Alex Freed wrote:
Michael J. Mahon wrote:The problem is almost certainly reduced capacitance in the line-side filter.Frankly I doubt it for one reason: the high voltage is present and is steady in the sense that there are no ripples visible on the scope as would be the case with low caps.Thanks anyway for the suggestion.
Interesting! So the line-side supply is fine and stable, but the low voltages are out or regulation? Or in regulation but at too low a set point? (Do they drop much when a load is applied?) Sounds like you have an unusual failure mode. ;-) -michael Parallel computing for 8-bit Apple II's! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it is seriously underused."