Hello everybody.
I repair my luxman KIT A501 and share with everyone.
the old pcb is retire becauuse heat and brake,So I made the new one to change it.
It seems good
after I set up parts,I compair with schematic that found something need set in back side.
I use 2SK170 replace to K150 TWIN JFET
All parts done!!
clean up after finish
I repair my luxman KIT A501 and share with everyone.

the old pcb is retire becauuse heat and brake,So I made the new one to change it.

It seems good

after I set up parts,I compair with schematic that found something need set in back side.


I use 2SK170 replace to K150 TWIN JFET

All parts done!!


clean up after finish


Last edited:
Well, that was a lot of work, but it looks very good.
Congratulations for some great work!
-Chris
Congratulations for some great work!
-Chris
Hello hn702906,
Outstanding work!
Visited Taiwan (Keelung) back in Nov. 1978 during my naval service. Very beautiful and nice people.
I hope you continue to enjoy listening to music through your newly built amplifier.
🙂
Outstanding work!
Visited Taiwan (Keelung) back in Nov. 1978 during my naval service. Very beautiful and nice people.
I hope you continue to enjoy listening to music through your newly built amplifier.
🙂
Well, that was a lot of work, but it looks very good.
Congratulations for some great work!
-Chris
Thank you Chris,hope you like my work.
Hello hn702906,
Outstanding work!
Visited Taiwan (Keelung) back in Nov. 1978 during my naval service. Very beautiful and nice people.
I hope you continue to enjoy listening to music through your newly built amplifier.
🙂
Hi Cambe.
I'm glad you like it, also looking forward to your trip to Taiwan.
I use new OMRON MY-4 series relay socket to replace old style connect wire and make sure if relay broken can easy to change.

To switch class A and class AB, use OMRON MY4N-GS relay and connect to power transformer as below:




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