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

nico3las2003 · 1934

« previous next »
Pages: 1   Go Down

0 Members and 1 Guest are viewing this topic.

Offline nico3las2003

  • Newbie
  • *
    • Posts: 8
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

  • Sr. Member
  • ****
    • Posts: 500
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

  • Hero Member
  • *****
    • Posts: 1167
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

  • Hero Member
  • *****
    • Posts: 1599
  • Not all engineers are civil
Reply #3 on: June 21, 2016, 11:12:07 PM
....and make sure the pins are nice and clean.

M.McCandless

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19766
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

Pages: 1   Go Up
« previous next »