ATV_DOWNCONVERTER_FOR_420_TO_450_MHz

Published:2009/6/18 5:02:00 Author:May | From:SeekIC

This ATV downconverter converts the 420- to 450-MHz ATV band, which is several channels be-tow the lower limit of the UHF band, to channel 3 or 4 for viewing on virtually any TV. The down-converter has a low-noise preamplifier stage and a double-balanced passive mixer for good performance and a wide dynamic range. That is necessary with today's crowded UHF bands. The converter draws about 27 milliamperes from a 13.2-volt dc source, so it can be used in portable and mobile applications. An extra IF stage gives an overall gain of about 25 dB. A block diagram of the clownconverter is also shown. A complete kit of parts, including PC board, is available from North Country Radio, P.O. Box 53, Wykagyl Station, New Rochelle, NY 10804-0053A.



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