Another Mysterious tube thing: amp, Supro-Electro 1247

debterminer

It consists of:
2x radiotron 42's
One 4 pin sylvania mystery tube
with "Sylvania c6" written on it
(i suspect it is a rectifier)
1 Sylvania 6N7G
Amp is called "Supro electric #1247"
and two transformers, one for input(I assume) and another for electricity.
Additionaly it came in a cab which has a transformer
(The output transformer i presume) built onto the speaker.

Some pictures:

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debterminer · Posted: Mon Aug 10, 2015 2:41 pm Post subject:

From some further research, i've been able to determine that this amplifier is from 1936

BobTheDog · Posted: Fri Aug 14, 2015 11:36 am Post subject:

Does it work? Sounds like?

debterminer · Posted: Fri Aug 14, 2015 6:09 pm Post subject:

Im not turning it on until i've finished moving my electronics lab to my new house where i can properly work on it, It appears to ahve all original components(possibly even the tubes) So im not so sure about just turning it on until i know how to test each component in it for a failure that would normally show up as an firey paper capacitor lol. Also dont yet have a proper schematic for it, though i may have one that is roughly identical. Talking to a guy whos an expert on valco/supro amps about it, as i want to get it running, not blow it up XD.

Airlock · Posted: Sat Aug 22, 2015 3:54 pm Post subject:

Do a trace off the power supply: old amps can have iffy design choices that can kill, as can be seen in the attached:

Silvertone.png

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