Hi. On a flea market I found an old tube guitar amp.
It looks profesionally built inside, but the case is homemade. Its not really working, but it would be fun to get it working.
On the front it has this:
3 inputs (?!?!?!?)
Treble pot
Bass pot
Volume pot
? Pot (maybe for reverb. THere is a reverb tank, but no reverb sound
Tremolo depth
Tremolo speed
A 3 way switch with an lightbulb on each side. One green one red. None of them work.
In the middle position i a really low sound, with lots of distortion on it. Which maybe could sound way cool, but its just way low.
In any other position i get sound.
It has these tubes:
2x 12ax7
1x 12au7
1x 6av6
2x 7189a
Im not even sure that the right tubes are in the unit, but since i have some sound, it cant be way off.
There are no labels to tell me what tubes should go where.
I swapped the 2 12ax7s around, but no improvement. I even did the same with the 12au7 and swapped that around, but no improvement.
Maybe the tubes arent even in the right places. Who knows.
What is the difference on the two ouput jacks? One seems to have huge green capacitors (maybe) the other output doesnt have any.
Would love a schematic, but first i have to find out what kind it is:)
Thanks!
This is the amp part only. I dont have a speaker, but plugged in a set of crappy headphones to the speaker output jack and kept the volume WAY low.