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Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an
Special page devoted to
Vacuum Tubes
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ANTENTOP-
03- 2003, # 004
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Vacuum Tubes
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When the standard GOST-5461-50 was introduced in this country, the system
of marking of radio valves was put in order. The principles of classification
mostly remained the same. The marking of new types of valves ("finger-shape" etc.) were already envisaged
in the above-mentioned standard.
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Made in the USSR
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The valves produced abroad. Photo shows valves: 6F6 by
the "Kentucky Radiotrones", EM34 by the "Philips"
(a tuning indicator with two diametricaly set sectors), 5U4G by
the "Sylvania Thorn Colour Television Laboratories Ltd.",
6X5 by the "Tung-Sol Electric Inc.", 6K7 by the "Kentucky
Radiotrones", RGN1064 by the "Telefunken".
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In
mid 1950's the construction of the octal valves was modernized.
With no more fastening of the holders of electrodes on the so-called
"crest-pod" (left) a conciderable decrease of the valves
sizes was made possible (right). On the photo: two different versions
of the 5691 tube made by the RCA.
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The
glass analogs of the European metallic valves with outer screening
coating. On the photo: 6SQ7 and 6SJ7.
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Last Updated:
February 29, 2020 23:13
