![]() ![]() Head Cab Make your head cab a little heavier but a lot more Reverb Dwell Control Mod Add more reverb control. Preamp & Phase Inverter Voltage An excellent mod for amps upgraded Two identical tone stacks? Mod one of them. The tone stack and boost gain for a very tweedy tone. Use this late-in-the-circuit tone control to tame ice pick and tweak your tone. Pentode/Triode Switch Cut power tube output for lower volume In External Box External box goes between your amp and speaker to dump I loveĭump 3/4 of the amp output for lower volumeġ0% Power Switch Dump 90% of the amp output for true bedroom level outputġ0% Power Jack Use your Aux jack as a 10% output jack Mod Master volume AND late-in-the-circuit tone control. Trainwreck Type-2 or simple Type-3 PPIMV master volume. Something constructive with your unused Normal channel. ![]() Mod Apply reverb and tremolo to both channels the way Fender did Silverface Amp Make your silverface amp sound right )īias Balance circuit to Adjustable Bias + Bias Balance It's veryĬhannel Reverb Mod The preferred way to apply reverb and tremolo to both channels and This extra size allowed two 8" Fender Special ![]() My very cool Fender AA270 silverface Bandmaster Reverb.įender made the head cab extra large to allow for distance between the power Is also a great place to mod away with to make that channel interesting and Mods that allow me to go back to the amp's original circuit and tone. "blackface" these amps for a full generational regression. The silverface amps are surprisingly similar to the covetedįender blackface line of amps so many blackface mods and tweaks apply to the Princeton, Princeton Reverb, Champ, Vibro Champ, Showman and Vibrolux Reverb. The "1069" in the model name comes from the circuit change dateĭeluxe Reverb, Twin Reverb, Super Reverb, Pro, Bandmaster Reverb, Bassman, 'AA1069' was Fender's internal model designation for the 1969Ĭircuit. Use just one hand when working on a powered amp. Lethal shock can run between your arms through your heart. Never touch theĪmplifier chassis with one hand while probing with the other hand because a High voltage then have an amp technician service your amp. If you have not been trained to work with Tube amplifier chassis contains lethal high voltage even when unplugged-sometimes If you don't have a planned schematic to build to, it's too hard for anyone to speculate at what you 'might' be able to do with it.Have comments or corrections? Email rob at: robinette at ![]() The 'right' thing to do is to swap out the power transformer and output transformer for a setup for 6V6's which seems like a travesty to an old blackface.Īs for the other mods, I don't know how to respond usually without looking at a suggested schematic. Then you may need to adjust the bias circuit to give the right plate current for 6V6's. Also the 6V6 tends to like lower plate voltages, say 300VDC and the 6L6's are often closer to 600V. (this will vary on plate voltage of course, but that's the general ballpark) do it will make the 6V6's not be in their optimal range. 6L6GC's want about 5600 ohms impedance and 6V6 want about 8000 at that same range. also changing output 6L6 into a 6V6 to go with it.įirst off the output transformer is designed to have an impedance for 6L6's and 6V6's need completely different impedance. I recently bought a fender blackface as a repair project of mine, it is now fixed and running, but since it has a tremolo channel which really I do not like, was thinking of modding it, without gutting a lot of its inside, to a Trainwreck topology by adding one half of the tremolo section tube. This is my very first post although I have joined this forum for some time. ![]()
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