What would I need to change in a tweed Bassman 4x10 clone to get it down to Deluxe volumes? 6V6 power tubes and a Deluxe size output transformer, power transformer?
The BBRI OT has an 8k primary, which is a good match for 6V6, whereas the Bassman 5F6A has an OT with a ~4k primary, which is on the low side for 6V6 (though may not be an issue, especially for JJ).I just did a direct swap of JJ 6V6S into a Marshall Bluesbreaker Reissue (similar circuit to a Bassman)
A tweed Deluxe circuit has almost no clean, that's why I want a Bassman circuit. And sorry, but I had a Blues Jr, did all the mods to it, and I just don't like EL84s, I like 6V6s.Two thoughts: A tweed Deluxe (5E3) or a modded Blues Junior.
Both are 15 watts, both break up easily at tolerable volume. The 5E3 has its idiosyncrasies--the interactive volume controls and the decidedly tweed tone control, plus some extra natural compression from the cathode-biased 6V6s. It breaks up at reasonably low levels, certainly a lot faster than the Bassman.
With proper modifications, the Blues Junior can be a pretty decent baby Bassman. It has the same two stages of gain before the tone stack. There's an unused 12AX7 stage that converts to a cathode follower very easily. Once you add the cathode follower, the Blues Junior schematic looks just like a single-channel Bassman, except for some coupling cap and resistor values. The TMB tone stack is easily modified with a couple of capacitor swaps (or just change the slope resistor) to operate like the Bassman stack. A presence control is likewise a very easy addition. You can stick with the EL84s or do a socket conversion to 6V6s with no other changes.
The voltages are low, so the amp is a little saggy, easy to break up, even without a tube rectifier. The master volume is your friend. You can back off to conversational level and still get sustaining distortion from the preamp, or just good, guitar-driven crunch.
I'll grant you that 4x10 moves air differently than other setups, but you could use either amp to drive your Bassman's speakers. Or, for the sake of quiet and ease of use, just live with the difference in tone and sound stage.
Not to pick nits, but I completely disagree with this. Some of my favorite cleans are those from a 5E3. I record clean tones out of my 5E3 all the time. Just roll the guitar's volume back a bit and don't jumper the channels and maybe use a 5751 instead of 12ax7 in V1.A tweed Deluxe circuit has almost no clean