Bob B,
I have one answer...
On the 20:10utc pass of NO-84 today, I turned on the FM transmitter and shortly after, saw a CW signal on the waterfall. (source unknown) The result was "Zero" copy of the PSK-31 on the down link. This is the same outcome I have experienced using PSK-31 on FO-29 and other linear satellites. One CW signal will disrupt PSK-31 operation.
This 'first' experiment brings up the question: does the pulsing of the CW signal disrupt the up link, down link or both ? All prior testing was on LSB/usb satellites. This was on a USB/fm satellite.
This test needs to be repeated.
Bob KO6TZ
And also PSAT, with its 28.120 linear uplink and FM downlink. Although someone has to be transmitting PSK31 for the auto-transponder to come up, any weak CW in the same spectrum should be heard. Although I should not recommend such use, so as not to disrupt normal band plan operations, it is a nice experiment and since the PSK31 transponder is usually never more than about 5% loaded (1 user maybe?) it's a shame not to experiment with it...
-----Original Message----- From: Paul Stoetzer Subject: Re: [amsat-bb] CW straight key nowadays
<snip> ...the following satellites have linear transponders available
for use:
FO29 AO-7 AO-73 XW-2A XW-2C XW-2F [PSAT 28.121 up and 435.350 FM down.]
Watch your power on CW - especially on AO-7 [and PSAT]. A very strong CW signal can make the transponder useless for others, and in the case of AO-7, cause it to mode jump at certain times of the year.
73,
Paul, N8HM
On Sunday, April 3, 2016, andy thomas via AMSAT-BB <amsat-bb at amsat.org> wrote:
Hi Just sorting out the garden and antennas this Spring day. I have my preamps wired into the feed lines and want to get on air with a challenge a bit more than FM.
So I'm wondering what is currently available to work in CW (Only straight key and I'm not very fast!)? FO-29, I suppose, but anything
else?
73 de andy G0SFJ