[Amps] RE: 4CX250B Screen Supplies

[Ian White, G3SEK]

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