Quote:
Originally Posted by N2IXK
What is the amplitude of that ringing on the 240V line? What is the DC voltage?
Can you try temporarily bridging another cap between 240V line and ground to see if it improves the bars or cuts the amplitude of that ringing?
Post the section of the schematic that shows C270 and this supply for those of without a Sams handy...
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You'll have to forgive my lack of knowledge. I'm learning how to use the scope as I go along. All I can tell you is it was 5 volts/div with 10x probe and 20us time/div. How can I get the amplitude of the ringing? Do I increase decrease the volts/div and use the vertical scale just on the ringing portion?
As for the cap, I know I need one over 240V, but is there a particular value I should use? Also, should I parallel it with the current one or can I just find a 240V source and put the cap on it to ground?
I've attached the section of the schematics with the C270 a 10uf 300V. The T207 is the Flyback.
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