[AMRadio] AM Bandwidth and Audio Quality

[D. Chester]

> From: Rob Atkinson <ranchorobbo at gmail.com>
>
> I was going to post a reply about this to Ed McKie a few days ago and
> blew it off because of power fatigue but one of my points was that you
> can get a thermocouple amp meter at a fest flea market for not much
> (yes I know they may be broken but not _all_ of them are) but if you
> play by the nonsensical 375 watt business do the math and you get a
> current value that you can't measure accurately with an old analog
> meter.   I think it is something like 2.7816 A.   This is why if there
> is going to be any kind of AM power limit, it should be input on the
> PA that can be measured with the PA current and B+ voltage, or some
> nice measurable power output into 50 ohms like 450 watts which would
> be 3 A and much easier to nail down.  3.5 A would be better hi hi.

Rob,  the only problem with that some of us don't work our rigs  into a 50 
ohm transmission line running close to 1:1 SWR; we may feed our link-coupled 
transmitter directly into a balanced open wire line, operating either as 
tuned or untuned feeders, whose load impedance may vary widely from one band 
to another or even across a single band. Hams operated similar high 
efficiency antenna systems for at least two decades before 50-ohm coax was 
ever thought about.

Now, how exactly would you connect your Bird 43 in such a configuration?

Don k4kyv


PS TO EVERYONE!!!

THESE THREADS  WOULD BE SO MUCH EASIER TO READ AND WOULD TAKE UP A LOT LESS 
"BANDWIDTH"  ON THE SERVER IF EVERYONE WOULD SNIP THE HEADERS,  REPLIES AND 
REPLIES TO REPLIES AND DELETE EVERYTHING IN THE TEXT OF THE ORIGINAL 
MESSAGE NOT DIRECTLY RELATED TO WHAT IS BEING COMMENTED ABOUT OR REPLIED TO. 
WHAT I GET TIRED OF  IS SCROLLING THROUGH THE SAME TEXT OF THE SAME MESSAGE 
OVER AND OVER AGAIN 20 TIMES JUST TO GET FROM THE BEGINNING TO THE END OF A 
SINGLE DIGEST OR FROM ONE POSTED MESSAGE TO THE NEXT.
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