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#8
May 18th 08, 02:42 AM
posted to rec.radio.amateur.boatanchors
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WTB slicer or ssb adapter
"Tio Pedro" wrote in message ... "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. -- --- 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. -- --- Richard Knoppow Los Angeles, CA, USA |
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