I'm building my first amp,a jcm800 2203 by following the manual metroamp 100w master volume, with zero loss fx and sir34(also metroamp schematic) . I'm using 6550 power tube but I have a question on the bias. 6550 EH are 42w tubes and the plate voltage is 480v , now following the rule of manual metroamp:
(42x0.7) / 480 = 58mA, is ok this value or I'm wrong something?
Sorry but is my first amp
Some photo, work in progress
Advice about the work are accepted
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