Firstly Happy New Year all. 
I have a WEM Clubman Mk8 opened up at the moment. It's working, and looks all original. A bit of hum and pot crackle to clear up. I'm checking the various voltages and checking the bias. The old Mullard EL84 seems to be set at about 150% dissipation! The voltages read seem to be as per the schematic and the resistance values seem OK. I've heard that Class A EL84 amp are often run hot. Is this correct for a WEM?
Cathode bias amp, 130 Ohm cathode bias resistor, 8V across, 300V plate voltage = 58mA = 18W !!
Any experience info appreciated.
Ben
I have a WEM Clubman Mk8 opened up at the moment. It's working, and looks all original. A bit of hum and pot crackle to clear up. I'm checking the various voltages and checking the bias. The old Mullard EL84 seems to be set at about 150% dissipation! The voltages read seem to be as per the schematic and the resistance values seem OK. I've heard that Class A EL84 amp are often run hot. Is this correct for a WEM?
Cathode bias amp, 130 Ohm cathode bias resistor, 8V across, 300V plate voltage = 58mA = 18W !!
Any experience info appreciated.
Ben
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