Jerry,
It's a mistake to confuse the simple "9MHz IF with 5-5.5MHz LO" mixing
scheme with the one used in the Corsair.
In the Corsair we have:
RF = LO - IF for all bands 160m thru 30m, and
RF = LO + IF for the higher bands, if we ignore the 17m anomaly.
The minus sign before the IF for the LF bands causes the sideband inversion.
As I said before, the classic 9MHz IF with 5-5.5MHz LO mixing
arrangement is:
RF = IF - LO for 80m, and
RF = IF + LO for 20m
Those are quite different schemes as far as IF/RF frequency inversion is
concerned.
73,
Steve G3TXQ
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