guiguite Posted August 10, 2008 Share Posted August 10, 2008 (edited) hi everyone I got a small trouble with my bigblock that will hopefully be easily fixed but i wanted you opinion about it. Last time i tried to play it , it went all fine for like 20 minutes and after that i didn t had any volume at all but a weird hum, a bit like the noise between two radio stations. I checked all the cables, the bass and bladibla, it s all fine. If i put the amp really loud (like 75 % gain and volume) i heard a tiny distorded bit of bass behind the hum and that s all. Is this thing typical of dead preamp tubes? Like when they are cool it s fine but when they warm up, something happen. i hope this is it... otherwise, what could it be ? i opened the amp and checked the valves, they are still lighting up but they are not doing the "ringing" thing when i hit them gently with a pen... i tried again today, and it does the same... 15 minutes and then humming thx in advance. gui Edited August 10, 2008 by guiguite Quote Link to comment Share on other sites More sharing options...
The Burpster Posted August 10, 2008 Share Posted August 10, 2008 Certainly sounds like a tube has let go. Quote Link to comment Share on other sites More sharing options...
guiguite Posted August 10, 2008 Author Share Posted August 10, 2008 thx, i hope it s that... can t really affort to pay for a repair right now :wacko: Quote Link to comment Share on other sites More sharing options...
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