10-30-2017, 04:54 PM
Well, the tremolo stopped working this evening. I changed the intensity pot (1meg, linear) and I lost the tremolo effect. I don't think it has anything to do with the pot change because it checks out. I thought I found a short yesterday, but apparently not. The footswitch grounds pin 6 (not pin 5 as stated in the previous message) of the 6SL7 through a 2K resistor. I will continue to search. I have two resistors that indicate 41k each on the 6SN7 tremolo tube, but they measure 52k and 72k. They are in series and provide a different voltage drop for each of the plates on 6SN7. I have ordered new resistors and another pot for the tremolo speed. I am still on the upslope of the learning curve for tube amps.
Larry
Larry