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Is there a history of Hammarlund receivers?
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March 13th 04, 05:19 AM
Mike Knudsen
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In article ,
(Michael Black) writes:
The Q-Multiplier will not do a thing for image rejection.
Not per se, but it will notch out a het from an image signal just as well as
from a legitimate passband QRM signal. Although image heterodynes do tend to
drift around a lot, making them harder to keep notched out.
FWIW, my HQ-160 has a Q-multiplier that works only to peak desired signals, not
notch out QRM. The passive slot filter does that (same as on the 170/180,
which do not have Q-mults). Maybe the 150 is different.
Anyway, a peaking Q-mult is perfect for CW and nice for SSB, but not much good
for AM.
--Mike K.
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