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October 19th 04, 06:05 AM

Mike Knudsen

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In article ,
(Michael Black) writes:

Whether or not narrow deviation FM was a good replacement for regular
AM, SSB came along at about the same time and won out.

National was pushing NBFM in that era, and the HRO-60 had a chassis socket for
a plug-in NBFM detector, and the front panel mode switch had a labeled position
for it.

Not suprisingly, the HRO-60 that I had for a hwile, the previous owner had
homebrewed an SSB product detector module into that socket! And even
Dymo-labeled the knob skirt over the "NBFM" with "SSB" just so he wouldn't
forget!

The Drake R8 family includes NBFM detection. I actually heard some on 10m not
too long ago. NBFM is simple to generate and lets you use Class C finals, as
others have ppointed out. But the S/N ration of FM goes up with increased BW,
so narrow BW must not perofrm well. And it's less handy than SSB for "netting"
a group of hams who try to all talk at once.
73, Mike K. AA1UK

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