Sparkly E188cc

[vetmed]

I have a good idea what happened but I will ask anyway... On powerup this evening I was treated to quite the little fireworks display inside the E188cc bottle, white and blue flashes for a few seconds until I shut it down. A replacement Russian 6n23p worked perfectly and after several hours of playtime there seems to be no lasting ill effects I've never noticed this before so it is possible that I've simply not noticed it until now I think this type of tube doesn't like the DC coupling And not many hours on it and pretty pricey to boot. Anyway if anyone has any thoughts on this I'd love to hear.

Regards to all
 PS site looks great

[Paul Birkeland]

Some of the crustier 6922's in my stash have exhibited this behavior at times in the Eros and other similar circuits, but I have yet to have any of my "nicer" tubes behave like this.

If the tube in question is new, you might want to chat with the vendor a little bit. 

[vetmed]

Well its not new but was sold as new unmarked old military stock. Judging by the construction, and going on what little I know about such things, it appears to be Mullard construction, with 4 seams at the top. Between 200 and 300 hours use at most. I bought 2 at the time, the other remains unused. Guess I will try the online vendor and see what he has to say. Thanks

[johnsonad]

I've had Mullards do this without any ill effect. There was a thead in the tube asylum a while back with others with the same experience.

[vetmed]

Thanks Aaron, I'll have a look at that discussion

Cheers