Faint humming sound constantly in background

Happy Ghost · 1379

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Offline Happy Ghost

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on: May 19, 2019, 07:15:51 PM
Hi All,

I've a interesting situation here. I've got my Crack + SB combo up and running for a few months now. Then I contracted a bad case of the good ol' tube rolling disease :) So I was trying a bunch of tubes in place of the stock 6080 tube. With every tube I tried, the background has been constantly dead quiet except when I use the RCA 6AS7G one. Then I hear a constant background humming sound even with no RCA connected and volume knob turned all the way down. Is it a quirk of the RCA tube or perhaps I got a bum tube? Any idea?

Thanks,
Atul

Atul

Offline Doc B.

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Reply #1 on: May 20, 2019, 04:20:32 AM
It's that individual tube. A good RCA would be just as quiet as any other 6AS7/6080.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline oguinn

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Reply #2 on: May 20, 2019, 04:47:56 AM
Agreed. I rolled in an RCA 6AS7G just last week and it's dead quiet.

Jameson O'Guinn

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Main System: Schiit Bifrost MB, Rega Planar 6 with Exact cartridge, Eros 2, BeePre, Kaiju/Stereomour II, Jagers, Mainline

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