Princeton reverb

AJS

Can I run my PR with a pair of 6L6s for extra volume?

Also it stays clean pretty well all the way to full power can I change a preamp valve to get a bit more crunchy?

ICBM

AJS said:

Can I run my PR with a pair of 6L6s for extra volume?

No. Firstly it will need a modification to the bias circuit or it will run them too hot, secondly it will stop the tremolo working properly, and thirdly it will actually *reduce* the volume because it will cause an impedance mismatch.

Fitting 6L6s in a Deluxe Reverb is possible because it has a mismatch as stock which the valve swap helps to correct and does actually increase the power slightly, the tremolo is optical not bias, and there's more bias range.

AJS said:

Also it stays clean pretty well all the way to full power can I change a preamp valve to get a bit more crunchy?

No, all you can do is reduce the gain with types other than the 12AX7.

What are you putting through it? A Princeton normally breaks up well before full power.

It sounds like you either need a Deluxe, or even better a Rivera-series Princeton Reverb II.

AJS

a strat

I used to have a PR2 and two DR2s  Unfortunately I had to downsize and they got sold

nero1701

My 68 Ri breaks up just after 4 

noisepolluter

More efficient speaker maybe? Shoehorn a 1x12 in there?

Modulus_Amps

Princeton reverbs have very thin wire in the power transformer and output transformers. 6L6 will kill them unless you bias them cold.