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Took the Plexi out for it's maiden voyage today. Our lead guitarist has a handwired 50 watt and the other new guitarist has a Bogner Shiva. I play only sparingly as I'm learning, so I mainly play rhythm if at all. We did some comparisons and they sound almost identical. We will be doing some side by sides soon. I jumpered both hi gain channels and was easily doing AC/DC and we also did some Van Halen, Led Zeppelin, and some ZZ Top. Everyone was very impressed. I was very proud Sounded very good on it's own w/o an OD pedal too. I have a custom made OD pedal that I used a few times and it really gets into JCM 800 terittory and beyond if needed. I did make one change to the layout, I wired the TMB's master volume instead of using the "gain" as in the original. Other than that it it stock. I will post clips soon in the appropriate section.

Thanks for all of the help. I hope to do another one again soon for someone else.

Great to hear it stood up well! Clips are always good! Can you tell us more about the change?

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

On the change...I used a 1 meg pot on the master volume and then wired the TMB version volume control using it's resistors/values instead of the Plexis on the channel volume where the Plexi has it wired as a gain control. I wanted it to be as close to my buddies 50 watt with PPIMV and I think the results were spot on. Even the guitarist with the Bogner said he liked it better than his tone. The Bogner is a sweet amp, but voiced different and to get that classic tone, the 18 is right on.

So, basically then, it's almost a TMB 'classic' on that channel. A litle more gain maybe? Did you change the cathode resistor or bypass cap on V2? or was that it?

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

The only resistors I changed was to remove the one 100K resistor where GAIN would have been on the Plexi and then added the 470K on V2 pin 2 like the TMB has.