[AMRadio] AM worldwide

[ARS W5OMR]

Just a point of contention ...
There's a huge difference in an ART-13 and some gutless wonder solid state
rig.
The ART-13 has Class C, plare modulated funal, whereas the solid state rig
is anything 'but' plate modulated.
 In the latter, if your final is capable of producing 100w in the output
stage, the ~20% of that is your carrier, and the other 80% is required to
cleanly modulate that 20 or so watts to 100%.
If The plate modulated rig runs 100w of carrier, then the PEP output,
generally speaking, would be around 400w.

40w from a solid state rig running a 100w final will burn that final up in
a hurry.

I run a Ten-Tec solid state SDR rig these days (still have the homebrew
250TH' x 250TH's - just no time and no space to get it back on the air) and
I run the Trn-Tec into a Drake L-7 amp - pair of 3-500z's - exciting the
final with about 12 or 13w to get ~150/175w out. I have run as much as 200w
out but the tubes start showing color. The dissipation level is high on
those tubes in linear AM mode.

73 de W5OMR


On Fri, Aug 24, 2018, 08:03 Daniel Artaud F6BRD via AMRadio <
amradio at mailman.qth.net> wrote:

> Rob,
>
> No, they don't, They are too serious for that HI!...
> I love AM because it is the way I descovered Ham Radio in 1966 when my
> parents put the radio in the attic. This lent me to have a job in the
> TV/Radio broadcast industry during 42 years. It was a pleasure to work
> or to get close up with "Beasts" in VLF to UHF and few milliwatts to
> several hundred kilowatts.
> As a retired man, it's a real pleasure to discuss in AM and feel zen.
> But as a technician, I am always planning something to experiment.
>
> 73, Daniel
>
> Le 24/08/2018 à 11:57, Rob Atkinson a écrit :
> > Hi Daniel, thank you for explaining.  That means carrier can be around
> > 100 to 150 watts.  That explains popularity of ART-13.  If I were in
> > France I might be an outlaw, hi.  But 100 w. on the Continent may be
> > okay provided one has a good antenna.  Yes the Germans made AM
> > illegal.  They don't know how to have a good time.
> >
> > 73
> >
> > Rob
> > K5UJ
> > On Thu, Aug 23, 2018 at 5:04 PM Daniel Artaud F6BRD <f1enp at yahoo.fr>
> wrote:
> >> Rob,
> >>
> >> I re-read the french regulations. They say: under 28 MHz: 500w pep; 28
> >> to 29.7 MHz: 250w pep; 144 MHz and up: 120w pep whichever mode you are
> >> using. Many are outlaw. To be closer to legallity we can use AMC
> >> (Amplitude Modulation Compending) as used in broadcast transmitters here
> >> in France.
> >>
> >> I don't know about DL land but I never heard a german network, I often
> >> hear G stations around 3615 kHz.
> >>
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