@martinmanning.
Quick question about your bias supply—
Do you have 2 separate 47u caps? I was a bit confused by your annotated schematic. I can see that the original cap is rerouted to the top of where the 10k is.
I tried putting this on 2 different deluxes, one the new build, and another on my early 70’s. I have a gz34 on the new build, and a 5u4gb, so pretty big difference in voltages.
With your bias resistor values, was getting way too much current at my lowest on bias pot. On my 70’s, I had to go back to a 470r, then reduce the 10k down to 1.5k. I also cut the connection from bias high to wiper, as I had so little range, I was worried I might not be able to adjust with new tubes.
I’m going to have to fix the bias on my kids amp in the field, so going to try a similar move to get the current down on that amp as well.
Deluxe Reverb replica build
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- martin manning
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