big cables for small pcb holes.
Dave, Rush,
thanks a lot for your answer. Dave, also thank you for the pics!!
Since I have no other solution, this is exactly, what I have done several times before - not as beautiful as you - and it does not really satisfy my lets say - aesthetics. If there is no better solution and this is what all guys are doing here, I'll try to make ist as beautiful as you did.
Btw, interesting resistor composition
Cheers, Ernst
Dave, Rush,
thanks a lot for your answer. Dave, also thank you for the pics!!
Since I have no other solution, this is exactly, what I have done several times before - not as beautiful as you - and it does not really satisfy my lets say - aesthetics. If there is no better solution and this is what all guys are doing here, I'll try to make ist as beautiful as you did.
Btw, interesting resistor composition
Cheers, Ernst
You can see more details of the resistors in post #2630 in the Sony VFET Amplifier Part 2 thread:
https://www.diyaudio.com/forums/pass-labs/276711-sony-vfet-amplifier-2-a-53.html#post4975031
The fat ones are RN65E.
I don't like having to clip the litz wires either, but tight routing and a little heatshrink makes the wiring easier on the eyes
https://www.diyaudio.com/forums/pass-labs/276711-sony-vfet-amplifier-2-a-53.html#post4975031
The fat ones are RN65E.
I don't like having to clip the litz wires either, but tight routing and a little heatshrink makes the wiring easier on the eyes
I’ve started to power up the front end. All semiconductors/ no VFETs.
Reading some strange voltages. Bench psu at 28v
G- T6. 14.16. G- T8. -13.38
G- T4. -12.87. G- T2. 13.59
T6-T7 0. T8-T9. 0
T6-T11 -12.89. T8-T13 12.84
G- T18. 7mv. G-T15. -0.526
G -T14. 1.25. G-T20 -10.61
G-T19. 11.24. G-T-16. 9.30
G- T17. -8.7
Reading some strange voltages. Bench psu at 28v
G- T6. 14.16. G- T8. -13.38
G- T4. -12.87. G- T2. 13.59
T6-T7 0. T8-T9. 0
T6-T11 -12.89. T8-T13 12.84
G- T18. 7mv. G-T15. -0.526
G -T14. 1.25. G-T20 -10.61
G-T19. 11.24. G-T-16. 9.30
G- T17. -8.7
The Psu is measuring + 14 - 13 .
Is that with it connected or not connected to the board?
If it is +28 -28 unconnected and +14 -13 connected then the board is probably drawing too much current. I don't know what the current draw is for the front end but I would think that it should only in the region of tens of milliamps.
You probably shouldn't try another power supply until you figure out why you are getting these readings. You don't want to inadvertently toast some parts.
with cheap - usually means unreliable - PSU , you're risking great damage, when dealing with circuit having rare parts
deal with that first , then proceed with testing
think of final money value of amp , you'll see that investment in proper testing equipment is clever ........ also count on fact that once you started with building , it's logical that you'll proceed
deal with that first , then proceed with testing
think of final money value of amp , you'll see that investment in proper testing equipment is clever ........ also count on fact that once you started with building , it's logical that you'll proceed
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