First reports on my QRSS signal
This week I started some QRSS transmitting tests, sending my callsign at QRSS3 (3s for a ‘dit’) with a 1 minute spacing before the next sending. Yesterday, Mark KU7Z in Northern Utah reported seeing my QRSS signal. At the time I was running 500mW from the K3 using basic on-off keying. Today I reduced the power to 200mW and was seen again by Mark (see image above), as well as turning up on VE7TIL’s grabber. See below.
My signal is in there, right at the very bottom of the screenshot.
Getting into the 100Hz QRSS ‘band’ can be tricky. I certainly appreciate these reports. As they help me to adjust the frequency as necessary
The problem of trying to get into the QRSS zone has prompted Bill, I0/N2CQR to proposed through his SolderSmoke blog and podcasts a way of helping North American amateurs to calibrate their transmitters and lock into this very narrow band. Remember, we are talking about 100Hz, approximately 1/27 of the typical SSB signal bandwidth. Bill’s proposal makes good sense. I am fortunate that the K3 has a fine frequency adjustment so I can shift in 10Hz steps, but of course there will be a small frequency error, which is looking like around 40 Hz with my K3. You can read, from a previous post, about how I calibrated my K3 reference oscillator.
So a successful weekend with QRSS, More transmitting than receiving this weekend. Now it is time to start building the dedicated QRSS transmitter. I have a draft design in my note book, just need a little spare time to build it, which unfortunately I do not have too much of at the moment.
Finally, many thanks to Mark, KU7Z for the report and VE7TIL for providing the grabber.