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Good signals, ISS Repeater



Hi All:

It's good to hear the ISS Repeater back active again.
To be sucessful takes education and practice.


If you have a simple FM only 5k channel step radio,
then you will
be liminted in your ability to compensate for doppler.
If you are 5k locked, then it may be easier if you
just leave
your reciever on 145.800 and concentrate on Doppler on
the 70cm side.

Channels for a 5k channel step radio.
If you can store cross band splits on your radio, then
program
in the folllowing channels in this specific order.

Channel	 RX	 TX		Minute

1        145.805 437.790	0 - 2 AOS
2	 145.800 437.795	2 - 4
3        145.800 437.800	4 - 6
4        145.800 437.805	6 - 8
5        145.795 437.810	8 - 10 LOS

One of the nice features of FM, is that you do not
need to be exactly on freqeuncy
(The closer the better).  Each pass is a maximum of 10
minutes long.
During the fist two minutes of the pass, use channel
pair #1.
During the minutes 2 - 4 use channel pair #2, etc.
A computer with current tracking keps data and doppler
(437.800) will help you
know more percisly when to change channels.

Full Duplex:
If you have the option to run Full Duplex (Transmit
while listening at the same time)
then you should enable Auto Mute or put on headphones.
 I have been hearing
many stations not useing headphones with Full Duplex
and this results in
a lound Squeel.  In simple terms, we cant hear you
call sign because 
of the squeel you are generating.


For additional, data, check the link

I have attached a link by AJ9N about the doppler on
ISS.
http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction.txt


Also, www.Marexmg.org web 

73 Miles wf1f
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