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The R-390 is a double / triple conversion superheterodine
receiver, designed by Collins and manufactured from 1950 to 1954. It uses a mechanical digital dial, has a PTO and supports
AM and CW modes. It has 32 bands of 1MHz bandwidth each, covering from 0.5 to 32MHz. Its IFs are 9 to 18Mhz (only for 0.5
to 8MHz), 3 to 2Mhz and 455KHz. It has 32 tubes plus one semi-diode. Filtering is made with crystal and cascaded L/C filters
at 455KHz
What is possibly more interesting than listening to Russian telephone calls and an infrequent space
shot ? Well, let me tell you. There was nothing more thrilling than listening to Larry Bird
sink a long one at 5 AM, via WBZ (Boston).
The American Forces Network provided an interesting mix of news and music. Was it "Fair and Balanced?"
Probably not, but still listenable.
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