BM Build Pictures

[stelligan]

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

Thanks,
Dave

[ayan]

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

V2 supply 320 VDC. V2A plate 196 V, cathode 1.84 V; V2B plate 203 V, cathode 1.74 V

V1 supply 286 VDC. V1A plate 173 VDC, cathode 1.68 V; V1B plate 179 V, cathode 1.57 V

B- of -47 VDC for 28mA Ip

I think that's about all.

Cheers,

Gil

[pazzo63]

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

[pazzo63]

I M REALLY SORRY!!!YOU ALREADY WROTE THAT IN ADVANCE!!tomorrow i m going to call a doctor for my mind...BEST REGARDS

[tomo]

Ayan,

Could you please let me know?

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.

[ayan]

Ayan,

Could you please let me know?

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.

Gil

[ic-racer]

The black wire you see is the ground of the PI stage, which goes to the SEND jack ground's lug.

Since the V2 cathodes are right there, do you also run them with that PI ground (to the SEND jack, like the diagram I posted)?

[tomo]

Ayan,
I could understand.
Thank you very much.

[ayan]

Since the V2 cathodes are right there, do you also run them with that PI ground (to the SEND jack, like the diagram I posted)?

No.

Gil

[ayan]

Ayan,
I could understand.
Thank you very much.

Welcome, Tomo.

Gil

[Mark]

Dear Gil

That is a beautiful build. HAD himself would be very happy with that!!!

So how many of these amps do you have now?