Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: bankeny on April 18, 2023, 09:06:44 am

Title: Triumph Audio Oscillator - Schematic?
Post by: bankeny on April 18, 2023, 09:06:44 am

I have a really cool looking Triumph Model 220 Audio Oscillator that I'm hoping someone might have a schematic for.


I know enough about tube amps to be dangerous and this one has me scratching my head in a few places.


It has two 6AU6 tubes, two 6AQ5 tubes and a 6X4 rectifier.


Thanks!

Title: Re: Triumph Audio Oscillator - Schematic?
Post by: Lectroid on April 18, 2023, 03:19:53 pm

What was it built to do and what do you want to do with it?  With those tubes it might have the makings of a decent small amp conversion.  How about posting some pictures, top and bottom, might generate some ideas here.

Title: Re: Triumph Audio Oscillator - Schematic?
Post by: bankeny on April 18, 2023, 08:15:24 pm

Small guitar head would be the end goal.


What's confusing me the most is what I think is the output transformer only has 3 wires.  SE with parallel output tubes?


The other small transformer appears to be a choke.


I did hook it up to an 8ohm cab and was able to get a faint sound from it.  (The output is labeled 600ohm)


Photos linked here:
https://photos.app.goo.gl/TXznfFuPXsYmBr1r5


Thanks!

Title: Re: Triumph Audio Oscillator - Schematic?
Post by: sluckey on April 18, 2023, 08:22:42 pm

This is a terrible candidate for conversion to a guitar amp. It's a signal generator. Respect it for what it is.

Title: Re: Triumph Audio Oscillator - Schematic?
Post by: Lectroid on April 19, 2023, 09:58:19 am

Agree. Make a nice bookend.