Source for replacement caps in H744 regulators

Matt Burke matt at
Fri Jan 7 03:22:24 CST 2022

On 07/01/2022 02:39, Jon Elson via cctalk wrote:
> Yes, the 2nd unit is running at 5 KHz, clearly explaining the noise. 
> Possibly there is a bad flyback diode, or something causing the
> different waveform.

That would be D5 I guess? I did do some checks in this area but I can't
remember if I swapped that particular part with the other unit. I did a
DC test out of circuit using the bench supply and it seemed to work with
no leakage in the reverse direction. Perhaps it only fails when running
at full speed?



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