Fender BF/SF Twin based project

[vampwizzard]

Delivered my 5F6A/JTM45 to one gigging guitarist in Nashville and later that night I went and hung out with another gigging guitarist. He gave me this ugly monstrosity of a half built dumble clone. Almost zero options.. looks like a single channel take on it. My buddy says it worked until he "blew a tube socket". We lugged it to my truck and he told me to make something good with it.

Whoever built this thing did a crappy job all around. Im going to full scrap and start with the iron. Im fairly confident its from an original BF/SF fender twin. This is an old friend from before he started doing well and i want to do him a solid.

That being said. Design options. Ive been through the Rivera mods on the deluxe and it seems that many of them were to fix things the twin naturally fixed. Higher preamp voltage to push the 6L6s better for example. I feel like there's not a lot of help to that circuit that Rivera's mods can help. Am I wrong in that thought?

AB763 wise, has anyone done the mods from Rob's site? Im interested in a swiss army knife build. Something in the D flavor. Looking for opinions between a D style twin and something like tweed-ing it up with Rob's tone stack bypass and/or some sort of tube sag resistor/switch between a tube and the SS.

[MFowler]

I've been doing the SF mods from Rob Robinette's site and the owners love these mods higher gain on one channel, reverb on both if amp has reverb, the 3-way NFB switch on the ground switch in back, for tremolo versions I put in a P/P pot that Rob notes on his site to switch the tremolo in and out for gain boost.
Nice and easy mods.


Mark

[vampwizzard]

Thanks, Mark. really appreciate it. Have you done any of the master volume mods?

[MFowler]

Yes I have done the Lar-Mar PPIMV using a dual gang 250k linear pot, 2m2 safety resistors and two lead shielded cable.


Mark