[ICOM] IC-718 / PSK31 / "phase noise"

[Frost, Charles]

That is all well and good unless you are in a far away place like
Botswana. we will be doing some psk from A25 starting around the 6th of
July for about 10 days or so. The phase noise is from the rig not over
drive on psk. We used 2 IC-7000s last year in Mozambique and the phase
noise was bad. So filters are what is needed.

Frosty
K5LBU/A25CF

-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
On Behalf Of Jim Miller
Sent: Thursday, June 21, 2007 9:40 AM
To: ICOM Reflector
Subject: Re: [ICOM] IC-718 / PSK31 / "phase noise"

PSK31 doesn't want high power.  All you do is splatter and destroy the
band.
Keep your power below 25 watts, turn off your compressor and keep the
mic
gain LOW.  All these will make for a clean signal from the radio that
will
create the psk31 output you (and everybody else) wants to hear.

73, Jim

----- Original Message ----- 
From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
To: <icom at mailman.qth.net>
Sent: Thursday, June 21, 2007 5:37 AM
Subject: RE: [ICOM] IC-718 / PSK31 / "phase noise"


> Overdriving of the rigs by the PSK-31 equipment?
>
> 763 - Mac, K2GKK/5
> Oklahoma City, OK
>
>
>
> ----Original Message Follows----
> From: Steve Lewis <n8tfd at one.net>
> Reply-To: ICOM Reflector <icom at mailman.qth.net>
> To: icom at mailman.qth.net
> Subject: [ICOM] IC-718 / PSK31 / "phase noise"
> Date: Wed, 20 Jun 2007 23:29:46 -0400
>
> So we were testing out some Field Day radios and antennas tonight.
>
> We even put a mil-spec radio (SG-2000) on as the PSK31 rig...with the
hope
> that it would be less "noisy" than others.
>
> No matter what we do -- our IC-718 gets "blasted" by phase noise
across
> several bands, whether the PSK31 transmitter is IC-706 or SGC's.
(Other
> radios hear it, but this one really gets pounded.)
>
> It seems like a lot of people do PSK31 @ Field Day and don't report
issues.
> Are we missing something?
>
> This is on-topic since the Icom radio is the "victim".  :-)
>
> -73-
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
>

----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/