Quote:
Originally Posted by 2fastdriving
George, small correction: the larger tube is a 6550. The smaller tubes are the 6h30.
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The 6H30 (aka known as 6N30, as the actual Cyrillic letter resembles both an "N" and an "H") are a Soviet military avionics tube and are extremely durable. They should be good for at least 10,000 hours or so.
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Last edited by Puma Cat; 12-03-2020 at 01:37 PM.
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