, nut washer etc, and reused them. Now I have a renewed original as good or bad as it came from its factory.

marv

:Marv: I don't often throw caution to the wind... but...
:He who hesitates is often very safe.. but never experiences the joy of adventure!!
:lol
:The two speakes I worked with did not have spiders.. so that was'nt a problem.
:Most speakers from this era are 3.2 ohms and these both were.
:I was prepared to shim it with a couple of pieces of 35mm film from some old negatives as have worked well for me in the past.
:But I played the radio while re-gluing so I could help hear any problems with the voice coil rubbing ..and I was able to actually position it without much problem... but gingerly... lol
:The two outer edges were the same diameter and had the paper edge glued to the metal frame and held on over that with a heavier cardbard ring.. I used a razor knife under the edge and they came up but I was real careful..
:But what could I loose?... I already had 1 shot speaker and the replacement was one I bout for $5...
:Go for it!!!
:

Marv:
19th century???
I was talking 20th... lol

referring to 1930 - 1949 radios