audio-talk

Thanks for the replies! I had thought of installing a thermistor but I wanted to keep the amp original and avoid installing something that would get very hot. There's not much room where the mains connector comes in. I used thermionic rectifiers in my own amp with a choke input filter to avoid that ...

Thanks for the reply! I'm in Australia so a long way from any British people with experience of these amps. I did manage to repair it without a manual, it helped that it's really two separate mono amps only sharing a common power transformer. That made comparing the two channels a useful strategy. T...

Hi all, I have been asked to repair a BB100 with a dead channel Before I start however it's obvious someone has installed the wrong valves in the preamp section. Instead of 4 ECC81s and 2 ECC82s there is only one ECC81 and the rest are ECC82s. There are no labels on the amp itself to indicate what t...

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 ...