[Lowfer] KFI Captures and stability of AM Stations

[Jay Rusgrove]

Ed

Roger on your tirade - no argument here. Never did understand who thought we should
bend over backwards and switch to the metric system - must have been another brilliant
idea by the politically correct weenies.

I'm off to check 640 kcps! Come to think of it, I liked uuF better as well.

Jay



Ed Phillips wrote:

> Jay Rusgrove wrote:
> >
> > Les
> >
> > The receiver setup I'm using here has all the oscillators tied to GPS so there
> > is essentially no drift - maybe .02 Hz ... so the signals in the capture below
> > are exactly as they appear. I've monitored a number of am station carriers over
> > the last couple years and many are, indeed, all over the place. Guess that's the
> > beauty of an am detector!
> >
> > http://www.advancedreceiver.com/capture/KFI081003.jpg
> >
> > Jay Rusgrove, W1VD
>
>         That is indeed an advantage of DSB AM detection.  At least in the old
> days the main purpose of precision frequency control was to reduce
> interchannel interference and to cause beat notes for weak signals on
> the same frequency to be at inaudible frequencies.  I worked as an
> illegal part-time operator in a small AM station around 1942 and the
> station had a GR frequency deviation meter with red lines at + and - 10
> cps from the nominal frequency.  In those good old days we used cps in
> memory of Charles Proteus Steinmetz, the EE giant at GE in the early
> days of electric power in the US.  The use of Hz to honor Heinrich Hertz
> is a much later european introduction.  Hz are fine but I prefer cps,
> kcps, mcps, etc.  I'm also an opponent of changine the U.S. over to
> metric measure.  Examples of how the latter have been adopted here
> including "liter gasoline" which is more expensive than "gallon
> gasoline" but not so obvious to the average automobile owner, 750 ml for
> wine bottles in place of fifths of a gallon, etc.  Why change something
> which works just fine and has for hundreds of years?
>
>         Forgive the latter tirade.  I'm sick and tired of publications whose
> editors attempt to use metric by mentioning such things as 2.54 cm
> boards in place of 1 inch boards, which really finish out significantly
> thinner, or metric dimensions for something like a ball park where it is
> obvious that there had been a conversion from square feet or acres,
> carried out to many more significant figures than made any sense.
>
> Ed
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