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any one can help?? thx again !!~

after the amp sleep half year more~~ i test this amp again, i remove the fuse on power tube (ex v3 power) the red plate is gone, even in stand by mode and play mode~ any expert can suggest me which parts should be exchange or check in the amp?? thx so much !! ~

anyone can help??

Dear All: I have a Randall MTS Lyncc box 100w head used long time, but have some problem happen recently, my amp now have red Plating on 4 power tubes, firsty i change all 4 tube to new 6l6 set, but the problem still happen. some point i see the amp and information i can offer 1)led bias...