Michael,
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I've added more instructions to the spreadsheet.?
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To test D6, the PTT must be pressed, and the tab of Q9 at the line in voltage (12 volts in the spreadsheet case).
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If the banded side of D6 is still less than 5.5 volts, then D6 is bad, or R77 is faulty.
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Start with verifying that Q9 is switching on the 12 volts to the driver stages.
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This is a good test for the clarity of the document.? Thank you for the feedback.
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73
Evan
AC9TU
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