Marshall 6100 Bias Drift
Posted: 07 Jul 2019, 01:28
Hej Guys,
i got a problem on my Marshall 6100LM from '95. I replaced the tubes with 6L6GC-STR and tried to get the bias correct. I measrue with a bias-master. In standby everything is fine i meassure -50V. If I turn on the standby the current is high 47mA and the voltages drops slowly after 15-20 minutes with volume down I read -49V Volts and 58mA. So my bias drifts away. Any suggestions?
i got a problem on my Marshall 6100LM from '95. I replaced the tubes with 6L6GC-STR and tried to get the bias correct. I measrue with a bias-master. In standby everything is fine i meassure -50V. If I turn on the standby the current is high 47mA and the voltages drops slowly after 15-20 minutes with volume down I read -49V Volts and 58mA. So my bias drifts away. Any suggestions?