wrote in message
oups.com...
http://www.getboost.com/dz/sienna.htm
73 de Jim, N2EY
Hello, Jim
Well, how about a kit in the $100.00 range ..... with opposite sideband
rejection in excess of 50 dB. Even a few hundred Hz away from the carrier?
Direct conversion. With selectable sideband. Hmmmm ....
Of course, it is a receiver. They do make an exciter. But the thought of a
phasing direct conversion receiver or phasing transmitter with sideband
suppression of that order is interesting. Especially since the lower audio
frequencies will also be highly suppressed.
I've got the QSTs referenced. All in the 1990s. Of course, they've
replaced the analog audio quadrature generation with DSP to obtain the
increase from 40 to 50+ dB suppression of the unwanted sideband.
Here is a URL:
http://www.wwc.edu/~frohro/R2_DSP/R2-DSP.html
Nothing like DSP.
73 from Rochester, NY
Jim AA2QA