Thanks for reading.
I am experiencing strange behavior with this very good power supply that I made around 2015.
Just to recap, the PSU can produce a dual-rail and a single rail upto 1A.
I am feeding it with 21-0-21 ac and obtaining +/-12v and 24,0 as outputs.
Since yesterday, the positive rail of +/-12v is drifting towards 6-7v irrespective of trimmer position. Negative rail and 24,0 output is rock solid.
Where to look to fix this fault? I replaced lm317 and removed all caps in this rail thinking something is leaking but the behavior remains.
Any suggestion/view please let me know
I am experiencing strange behavior with this very good power supply that I made around 2015.
Just to recap, the PSU can produce a dual-rail and a single rail upto 1A.
I am feeding it with 21-0-21 ac and obtaining +/-12v and 24,0 as outputs.
Since yesterday, the positive rail of +/-12v is drifting towards 6-7v irrespective of trimmer position. Negative rail and 24,0 output is rock solid.
Where to look to fix this fault? I replaced lm317 and removed all caps in this rail thinking something is leaking but the behavior remains.
Any suggestion/view please let me know