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> 10 fet varactor uhf tuners atv down converters 45MHZ if
10 fet varactor uhf tuners atv down converters 45MHZ if
FET Varactor UHF Tuner - ATV Down Converter - 45MHz IF
Originally manufactured as a television receiver component for TV channels 14 - 83 ( 470 - 890 MHz ). Amateur radio operators discovered that it could be tuned below and above that range to reach the 420 MHz and 900 Mhz amateur radio bands in which some of the hams transmit amateur television. For that purpose; an ordinary television set to channel 2 would display the down converted picture. Other uses: a poor man's spectrum analyzer, as a front end for voice communications reception, or down convert the CATV 59 from Ramsey Cube CCD cameras to view the picture on common TV sets.
Note: The instruction sheet states that RF output is on channel 2 and that IS the tuner offered in this listing. My thoughts on this one is that it might go nicely in front of a 6 meter receiver such as Ramsey FR6 for FM voice communications reception: not just from 420 MHz and 900 MHz amateur radio bands but, also the UHF business band (440-ish?), fire departments (450-ish?), legacy analog cell phones (800-ish?) (don't eavesdrop).
