Rich suggested to ask about the secondary resistance, and Dick suggested
to ask about the primary resistance. They make a good team, because you
really need to know both.
The effective secondary resistance - the value that figures in all the
design charts and computer programs - is:
(actual secondary resistance) +
(primary resistance + mains supply resistance) * n*n
where n is the step-up turns ratio.
Very roughly, in a well-designed transformer the effective resistance
seems to be about 2x the actual secondary resistance.
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek
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