New tube has a humming sound (Winged "C" 6H13C)

nico3las2003 · 1935

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Offline nico3las2003

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on: June 21, 2016, 07:52:37 AM
Hey all, I just purchased a Winged "C" 6H13C for my bottlehead crack, but it has a humming sound that does not go away at low volume or high volume. I know the issue lies with this tube because my other tubes are dead quiet with my amp.
Is this normal?


Offline Tom-s

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Reply #1 on: June 21, 2016, 09:26:30 AM
Common problem with NOS tubes. Contact the seller for another.
I've got a box full of "musical" and thus unusable NOS tubes.
On another note. Some new production tubes (PSVANE 12au7) die fast too IME.


Offline JamieMcC

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Reply #2 on: June 21, 2016, 10:03:33 PM
On occasion I have found some NOS tubes can be a little noisy you could try leaving it running for a day or two, the noise might disappear with a bit of prolonged use.

Shoot for the moon if you miss you will still be amongst the stars!

Offline mcandmar

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Reply #3 on: June 21, 2016, 11:12:07 PM
....and make sure the pins are nice and clean.

M.McCandless

Offline Paul Birkeland

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Reply #4 on: June 27, 2016, 05:48:35 PM
Let that tube run in the amp for 50 hours, just to be sure it doesn't settle down with some use.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

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