Compared to poor regulation, yes. Compared to a well-engineered zener
shunt screen regulator, probably not a significant improvement. To
arrive at good linearity with a 4cx250B/R/BC/7203, load for less screen
current, use maximal anode supply V. and add c. 5-ohms of RF-NFB R in the
cathode (Rk). See Fig 10 on my Web site.
>G3SEK is vacationing in the states at the moment, but he gets significant
>improvement in IMD suppression with the tube by holding the screens within
>millivolts using active regulation.
>
>W4ZCB
>
>
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>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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