Hiwatt 50W on Twin Reverb Chasis?

[caesparza]

Hi everybody.

I have a Fender Twin Reverb 65 RI Chasis and Transformers available for a build. I was wondering if I could build a Hiwatt 50W amp on it? Sorry if this looks like a ridiculous question. I know the TR's Transformers put quite high voltage on the circuit that could work on the Hiwatt context.

Thanks in advance for the help.

Stay safe.
Carlos.

[pompeiisneaks]

There are a few things you'd want to check. I found the PT for the Twin RI. It seems to be at 340V output but the classic DR504 were around 350, so you're a little lower on voltages... not the end of the world. The Twin RI is like a 7 preamp tube variant and the hiwatt only uses 4, so you have tons of current capacity available for sure. that may even leave your voltages up a bit higher anyway.

The output transformer would be the area you'd need to sort out. The Hiwatt 50 seems to be a two by EL34 amp but the Twin RI is a 100W no? With 4x6L6GC? You could just use that OT with those tubes and it would likely work, but then you're just reproducing the Hiwatt preamp and you'd have a different power amp. Up to you. OR you could buy an OT that's specced for what a 50W Hiwatt with two EL34's would want.

So, the answer is... it depends.

~Phil

[mhuss]

...or just make a 100 watt one and pull two tubes.

--mark