Is the oscillator voltage holding up on the higher bands? *Check the
self-generated oscillator tube grid bias voltage with a high-
impedance, low capacitance probe to a VTVM or DMM on DC volts range.
Compare measurement to that on the lower bands.
Cheers,
Roger
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That is a good suggestion. I ended up putting a 6SB7Y in the local
oscillator position in my SX-28 to get reliable operation on band 6
(21-43 Mc.). It doesn't hurt to use a 6SB7Y in the mixer position
either. Even with that, the sensitivity on band 6 is not up to the
lower bands. --Ed