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Help identifying vintage tube microphones

Hello guys!
I'm from the small country of Bulgaria and I need help from experts like you with identifying 2 vintage tube microphones that I've acquired recently.
Bought them cheap for $13 each. I believe these are Tesla made since there was a 3rd different microphone in the lot and its box has the same ornaments and finish as the ones I am interested about. I've disassembled both and they both have 5703WA miniature tube inside.
I am attaching pictures below.
Thanks in advance!
Attached files

Comments

Davedog Fri, 03/05/2021 - 19:44
Well now. Here ya go. Here's a great link to vintage mics everyone should have : coutant.org

Within their pages is a large set of links to various collections, engineers, manufacturers etc. And in these links I found THIS

Czechoslovakian Microphone Museum Inside of this I found Tesla AMC 500 and the power supply. Now this mic is the transistor version of those tube mics. There's another called the Tesla AMC 412 which is a tube mic very similar.

This is the page you mentioned. And I don't know if you had been able to see the mics and the paper work on them.

Both of these examples are just a little off but definitely the parentage of your mics.
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