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RE: an interesting journey

That's how this whole thing got started. I originally tried AC on the 813's and just could not tame the hum with conventional hum pots, etc. I was working with dc next, and a couple of folks mentioned SMPS and the halo units. One thing lead to another, and before you know it I was elbow deep in trying to get a quite 813 heater source. Believe me, I know what a bear the big transmitter tubes are for hum.
I stuck in the 560uf caps this morning, and although they have helped I still have some buzz and hum with the halo units. I will work on it some more and see if I can get it out of there. That is one of the best things about straight dc on the 813 and the 26, no hum at all. So why does dc have a muffling effect? : )


Edits: 12/09/16
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