ORIGINAL MESSAGE:
On Wed, 15 Apr 2009 12:10:13 +1000, robert briggs <vk3zl@bigpond.com>
wrote:
>
>The running conditions are now as follows...with 75 watts of carrier the
>amplifier easily produces slightly over 1000 watts out....Increasing the
>drive to 95 watts carrier the power output is 1400 watts...Anode current
>for 1000 watts is just on 800ma
REPLY:
Glad you got it working! Congratulations.
I am a little concerned about the efficiency, however. If I'm doing
the math right, the efficiency at the 1000 watt level is only about
43% (subtracting the 75 watt drive from the output, since this is
grounded grid).
1000 - 75 = 925 watts output.
DC input is 2700 * .8 = 2160 watts.
925 / 2160 *100 = 42.8%.
Seems to me it should be better than that, don't you think?
73, Bill W6WRT
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