Dave, I have to qualify a few things: is your amp a Blues Master HRM? If not, i.e. if you have a Skyliner EQ, then my boost approach will not work in your amp.
Gil,
Thanks for the response. I guess this will help in my next build , but my current ongoing is a Skyliner. I'll print these tips for the future
OK, here are the voltages of the BM. I use a TF130 (Magic Parts Fender Twin replacement) and the line voltage was 115 VAC when I took the measurements.
Power Tube Plates: 430 VDC
PI Plate supply 399 VDC. V3A 249 V and V3B 248 V, cathode 40V
FANTASTIC JOB MR AYAN!!are you sure that the power tranny is a tf 135??probably you would mean tf 130, the tf 135 is a output tranny but i could be wrong VERY NICE REALLY GREAT
I can not understand 4 wires from the hole near presence cap.
1. orange: FROM where?, TO send jack?
2. red : FROM where?, TO send jack?
3. yellow: FROM where?, TO where?
4. black : FROM where?, TO send jack gnd?
+B rectifier diode parallel ceramic capacitor.
please let me know brand, type(part number).
I can not understand 4 wires from the hole near presence cap.
1. orange: FROM where?, TO send jack?
2. red : FROM where?, TO send jack?
3. yellow: FROM where?, TO where?
4. black : FROM where?, TO send jack gnd?
+B rectifier diode parallel ceramic capacitor.
please let me know brand, type(part number).
Thank you very much.
There is an anchor point at the board, just like in the real Dumble amps. For HRM amps, with independent masters, a wire from the relay (yellow in my amp) -- which will be connected to either the clean or OD master volume output -- goes to that point. From there, an orange wire connects to the SEND jack. From the RETURN jack, a red wire connects to the input cap of the PI. The black wire you see is the ground of the PI stage, which goes to the SEND jack ground's lug.
The cap is .01uf 1KV, any type will do and I am not sure what the P/N for what I put in that amp is.