Wd kt88.

[bob orbell]

Help !! I need some help please, my WA 88 ( one or the first from Peter C ) has developed a fault, I switch on and begin to play music, after about 2 minute's the left speaker fades slowly away, and remains very quite, there is no crackling, no hum, I have reversed all valves but the problem remains on the left, I have substituted the WA 88 for a Quad 405 and all works good, voltage checks on the bench show as they should, where should I look next ? Bob