The recent Joe Scott video The Mysterious "Lost Cosmonaut" Recording | Random Thursday describes radio recording said to have been made by the Judica Cordiglia brothers from Italy in the early 1960's.

At 04:09 he plays a recording supposedly from February 1961, and at 05:02 he plays "the most mysterious one by far" said to be recorded in May of 1961.

My question is not as much about the veracity of the recordings as it is the nature of the transmissions used by the Soviets circa 1961 and the reception equipment used by the Judica Cordiglia brothers.

What frequencies were likely used by the Soviet space program for communications between spacecraft and Earth circa 1961? Were they say above 50 or 100 MHz and probably required line-of-sight for reception in Italy, or were they substantially lower so that some combination of reflections and refraction could bring over-the-horizon signals to their antennas in Italy?

Text below the not necessarily technically correct, dramatic "reenactment" Kosmonauta says 1962.

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A lot of information on the site www.svengrahn.pp.se

Notes on the space tracking activities and sensational claims made by the Judica-Cordiglia brothers http://www.svengrahn.pp.se/trackind/Torre/TorreB.html

Analysis of the information provided at the "Lost Cosmonauts" web site Conclusions In general the Judica-Cordiglias never seemed to understand that extraordinary claims require extraordinary evidence to be believed. They never have produced such extraordinary evidence..details about reception frequencies, log books etc.. The recordings published on the "Lost Cosmonauts" website is an improvement in this respect, but unfortunately these recordings do not impress.... . It is also a pity that details of receptions by the Judica-Cordiglia brothers of more "hum-drum" satellites are not easily available. This could help in evaluating their credibility by cross-checking their reports with those of other satellite trackers.

In summary, the sensational stories that were put our by the Judica-Cordiglia brothers and how they have been propagated through the years are interesting as a social phenomenon - how myths begin and self-perputate themselves..!

Space tracking efforts by others http://www.svengrahn.pp.se/trackind/trackin1.htm

Radio signals from various satellites recorded near Stockholm, Sweden: Soviet/Russian satellites http://www.svengrahn.pp.se/sounds/sounds.htm

Three little unsolved riddles from early radio tracking of Soviet satellites http://www.svengrahn.pp.se/trackind/riddles/Riddles.htm little unsolved riddles

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  • $\begingroup$ This is very interesting background information, thank you! But I'm also still looking for the answer to "What radio frequencies were used by the Soviet space program circa 1961?" $\endgroup$ – uhoh Aug 11 '19 at 11:52
  • $\begingroup$ the same as write www.svengrahn.pp.se svengrahn.pp.se/trackind/Vostok5and6/Vostok56.htm svengrahn.pp.se/trackind/Vostok3and4/Vostok34.htm $\endgroup$ – A. Rumlin Aug 11 '19 at 12:06
  • $\begingroup$ if the answer to my question "What radio frequencies..." is in that link, then they belong in your answer, not in a comment. Otherwise this becomes a link-only answer. $\endgroup$ – uhoh Aug 11 '19 at 12:06
  • $\begingroup$ In Russian - "УКВ (143,625 МГц) и КВ (9,019 и 20,006 МГц) двухсторонней радиотелефонной связью" kik-sssr.ru/Hist_3_Otrab_Vostok.htm $\endgroup$ – A. Rumlin Aug 11 '19 at 12:12
  • $\begingroup$ I'll gently mention again that answers should be put directly into your answer post, not left as comments. Temporary -1 to encourage you ;-) $\endgroup$ – uhoh Aug 11 '19 at 12:16

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