| :hi. ok four 6v6 tubes plus two 10 watt amps. ok i have two 10 watt arkay amps that take 6v6 output tubes. this is a push pull output on these. one amp has a tube line up of one each. 12ax7 12au7 12at7 two 6v6. other is one of each 6sc7 6sL7 6sk7. two 6v6 tubes. in one amp the 6v6 tubes are noisey . these four tubes [6v6] are the same name type. switch them over to the other amp and no noise. same with the other amp noise is gone. very strange. thank you paul : Wiggle and twist the tubes in their sockets. Could be bad socket connection or poor solder joint to tube lead wire inside socket pin. I have seen this numerous times with 6V6 GT tubes. Different amp / tube pin combinations put pressure in different places on pins and sockets - and also on resistors and capacitors wired with stiff wire to tube sockets. However what you describe is not at all unusual. A tube that is noisy might be quiet in a similar circuit because different bias puts the tube at a different operating point in relation to voltages and currents. EdM IPAddress: ***.108.130.11 |
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| Warren | |
| Dale | |
| paul | |
| Dale | |
| John Kogel | |
| paul |
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