The problem with running power in PSK mode, would mostly go away, if one is
careful about how much audio drive he is applying to the signal. To ensure
there are no side lobes on the waterfalls of other ops, you much insure you
have the input to the rig set as low as possible, and to not exceed the alc
limits. If the alc pops on, you are running too much audio from the computer.
If you are feeding into the mike port, simply back off the MIC control so that
the ALC is minimum. You should safely be able to run more power then, without
intefering with every other op on the band. Often we see people, especially
new PSK ops, with siganls every few cycles all up and down the waterfall - and
that is not too much RF power - it is too much audio drive.
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesy I upload to eQSL but if you
use that - also pls upload to LOTW
or hard card.
moderator [EMAIL PROTECTED]
moderator http://groups.yahoo.com/group/DXandTalk
----- Original Message -----
From: John Bradley
To: [email protected]
Sent: Tuesday, January 09, 2007 4:51 PM
Subject: Re: [digitalradio] Random thoughts on digital operating...
I agree with Roger that power does matter, and, like him don't understand why
some ops insist on running low power in
less than optimum conditions the idea is to get the message through. I have a
similar complaint with those hams who go out and work a 2M public service event
, using minimal power and making copy difficult when it shouldn't be.
The only time that I see power as an issue is in PSK, where a station running
QRO is wiping out a large portion of the frequency segment by dominating the
frequency. A little common sense goes as long ways, but unfortunately there are
those who would prefer to run 500w on 14070, if given any encouragement to do
so.
On non-psk modes, I usually run 80 to 100 watts since the rig I use can take
a high duty cycle (TS480) on most modes and still run nice and cool. I usually
get 100% copy reports, while struggling to copy the station running at 30 watts.
I regularly use the rig's filters to enhance the signal quality at my end.
one thing I haven't got my head around yet are the noise blankers and noise
reduction devices, which seem to have an adverse effect on the quality of some
signals. Being technically challenged I don't understand that...........
John
VE5MU
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