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Author Topic: 74 sonic I-40 bias  (Read 2477 times)

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Offline Tele-v

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74 sonic I-40 bias
« on: March 12, 2002, 08:34:00 pm »
Anyone know the bias setting for a 74 sonic I-40?
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Offline Greg Z

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74 sonic I-40 bias
« Reply #1 on: March 12, 2002, 09:34:00 pm »
Factory spec calls for -55v on the grids of the output tubes.
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Greg Z
to thine own sound be true
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