Mods, Please Delete..Duplicate Thread
Posted: Sat Aug 24, 2019 6:22 pm
Picked it up for a steal since it was already modded. Don't know why the previous mod drilled 2 holes in the rear chassis, 1 of which was to install a dedicated ground lug for a simple cathode mod on V1b.
I wanted to take advantage of the existing holes and make it as versatile as possible.
The basis of the mod was the Cameron Atomica, but with a proper punch control true to Cameron and not the Friedman implementation. I installed a 3 way gain voicing on the V1B cathodes similar to the CCV. Installed a 3 way clipping switch. The Pinch control is push pull. Pull adds bottom and is a hard wired setting. In pull, the rotation of the pot is disabled. I did this because that setting is based on the Bogner XTC 'loose' excursion setting and it is a sweet spot for the low and medium gain tones. With clipping of and the switches adjusted, can get close to some XTC chewy blue channel tones. Much of the XTC voicing comes from the NFB circuit. I also added a metro loop that I mod to be better suited for the lower levels post tone stack of Jose modded master volumes. The Roccaforte has a low plate voltage, so I spent alot of time A/B'ing and tweaking to compensate for the lower voltages.





I wanted to take advantage of the existing holes and make it as versatile as possible.
The basis of the mod was the Cameron Atomica, but with a proper punch control true to Cameron and not the Friedman implementation. I installed a 3 way gain voicing on the V1B cathodes similar to the CCV. Installed a 3 way clipping switch. The Pinch control is push pull. Pull adds bottom and is a hard wired setting. In pull, the rotation of the pot is disabled. I did this because that setting is based on the Bogner XTC 'loose' excursion setting and it is a sweet spot for the low and medium gain tones. With clipping of and the switches adjusted, can get close to some XTC chewy blue channel tones. Much of the XTC voicing comes from the NFB circuit. I also added a metro loop that I mod to be better suited for the lower levels post tone stack of Jose modded master volumes. The Roccaforte has a low plate voltage, so I spent alot of time A/B'ing and tweaking to compensate for the lower voltages.




