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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: RE: TFA-204 300B Operating Points posted by jdrouin on March 10, 2017 at 13:39:17:
3K is not the series resistance of the primary. 3K is the OPT's primary AC impedance. What you need to input, is the transformer's primary DCR which you can just measure with a DVM. That value should be anywhere from 150 to 300 Ohms as is typical for most transformers. If the primary's DCR is say 200 Ohms, there will be a drop across it of: 200R x 0.06A = 12V. You will be going from 250V down to 238V at the tube's plate.
Edits: 03/12/17
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Follow Ups
- RE: TFA-204 300B Operating Points - sideliner 21:50:16 03/12/17 (1)
- RE: TFA-204 300B Operating Points - jdrouin 22:08:26 03/12/17 (0)
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