Most of you guys know that one of my interests is "Military Tube Shortwave receivers", I.E. "Boatanchors." I have a pretty fair collection of the Western types, R-390s, RA-17s, EK-07, etc. I wonder if the Soviets ever had a radio that was similar to the R-390 series, that tuned from roughly 500KC, to 30 MC ? Getting a WORKING example, if such a thing exists, would be a REAL feather in my cap.. R-390 lore states that the Soviets DID manage to procure an R-390 or R-390A at some point, sent it to Moscow, where it was examined by their Top Dawgs, & subsequently junked, because it was entirely TOO complicated for them. THAT scenario would seem to likely be untrue, given the overall level of development of the items displayed in THIS thread... They WERE Classified for quite awhile, but by 1968-69, military overruns were being offered for sale in ham journals.. The Soviets could have simply BOUGHT one, & learned of its secrets by perusing the rather detailed maintenance manuals... OTOH, there were aspects of the R-3XX's development that were STILL classified into the Eighties, simply because no one had ever asked if they could be "UN-classified"...However, apparently some of the cost figures remain classified to this day, for whatever reason...