Hi all,
I am an engineer and audio and valve enthusiast in Melbourne Australia. I have built several amplifiers over the years and love the sound and look of valves. I have been asked to repair a Bill Beard BB100 that had lost one channel. It has been "got at" by someone before me and the preamp section has some wrong valves installed. From what I have found on the net it should have two ECC81 and one ECC82 per channel but there actually 5 ECC82s and only one ECC81 installed. There's no labelling on the amp itself. Can anyone help me with information about what valves should go where?
Thanks,
Moss