Hi Leo
Put on without limiter bulb.
Took away q9070, cr901and cr903.
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On Tue, Jun 30, 2020, 12:31 PM satbeginner <castellcorunas@...> wrote:
Hello Saroj,
the high pitch sound should indicate it is trying to oscillate and turn on
the FET.
The one you have should be OK too.
The thing is, the inrush current of these switch mode PS is very high, so
it could be the bulb preventing it to switch on properly...
If you don't find any obvious shorts around the FET and other transistor,
I would try it without the bulb...
Connect a voltmeter to the expected 43V and see what happens :-)
Good luck,
Leo
