05-08-2018, 08:58 AM
There are many Sovtek 6L6 tubes, I have their Tung Sols I just bought. Depending on the lettering they will have different plate voltages etc. And they are not cheap.
6L6GC STR matched quad is $90 from Jim and $108 from somewhere else. These have higher plate voltage than regular 6L6G.
In my HF22 the self-bias voltage is -35V (100mA for both tubes across 350 ohm resistor).
If it were for CLASS A amp, I would say be mindful or displacing the working point too much so it will start distorting; for this which is I think AB see if your crossover remains smooth.
Personally I trust the engineers who calculated the working point of the amp.
6L6GC STR matched quad is $90 from Jim and $108 from somewhere else. These have higher plate voltage than regular 6L6G.
In my HF22 the self-bias voltage is -35V (100mA for both tubes across 350 ohm resistor).
If it were for CLASS A amp, I would say be mindful or displacing the working point too much so it will start distorting; for this which is I think AB see if your crossover remains smooth.
Personally I trust the engineers who calculated the working point of the amp.
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