On Mon, 2009-06-15 at 23:07 +0000, kd8bxp@aol.com wrote:
Well thanks to everyone who gave me helpful hints and ideas I did almost make a contact today!
Well done! Good fun, isn't it? ;-)
I know I got into the SO50 today at about 11:10 - 11:11 est (local time) I heard some one give my call back and a brief report
Unfortuntally at the same time doppler shifted on me and I wasn't fast enough to keep up
I am using a th-d7ag and unfortunally there is not a way to program the odd band split in memory (at least not that I have found) so no matter what you have to hit two buttons. Anyways I diegress
I wouldn't be hugely surprised if the TH-D7 is similar to the TH-F7 which I use. I got into a technique of flipping between A and B to transmit or tune Doppler. In the higher parts of the pass the range is changing relatively slowly and SO-50 should hang about more-or-less on frequency for a good couple of minutes.
One of the mistakes I was making early on was not tuning far enough for Doppler, and the other was changing too quickly. It doesn't shift as fast as you might think. For the most part you won't have to worry about Doppler on transmit, but on receive it makes a huge difference. Well actually - on VHF you don't have to worry, on UHF it makes a difference. If you're using the ISS crossband repeater, that has its input on UHF and then you leave the receiver alone and tune the transmitter - much more fiddly because you *must* listen to the downlink to get it right!
Headphones make all the difference, too - it's much easier to spot the change in noise when you're on the satellite. When it's transmitting received noise, you can hear it has a distinctly different tone to "empty sky".
Congratulations on your first contact on the satellites!
Gordon MM3YEQ (*still*, hurry up Ofcom)