Dear Mr. Mile,
- Is Sr200 required to wear a special regulator (adjustment regulator) as post # earlier.
- For the B500 I just use a simple diode bridge power supply with 4 pairs of Elco, transformer 47.5Vac or + / - 67Vdc supply.
- Can be used the above power supply for kit SR200? because it is too complicated for me to make a special relgulator. sorry my bad english
Best regards,
Yassud
- Is Sr200 required to wear a special regulator (adjustment regulator) as post # earlier.
- For the B500 I just use a simple diode bridge power supply with 4 pairs of Elco, transformer 47.5Vac or + / - 67Vdc supply.
- Can be used the above power supply for kit SR200? because it is too complicated for me to make a special relgulator. sorry my bad english
Best regards,
Yassud
Thank you for quick response and I am sure this is a great power and eager to immediately create a PCB with a layout that is available in this thread.
Regards,
100 volt caps?
This circuit has 63 volt caps. I think 100 Volt is needed (like you changed in the original) ?
You are right, of course. I'm currently building an SR200 PSU and reacted on impulse just before thinking
Hello Mile,
I am thinking of replacing LF411 on SR200 with OPA627. What difference will it make to the Sound of SR200.
I am thinking of replacing LF411 on SR200 with OPA627. What difference will it make to the Sound of SR200.
Nice work, BF421 must be hot, but you can replace BF421 with resistor like in SR200.
Regards
Ok, all BF420/421 must be hot 12mA x U rail is about 600mW per BF. Replace R16 and R17, use 2k2 instead 3k3 for 6mA thru BFs or 2k7 for 8mA and temperature of BFs will decrease.
What is PSU rail voltage for your SR50?
It's OK VAS work in class A, all BFs must be hot without input signal and output load, and you can measure voltages on 100R resistor (about 1,2V for 12mA) and measure offset on amp out (about 1mV) if not something is wrong.