Thread: Tube ID
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Old 04-02-2020, 08:21 PM
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Electronic M Electronic M is offline
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Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 15,446
Glad to help.
Regarding bumble bee caps. Can you read resistor color code? And are you familiar with modern capacitor rating nomenclature that uses 2 digits and a multiplier to express capacitance in picofarads (is 102 is .001uf(1000pf), 153 is .015uf, 224 is .22uf)?....a bumbel bee is the modern numbering system encoded using resistor color code...the first 3 bands are capacitance there is usually a 4th grouped with the capacitance bands that I believe is tolerance (I typically ignore it) then there's 1-2 more bands that are further away representing the voltage in hundreds. A single red band is 200V a pair brown and blue is 1600V.
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Last edited by Electronic M; 04-02-2020 at 08:28 PM.
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