> If I want to stay -legal-, I need to keep my carrier power just under
>100w, because my rig -will- produce an SR of 4. Re-read that page
>again, and then read it again, and let it soak in.
>http://www.qsl.net/wa5bxo/asyam/aam3.html
>Those 250TH's, with nearly 3kV on their plates, idle at 120mA, resting
>current, when B+ is on. They are modulating another pair of 250TH's in
>the final, with a max of 1500v (when the variac is cranked up) at around
>250mA for max smoke (which I hardly ever run). The -normal- operation
>of the final is 800~1000v @ 150mA for around 150w DC input, and 100w of
>carrier output. With that light of a load on the final, there's -more-
>audio available. Glad to say that I don't get an SR of 4, when running
>250w carrier output, but it ain't 2, so I don't go higher.
Geoff,
If you have to keep your carrier below 100 watts to stay legal, then why do
you need 250THs, with 3 grand on the plates no less, to begin with?
That stage is MORE than capable of modulating a kilowatt final. Sort of a case
of swatting a fly with a sledgehammer.
It's interesting tho... I don't think I've ever heard of a rig that runs a
much higher B+ on the modulator plates than it runs on the FINAL.
Mr. T., W9LBB
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