fanbrain Posted September 22, 2007 Share Posted September 22, 2007 I have a Jolida 302b tube amp with JJ KT77's. I was just listening to organ music at moderate level (although it was at full organ and quite bass-heavy) when I looked up and one of them was glowing far more than the others (although still orange). The glowing decreased in intensity when I ran up to the amp and turned it down. I then switched the amp off to avoid any potential damage. These tubes are relatively new to me and probably have a couple hundred hours on them. I bias the tubes every 4-5 months. Any thoughts? Quote Link to comment Share on other sites More sharing options...
Tarheel Posted September 22, 2007 Share Posted September 22, 2007 I am using the same tubes in my Quicksilver Audio amps and have had no problems. You might talk to Doug at dougstubes.com who reccommended that tube to me as a replacement for some el-34s. Go to his site for a telephone number and give him a call. Quote Link to comment Share on other sites More sharing options...
paully Posted September 22, 2007 Share Posted September 22, 2007 is simply to swap it to another position, preferably on the other channel. If the glow follows the tube you've got a bad tube. If the other tube glows in the socket where the tube is now glowing it is the amp and trouble shooting begins. Quote Link to comment Share on other sites More sharing options...
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