Blue glow on tubes

Tubes Asylum

Questions about tubes and gear that glows. FAQ

203.197.24.200

Apologies for the barrage of questions but I am new to the the tube world and every little thing gives me concern.
Yesterday, I noticed that glass cover of all the 4 power tubes were giving a blue glow in some areas. This was not inside the tube but on the glass shell. It was noticed only when the room was dark. The blue colour could not be seen when I put on the lights. Apart from this everything seemed normal in the way the tubes looked and sounded.
Is this normal or is there a problem. The amp is a Cayin A88T with stock tubes.
Thanks for your help.

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

Topic - Blue glow on tubes - afg 21:28:18 08/18/05 (4)

COOL, ain't it? nt - bluelobster 16:40:02 08/19/05 (0)

Re: Blue glow on tubes - Sherlock 21:32:31 08/18/05 (2)

Re: Blue glow on tubes - afg 23:27:53 08/18/05 (1)

Re: Blue glow on tubes - robber 05:23:24 08/20/05 (0)

You can not post to an archived thread.