On Thu, 26 Jan 2006, Gary Schafer wrote:

On Thu, 26 Jan 2006 19:26:21 -0500, Straydog wrote:



The PEAK ENVELOPE POWER output will be 4 times the unmodulated output.
Re-read the deffinition of PEP which you deleted.

Yeah, I read it. Some of us have heard the rumor that the FCC has lawyers
write its material, not engineers. I wasn't too impressed with that
definition, by the way.

Well then if you don't believe anyone you should go and look it up for
yourself. You will find that same deffinition in the ARRL handbook. Oh
I forgot you don't believe what is in there either. Then try some of
the Collins Radio SSB handbooks. Maybe Art Collins didn't know what he
was talking about either? How about in the IEEE handbook.

Keep in mind when trying to understand PEP that there is no peak power
involved. It is all average power.

Also when calculating side band power and carrier power that is all
average power too. Forget about peak power.

Once you understand how this works then you can work from there to
figure out the rest.

I have eliminated all the other stuff as you seem to be going round
and round only for the sake of arguing and not for understanding.

I'm sorry but how you can write a sentence, above, like "Keep in mind when
trying to understand PEP that there is no peak power involved" when you
use "PEP" and "peak power" in the same sentence and say something that
sounds like "its there but it isn't there."

As I've already said in an earlier post that my problem was the conflict
between characteristic curves for tetrodes and pentodes showing no change
in Ip for large changes in Vp and the real need for Ip to move in
proportion to Vp to get a quadrupling of input power on a modulation peak
over an unmodulated carrier. This only can happen if the screen voltage is
modulated along with plate--which everyone, including me, knows--but no
one pointed out that practically all if not all characteristic curves give
only curves for one fixed typical screen voltage.

I would encourage you to go to your local library and look at some of
Terman's books or get his radio handbook from ebay etc. Also the
radiotron designer's handbook is excellent.

73
Gary K4FMX