[Amps] Maximum RF output in practical application: 4-250A

[R L Measures]

On Jul 3, 2006, at 4:09 PM, wc6w at juno.com wrote:

>
>
> -- R L Measures <r at somis.org> wrote:
>
> Hi Rich,
>
>>>  was the plate/anode white hot?
>>>
>>>
>>> Hi Rich,
>>>   Not if the tube is operated at 90% efficiency.
>
>> And if the 4-250A is operated at 110% efficiency in high humidity,
>> frost will form on the envelope during lengthy transmissions?
>
>   Fortunately, farsighted tube designers included the heater/filament
> to circumvent this likelyhood.

excellent chortle!
>
>> ...
>
>   It does take a total of 9 variable coils & caps all motor driven.
> I'm not clever enough to chain them together.

Ouch
>
>   True, it is not economical.  I did state that this was an
> impractical approach in my first note.
>
>   However, if the FCC should happen to change the rules so
> that "power" is measured at the AC cord, then we might be a mite more
> circumspect as to how we use it.  :-)

IMO, the FCC could not care less about amateur radio as long as we  
don't have any wardrobe malfunctions.

cheers, Marv
>
>
> http://wc6w.50webs.com/
>
>
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> *
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R L MEASURES, AG6K. 805-386-3734
r at somis.org