|[AMRadio] AM power|
cozy659 at yahoo.com
Sun Jun 19 09:51:58 EDT 2011
YES THEY DO...
--- On Sat, 6/18/11, Bob Macklin <macklinbob at gmail.com> wrote:
> From: Bob Macklin <macklinbob at gmail.com>
> Subject: Re: [AMRadio] AM power
> To: ka4inm at tampabay.rr.com, "Discussion of AM Radio in the Amateur Service" <amradio at mailman.qth.net>
> Date: Saturday, June 18, 2011, 9:16 PM
> Does the FCC still have Field
> Engineers that can/will go out and check ham
> Bob Macklin
> Seattle, Wa
> ----- Original Message -----
> From: "Ron Youvan" <ka4inm at tampabay.rr.com>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Saturday, June 18, 2011 6:04 PM
> Subject: Re: [AMRadio] AM power
> > Rob Atkinson wrote:
> > /*snip*/
> >> So my agenda was to make a point, the point being
> that the mythical
> >> 375 watt power limit is 100% b.s. on two or three
> levels, the first
> >> being it's having a peak envelope power limit as
> its basis, which is a
> >> jackass rule since, for one thing, how is this
> measured with precision
> >> by an average ham.
> >> Now we get to AM where measuring a carrier to meet
> an exact numerical
> >> requirement is basically impossible unless you are
> at the NIST, and
> >> measuring peak positive modulation with any
> accuracy is impossible,
> >> made more complex with asymmetric voices, which
> most males have. We
> >> can estimate; that's about it. If
> the FCC were realistic, the rule
> >> would provide a fudge factor like a figure +- 5 or
> 10 % on carrier
> >> power with a positive modulation limit of 150% and
> forget the p.e.p.
> >> crap. Most hams could stay under that
> without a lot of fancy
> >> measuring equipment.
> > If you wish to be legal and push it
> to the limit you can buy a peak
> > reading Wattmeter.
> > The 375 Watts is a "guide line" not any limit, it
> tells you where you
> > should be when setting up your
> > output power. ( B 4 you start yelling CQ CQ CQ
> > The FCC allows broadcasters a +10%
> and a -20% tolerances, but if your
> > calibration is certain to
> > only 5% your limits are -5% and - 15%.
> > If the FCC gave HAMs a tolerances
> factor HAMs would tend to over do
> > everything by that much more,
> > it's human nature.
> > --
> > Ron KA4INM - The man who sets out
> to carry a cat by its tail learns
> > something
> that will always be useful and which never will grow
> > or doubtful.
> > Mark Twain.
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