-- R L Measures <r@somis.org> wrote:

<snip>

>  was the plate/anode white hot?


Hi Rich,
  Not if the tube is operated at 90% efficiency.

  You may want to review Kahn's Envelope Restoration technique in the
Proceedings of the IRE, Vol. 40, July 1952, pp 803-806

  Some further details are shown in the Proceedings of the IRE, Vol.
44, December 1956, pp 1706-1712.  The curious may wish to recalculate
the numbers in Appendix One with a 90% efficient RF power stage, in
lieu the 80%, plus a 90% efficient Class D audio modulator instead of
the (55% efficient) 1950's vintage Class B stage.

  An article describing a 90% efficient RF stage is posted on my
webpage at: 

  http://wc6w.50webs.com/wc6wamps/index.html?fr422.html

Soooo...now, how much power does the plate have to dissipate, running
2KW peak, if it's 90% efficient?  Don't forget that the average power
of a (two-tone) SSB signal is only half the peak.  The tube won't even
glow.

73 & Good morning!
   Marv WC6W


<snip>

*


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