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Title: Please amp gurus, need help with my OTS 100 Post by: fgurdian on July 17, 2014, 12:09:00 AM I just finished building my OTS 100. While I am nowhere near a tube electronics expert, I have succeded building 5 amps in the past (from plexi clones to twins) and this is my first amp build that deals with channel switching and relay boards. The problem is that while my clean channel works perfectly, when I switch to OD the amp squeals and if i turn up the overdrive control there are repetitive loud bangs happening together with blue flashes in the output tubes. Has anyone experience a similar scenario? Please help me!!!
My voltages are as follows: Tube Type Pin1 Pin3 Pin4 Pin5 Pin6 Pin8 V1 12AX7 174.7 1.85 137.5 2.37 V2 12AX7 182 1.89 156.2 2.24 V3 12AX7 290.3 61.6 280.7 61.6 V4 6L6GC 39.2mV 450 445 -42 447 39.2mV V5 6L6GC 41.6mV 447 445 -42 448 41.6mV V6 6L6GC 40.5mV 450 445 -42 447 40.5mV V7 6L6GC 39mV 447 446 -42 448 39mV HT 350 HT 350 OT CT 450 THANKS IN ADVANCE!!!! |