Midland 14-623 4 transistor 9v amplifier

[heuermh]

Now for something a little different!

I found this 1960s vintage transistor amplifier and thought it might be fun to convert to guitar usage.




I couldn't find a schematic or manual, but the ad copy says it runs on 9V DC.  I hooked it up to an 8 ohm speaker and then released some magic smoke







I couldn't locate where the smoke was coming from, but note there is a disc capacitor inbetween the transformers




Please let me know if you might have more information on this little amp!

[induction]

If those electrolytics are also from the 60s, I'd start by swapping them all out.

I also see a couple of solder joints near the ground wire that look cold.

Sorry, I don't have any other info or a schematic, but it looks like it should be pretty easy to trace.

[heuermh]

Thanks!  I'll see how far I can get.