"Tio Pedro" wrote in message
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"Richard Knoppow" wrote in
message
m...
As far as selectable sideband in an SSB adaptor
AFAIK all worked by means of either shifting the signal
to the filter frequency or having two filters. I don't
see how phasing would work in a receiving adaptor. There
were numerous phasing type SSB generator for
transmitting, for instance the one made by Barker and
Williamson who also made 90degree audio phase shifting
networks for use in home made ones. I still have the B&W
adaptor I used in the 1960s. It worked pretty well but
had to be adjusted for any large frequency change. Stable
high performance filters or reasonable cost pretty much
ended the use of phasing type exciters.
In any case, a good performing receiving adaptor
which would work on older receivers, especially tube
receivers, would be welcome. The old Hammarlund and TMC
units are pretty hard to come by and, I suspect,
something modern would outperform them.
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Richard Knoppow
Los Angeles, CA, USA
WB6KBL
The Central Electronic Sideband Slicer used phasing for
SSB reception.
On the other hand, the B&W 370 used the filter method.
Pete
I found the handbook for the CE box on BAMA and will have
a look at what they are doing.
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Richard Knoppow
Los Angeles, CA, USA