Hi guys:

Well I went into an antique store last weekend and bought a beautiful clock radio. It is a Bulova model 100, in robins egg blue with gold knobs - very striking. Well, I went to open the cabinet to check the tubes because as usual the unit didn't work and I found - the speaker - missing, shell and all. This is one of those where the back magnet mounts to the chassis with two screws.

Snookered again...

Since this is an All American Five, what is the spkr impedance and do I have a ghost of a chance to find the same type that mounts that way mechanically?

Thanks Again
Lou

Is the audio output transformer present?

If so, a generic 8 ohm voice coil impedance speaker will probably work OK. You will need to cobble a mounting adapter, but that shouldn't be too tough. It's very unlikely that you will find an "drop in replacement" speaker unless you unearth another identical, junked set that could serve as a parts donor. Which may have been how your set lost its speaker in the first place...

Don't feel too bad about the speaker missing...A few years ago I was in an antique store, found a nice radio,in a hurry, plugged it in, didn't play. Figured it was a bad tube, etc...Got it home, all the tubes were missing! My bad...Lesson learned.
AFA replacing your speaker..CV is right, you'll have to improvise it. A little imagination with boneyard parts, brackets, etc. you have laying around, can get it going.

:Don't feel too bad about the speaker missing...A few years ago I was in an antique store, found a nice radio,in a hurry, plugged it in, didn't play. Figured it was a bad tube, etc...Got it home, all the tubes were missing! My bad...Lesson learned.
:AFA replacing your speaker..CV is right, you'll have to improvise it. A little imagination with boneyard parts, brackets, etc. you have laying around, can get it going.
:
Hi Lou, bummer, a cheap 4 or 8 ohm PM should work fine. As for mounting the speaker I've done several using L brackets from Yee Olde Hardware Store mounted to the top of the chassis. Do you have the Audio Output Transformer if not looks like they were 2000 ohms for a 4/8 ohm speaker on the AA5's. Good Luck, George T

::Don't feel too bad about the speaker missing...A few years ago I was in an antique store, found a nice radio,in a hurry, plugged it in, didn't play. Figured it was a bad tube, etc...Got it home, all the tubes were missing! My bad...Lesson learned.
::AFA replacing your speaker..CV is right, you'll have to improvise it. A little imagination with boneyard parts, brackets, etc. you have laying around, can get it going.
::
I have had similar situations (speaker and bracket missing) and have found it easier to make a bracket out of a chunk of wood to fit whatever speaker I could scrounge up to mate with the chassis.
:Hi Lou, bummer, a cheap 4 or 8 ohm PM should work fine. As for mounting the speaker I've done several using L brackets from Yee Olde Hardware Store mounted to the top of the chassis. Do you have the Audio Output Transformer if not looks like they were 2000 ohms for a 4/8 ohm speaker on the AA5's. Good Luck, George T
:

:So anyone got a small PM speaker, say 5 in with the matching transformer attached - perhaps from a junker chassis?

I pulled a picture of the chassis and the speaker is mounted to the chassis with an extra bracket ( square magnet on the speaker with mounting holes ) and the speaker has a matching transformer mounted on top of its' magnet.

Lou

::Don't feel too bad about the speaker missing...A few years ago I was in an antique store, found a nice radio,in a hurry, plugged it in, didn't play. Figured it was a bad tube, etc...Got it home, all the tubes were missing! My bad...Lesson learned.
:::AFA replacing your speaker..CV is right, you'll have to improvise it. A little imagination with boneyard parts, brackets, etc. you have laying around, can get it going.
:::
:I have had similar situations (speaker and bracket missing) and have found it easier to make a bracket out of a chunk of wood to fit whatever speaker I could scrounge up to mate with the chassis.
::Hi Lou, bummer, a cheap 4 or 8 ohm PM should work fine. As for mounting the speaker I've done several using L brackets from Yee Olde Hardware Store mounted to the top of the chassis. Do you have the Audio Output Transformer if not looks like they were 2000 ohms for a 4/8 ohm speaker on the AA5's. Good Luck, George T
::
:
:

If you can post the type number of the audio output tube, that will allow exact impedance matching with a replacement transformer from a supplier.

Not having the audio output transformer in the set is a minor advantage since you won't need to guess what the voice coil impedance was. Just match it to your output tube on the primary side and to whatever new speaker you select on the voice coil side. However, it doesn't matter much with these sets whatever you do, since by the 1950s they were all more or less the same electrically, at least in the audio output stages, and slight mismatches won't make a big difference audio-quality-wise.