In Reply to: traces at last.... posted by vinnie2 on October 24, 2016 at 06:12:38:
I'd suggest clip leading RCA shell, negative side of speaker connection, power cord ground, and the ground lead of probe all together. You need them to all be at the same potential. Do all of this with the amp off.
With a RCA shorting plug in place I don't think you will see so much.....partly depending on if it is a push pull or SET amp.
If I'm looking to measure ripple voltage I do it at the power supply caps. AC coupling only....auto trigger works okay to start with.
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Follow Ups
- RE: Does the speaker side of the transformer have the negative lead grounded? - Russ57 19:27:47 10/24/16 (2)
- RE: Does the speaker side of the transformer have the negative lead grounded? - vinnie2 06:04:14 10/25/16 (0)
- RE: Does the speaker side of the transformer have the negative lead grounded? - vinnie2 03:25:38 10/25/16 (0)