In Reply to: Where from that hum?? posted by vinnie2 on September 11, 2016 at 14:13:25:
Should have thought of this a long time ago.... I hooked my cd player directly to the new amp (took the preamp out of the picture) and low and behold the hum went much lower. That means I need to dive into my preamp because it isn't as quiet as I thought it was. I have dc on the 26 filaments of the preamp, but I might need to take another look at my filtering for the dc.
At least I know what the main problem is now. I will still have to do a little tweaking on the 845 too, but I will plus up the preamp first. Thanks for all the help folks, I appreciate it.
Edits: 09/14/16
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Follow Ups
- update 5 - vinnie2 05:19:02 09/14/16 (7)
- RE: use a spectrum analyzer ... - deathtube 667 04:01:42 09/15/16 (4)
- RE: use a spectrum analyzer ... - vinnie2 06:06:11 09/15/16 (3)
- RE: use a spectrum analyzer ... - deathtube 667 12:24:05 09/15/16 (0)
- free spectrum analyzer - Tre' 07:29:00 09/15/16 (1)
- RE: free spectrum analyzer - vinnie2 12:36:50 09/15/16 (0)
- RE: update 5 - Tre' 07:41:07 09/14/16 (1)
- RE: update 5 - vinnie2 09:08:56 09/14/16 (0)