OTL Amplifier DIY Project

[Musa Zahid]

Dear All,

I recently got an OTL kit-based tube amplifier I am not able to figure out which tube will be used on power section however pre stage is working with 12ax7. I tried using EL34 on power section, but it was not working it means some other tube will be used. Original pictures are attached. Please share your input.

Regards,
Musa

 

[Lavane]

So I'm guessing no schematic?
You might ask for this thread to be moved to the tube forum.
Someone may recognize this amp, or be able to look at how the power tube socket's are wired and give you an idea of what tube or family of tubes will work. Just plugging EL34's into it could cause some damage to the amp or tubes if the sockets are wired for some other type of tube.
Especially if the pilot is different.

 

[stillspin'n]

6AS7g's maybe but need better pics of the output tube sockets.

 

[Musa Zahid]

yes n

So I'm guessing no schematic?
You might ask for this thread to be moved to the tube forum.
Someone may recognize this amp, or be able to look at how the power tube socket's are wired and give you an idea of what tube or family of tubes will work. Just plugging EL34's into it could cause some damage to the amp or tubes if the sockets are wired for some other type of tube.
Especially if the pilot is differey

 

[Musa Zahid]

i can share more images but right i have no clue regarding its manufacturing

 

[Musa Zahid]

6AS7g's maybe but need better pics of the output tube sockets.

sure will do that