USSR radiosonde
Tube based soviet radiosonde. R. Amann, J.M.Cooper, R.W.Davies: "The Technological Level of Soviet Industry", ISBN: 0300020767, Yale University Press, 1970.
Caption: An extreme example of delayed innovation: thermionic valves used in a radio sonde, where a very strong case can be established for using transistors. Source: Mashpriborinterg Bulletin, 1970, No. 8, p. 23.
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Taken on Saturday January 1, 1977
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Posted on Wednesday February 8, 2023
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