
r-390a.net
The R-390A Frequently Asked Questions PageThe R-390A Frequently Asked Questions Page. Welcome to the R-390A Frequently Asked Questions (FAQ) Page. The R-390A/URR radio receiver is arguably the best performing high-frequency (HF) receiver of the tube era. Its sensitivity, selectivity, resistance to adjacent strong signal overload and resettability set it far apart from its contemporaries. It was designed in the early 1950's by Collins Radio Company under government contract and manufactured by a number of companies. Provides information about eac...
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