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#15
May 22nd 08, 08:39 PM
posted to rec.radio.amateur.boatanchors
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WTB slicer or ssb adapter
"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. --- Richard Knoppow Los Angeles, CA, USA WB6KBL What is even neater is if it would be possible to make the entire phasing using passive components. (I suppose it is, but it would have excessive losses?) In one direction it would demodulate only one sideband; while feeding audio back into would in turn generate an SSB signal. IIRC, the math shows the sidebands would be "reversed" between RX and TX functions, however... Pete k1zjh |
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