Dear Folks,
This is my first post (so go easy!) - I purchased a 300B amp off EBay and I have really enjoyed it. Previously I built an Edison 30 amp.
However, the 300B has died, my daughter said the "middle bulb went pop". This "bulb" she is referring to is the 274B tube.
My question is...how long should these valves last? And what could cause premature failure.
The amp is the same as this:
http://cgi.ebay.co.uk/King-300B-Clas...QQcmdZViewItem
Regards
Andrew (Yateley, UK)