I don't have the schematic in front of me and you didn't post it. So I don't know if it's Q5. But that behaves the way you described earlier. Also, make sure you have a passive load for testing, a resistor, or no load, and that your current limit is very low, so that you make sure the circuit works first. Take it easy first, small steps.
After installing 11R in series between the diodes & filter capacitor the voltage remains the same 63V7
You need to attach load & draw some current.
With 170mA current through 11R resistor you will have 1.87V voltage drop.
Thks, I loaded with the 150R 10W, now I have 42.7V after reg., that's OK?
Leds always not shining.
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Now I am tired, so is time to slep, tomorrow morning will do & I let you know.
No, its an overload. Make it 1K.
They will not shine if you will not find what you have wrongly connected and/or burned around the CCS. Tomorrow follow the schematic carefully in comparison, and also check orientation of components one by one. Have a nice rest.
Salas
Is this your dac
I run also pcm63 dac with d1 output stage
at photo seems that you are feeding b1 with dac out signal
but that way we have two buffers ?
what are current right values for Vref bypass cap and out cap of the shunt
Salas, verified LEDs orientation because I changed for a new set, verified Q6, 7 pins orientation changing for two BC546B news.
Result: LEDs don't shine, voltage after reg. is now 42.7V.
Can I replace Q5 2SK170BL for a new one as suggested Iko?
Hai
I don't know about, how this Shunt WoRK
I just use my Eagle, follow Salas Instruction, and TADA! its Works FLAWLESS.
Can you compare your layout with Mine
Its quite easy for me to set the Vout, just a little sliding Vout after Warmed up.
I had try to Decrease to 10ohm/5Watt.
OH NO! to much heat for my Environment with ambient temperature around 33 deg Celcius.
I will put the 22ohm back.
-----------------------------------------------------------------
Almost finish my Lastest Layout (D-1 with Salas Shunt Reg in one board).
PCB is Ready for now.
Have a NICE SLEEP for YOU
Regards
La Ode
I don't know about, how this Shunt WoRK
I just use my Eagle, follow Salas Instruction, and TADA! its Works FLAWLESS.
Can you compare your layout with Mine
An externally hosted image should be here but it was not working when we last tested it.
Its quite easy for me to set the Vout, just a little sliding Vout after Warmed up.
I had try to Decrease to 10ohm/5Watt.
OH NO! to much heat for my Environment with ambient temperature around 33 deg Celcius.
An externally hosted image should be here but it was not working when we last tested it.
I will put the 22ohm back.
-----------------------------------------------------------------
Almost finish my Lastest Layout (D-1 with Salas Shunt Reg in one board).
PCB is Ready for now.
An externally hosted image should be here but it was not working when we last tested it.
Have a NICE SLEEP for YOU
Regards
La Ode
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