My amo has evolved quite a bit - kind of a 'living breadboard' of some sort. Started as a TTT inspired 6L6 fixed bias, with normal and overdrive channels, master volume and reverb. One of the first change was to go to cathide-biased 6V6 (like a 5e3 output stage). I can change from 6V6 to 6L6 by switching the transformer impedance setting (8Ohm for 6L6 - original configuration, and 4Ohm - with 8Ohm speaker - for 6V6)
After multiple changes, it has evolved in its the current configuration. The last (and maybe most significant) change has been the addition of a VVR. I got rid of the overdrive channel (which was picking some noise anyway, and the master volume. I like this a lot, as I can set the amp just right and control it from my guitar pickup settings (tele with 4 way switch), volume and tone. This is absolutely great, and I don't even use any pedals (except for the tuner pedal) anymore - I just like 'playing the amp' better.
Here is my main questions for the more experienced amp builders:
However, when overdriven too hard, sometimes it can be just a little 'farty'. I wonder if it is the concertino phase inverter (form I have read about it). Since I have a spare 1/2 tube, since removing the master volume, would it be better to concert it to a long tail phase inverter, like one the deluxe reverb? That would not be too hard to do, but I would like some opinions before doing one more change!
Current configuration:
Preamp with tone stack - one 12AX7
reverb driver 12AT7
Reverb recovery and summing stage: one 12AX7
Phase inverter: one half 12AX7 - (change to 12AT7 and long tail inverter?)
Cathode biased 6V6 PP output stage
Feedback on/off switch
VVR on the output stage
After multiple changes, it has evolved in its the current configuration. The last (and maybe most significant) change has been the addition of a VVR. I got rid of the overdrive channel (which was picking some noise anyway, and the master volume. I like this a lot, as I can set the amp just right and control it from my guitar pickup settings (tele with 4 way switch), volume and tone. This is absolutely great, and I don't even use any pedals (except for the tuner pedal) anymore - I just like 'playing the amp' better.
Here is my main questions for the more experienced amp builders:
However, when overdriven too hard, sometimes it can be just a little 'farty'. I wonder if it is the concertino phase inverter (form I have read about it). Since I have a spare 1/2 tube, since removing the master volume, would it be better to concert it to a long tail phase inverter, like one the deluxe reverb? That would not be too hard to do, but I would like some opinions before doing one more change!
Current configuration:
Preamp with tone stack - one 12AX7
reverb driver 12AT7
Reverb recovery and summing stage: one 12AX7
Phase inverter: one half 12AX7 - (change to 12AT7 and long tail inverter?)
Cathode biased 6V6 PP output stage
Feedback on/off switch
VVR on the output stage
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