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biasing a Musicman amp

6/9/2005 11:53 PM
dave	biasing a Musicman amp l have a Musicman RD2100 100 watt that l want to revalve with 5881wxt valves. The schematic states a minimum voltage of 25mV across the 3.9 ohm resistor in the cathode circuit which gives a tube dissapation of approx. 4 watts. l would normally bias 5881s at 14 watts but l am a bit concerned as the plate voltage is so high, in this case 670 volts. Has anyone had any experience with this ?

6/9/2005 11:53 PM

dave

biasing a Musicman amp

l have a Musicman RD2100 100 watt that l want to revalve with 5881wxt valves. The schematic states a minimum voltage of 25mV across the 3.9 ohm resistor in the cathode circuit which gives a tube dissapation of approx. 4 watts. l would normally bias 5881s at 14 watts but l am a bit concerned as the plate voltage is so high, in this case 670 volts. Has anyone had any experience with this ?

Replies:

Enzo Follow the schematic. These amps a... -- 6/10/2005 9:27 PM