v1 flashes at power up?

[ampmike]

Hey Guys,My express is done and Ive been making a head cab these last few days I noticed when I turn on the power V1 kinda lights up and then goes back to a normal glow.Like a flash!As soon as you hit the power switch after the amp is cooled down it does that,Anything I should be concered about?The preamps are all nos mullards,Thanx Mikey

[Richie]

Its normal for some tubes. mostly Euro tubes. Some of those have a seem across the top.

[PlinytheWelder]

Mullards flash like that. It's kind of disconcerting if you've never seen it before.

After a while it becomes kind of comforting...

[solderstain]

The original Made-in-Holland Amperex Bugle Boys do that too. Those are my fave tubes in V2 of a non-MV Marshall and in the Top Boost section of an AC30.

[paulster]

It usually means you've got a very nice tube!

[azatplayer]

The original Made-in-Holland Amperex Bugle Boys do that too. Those are my fave tubes in V2 of a non-MV Marshall and in the Top Boost section of an AC30.

Got a bugle boy in V1 on my express, loving it!