My expericnce, I run any where from 15 to 45 watts on psk31 about 85% of the
time and when the bands are poor or the dx seems to be pointed the wrong
direction I crank my power in about 5 to 10 watts steps untill they either hear
me or I run out of power lol. I have peaked 150 watts psk31 on 20 m at 4 am
central time trying to work a dx that was 10 over 9 here but i was 22 to 33 at
his qth, after i raised power, he didn't hear me at all untill i broke 100
watts and got 50% copy after 150 watts.
Matthew A. Chambers,
ARES Official Emergency Station
NEMO ARC Activities Director
Macon ARC and ARRL Member since 2003
"Peter G. Viscarola" <PeterGV@...>:
perennially interesting topic. I hope the more experienced operators
> here aren't sick to death of discussing it yet, and are willing to
> me some guidance.
Absolutely spot on Erick. That is one reason that we try to tell new
>> people, on the digital bands, to start with as few watts as they
> Agreed. One should ALWAYS use as few
watts as possible to establish
> reliable communications.
>> There is just no reason to run 100 watts ( and I
expect some run more)
> on the
>> PSK, etc. digital modes.
Everytime I say that though, someone jumps in
> Weeeelllll.... I'm far from an expert, OK? I've only a few
> a few hundred QSOs experience in digital modes. And I
> there are lots of folks who've gotten DXCC running QRP
to a wire hanging
> out their window (I just read about a JA ham who
works 500 milliwatts to
> a dipole on his 11th floor balcony).
> BUT... I can tell you from experience that when I'm in a
> trying to crack a DX pileup, putting 40W into my dipole
> doesn't "do it". Often I can hear the DX, but
they can't hear ME. Or I
> get repeated "QRZ de..."
replies. Even on PSK31.
> OTOH, if I crank to 85W or 100W
or so, the DX can hear me, I get the
> QSO, and my IMD meter still
reads around -30db. Say
> "it's only 3dB difference" if you
like, but I've repeatedly seen better
> results in contests and pileups
with 80W than 40W. This is PARTICULARLY
> true with RTTY, where I've
cranked it up to a couple of hundred watts
> when necessary.
> Let me hasten to add: I certainly DO NOT want to be an
> operator, and I ONLY wish to operate my station in
accordance with best
> practices. Seriously.
how does one reconcile the oft-repeated mantra "only run 25W or
> with my experience? Am I *really* bothering my fellow
> operating outside the bounds of acceptable practice, if I
crank my PSK31
> output to 85W to get a "new one", when my
signal is clean and my
> measured IMD is low?
> If my
(strong but clean) signal captures somebody's AGC should they not
simply narrow/change their IF bandwidth to eliminate the strong signal
> (heck, when in a PSK31 QSO I often narrow down to 50Hz just for this
> purpose). If they see sidebands due to receiver overload or lack of
> sound card dynamic range, is that a problem with MY station?
> I'm not trying to be argumentative here, rather I'm curious about
> people's experiences and advice.
> de Peter