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Phil Kane · December 15th 07, 08:05 AM posted to rec.radio.amateur.moderated

On Thu, 13 Dec 2007 20:27:37 EST, (Mark Kramer)
wrote:

The story I heard is that this started because Collins radios had an IF
of 9MHz and only needed one set of (expensive) sideband filters to have
LSB below 9 and USB above. Mixing to get the final output: F1+F2 gives
same sideband you start with, F1-F2 inverts.

That's what I was told.

The real story is that it was the Central Electronics (CV ??) exciter
that had that scheme.
--

73 de K2ASP - Phil Kane

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon

e-mail: k2asp [at] arrl [dot] net