R. Measures wrote:
"The real point is that even under these favorable conditions, a
zener-regulated supply (with a capacitor) *still* produces notably more
IMD than an electronically regulated constant voltage supply. This is
not surprising, because a well designed electronically regulated supply
will have a much lower output impedance than a string of zeners."
To me it is surprising since a 2-tone, 1000Hz-spaced test should
consume constant current from a C-filtered PS whether it is regulated
or not..
Constant *average* current, yes - but this whole discussion is about the
variations above and below that average, within each modulation cycle.
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek
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