Mesa Stiletto Deuce Head glowing red

[GSVBagpuss]

Hey guys

I'm no expert at all at what makes an amp "go", or more importantly what makes it "stop" (!) so I hope you can give me some guidance?

A friend of mine has a Mesa Boogie Stilleto Deuce head, bought on the bay and played briefly before a valve went which triggered the main fuse to go. Had it looked at by a reputable guitar shop near me and they fixed it up but within 5 mins of playing, a valve started glowing bright red so we turned it off.

Looks like the tube is under biased to me, but what do you guys think?

 

[Platypus]

How did they 'fix it up' ?

Replace the tubes?

It's redplating.. sounds like a bad tube.

 

[AustinK]

if it happened again i would guess that the socket is biased too hot. or it is a bad socket.