craigh Posted March 30, 2012 Share Posted March 30, 2012 Not sure where to put this. Please move to better forum if needed. I have a RI Princeton Reverb that I picked up as a floor model. To me the trem is weak & I have to have the speed & intensity dialed to 10 to hear any "wobbling". Very different from my '68 Champ. It this normal? Maybe I should replace the tube? Which tube is for the trem? Or replace all tubes? Looking forward to your answers. Thanks. Craig Link to comment Share on other sites More sharing options...
surfpup Posted March 30, 2012 Share Posted March 30, 2012 I'm pretty sure the vibrato circuit uses 1/2 of the phase inverter tube. This is the 12AX7 that is located directly next to the power tubes. Here's a schematic link if that help you... http://ampwares.com/schematics/princeton_rev_gz34_aa1164.pdf Link to comment Share on other sites More sharing options...
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