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  1. Arizona Joe

    1971 Super Lead 100W Janky Bias Reading

    So I have a SL 100 on the bench and after going through it I connected my bias meter to the two inside first then, the two outside 6550s. And I'm ony able to adjust the bias from 0 - 25 mA , acording to my chart Sovtek 6550s are 35W and my calculations tell me between 38mA (min) and 54mA (max)...

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