12AU7 tube flash at Cornet2 power up?

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Biff

12AU7 tube flash at Cornet2 power up?
« on: 1 Mar 2011, 11:21 pm »
I have a number of nice 12AU7s and one of them is a long black plate Lansdale (6189). However, it does flash for a brief moment upon powering up. Anything to worry about?

I should add that the tube tests strong in my tester, and no shorts.

Thanks.

mjosef

Re: 12AU7 tube flash at Cornet2 power up?
« Reply #1 on: 2 Mar 2011, 04:58 am »
The initial Flash is normal..nutten' to worry about.

Biff

Re: 12AU7 tube flash at Cornet2 power up?
« Reply #2 on: 2 Mar 2011, 01:46 pm »
Thanks.

Bernie

  • Jr. Member
  • Posts: 24
Re: 12AU7 tube flash at Cornet2 power up?
« Reply #3 on: 2 Mar 2011, 06:05 pm »
It is not uncommon for European tubes to flash somewhat at turn on.

Bernie.

Biff

Re: 12AU7 tube flash at Cornet2 power up?
« Reply #4 on: 2 Mar 2011, 06:30 pm »
I don't think this is a Euro tube. It looks like this one (RCA made perhaps?).