[amsat-bb] Re: SO50

Amir's email sarlabs at twcny.rr.com
Tue Sep 19 09:30:47 PDT 2006

I just use a memory slot for that purpose, actually I just tune for Doppler
shift by using memory slots too.

Amir Findling, 73 de K9CHP, member ARRL, AMSAT #36083
Coordinator, Senior K9 Handler Western NY SearchDogs, Inc.
K9 Certification Tester, NYS Federation of SAR Teams
1st Special Response Group (1SRG) http://www.1srg.org/

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org]On
Behalf Of M0ZLB
Sent: Tuesday, September 19, 2006 11:21 AM
To: APBIDDLE at mailaps.org; 'Amsat BB'
Subject: [amsat-bb] Re: SO50

Thanks Alan,

Bit of a "performance" reconfiguring for the switch on tone and then
switching back for the shortish pass! Guess that's why it seems unused over
here, no-one can be bothered!

I'll have a try on the next pass!


-----Original Message-----
From: Alan P. Biddle [mailto:APBIDDLE at MAILAPS.ORG]
Sent: Tuesday, September 19, 2006 4:16 PM
To: 'M0ZLB'; 'Amsat BB'
Subject: RE: [amsat-bb] SO50


It is a DIY process these days:


Weekly Satellite Report

To switch the transmitter on, you need to send a CTCSS tone of 74.4 Hz. The
order of operation is thus: (allow for Doppler as necessary)

1) Transmit on 145.850 MHz with a tone of 74.4 Hz to arm the 10 minute timer
on board the spacecraft.
2) Now transmit on 145.850 MHz (FM Voice) using 67.0 Hz to PT the repeater
on and off within the 10 Minute window.
3) Sending the 74.4 tone again within the 10 minute window will reset the 10
minute timer.


Note that there is a brief but noticeable delay between keying your
transmitter, and the satellite transmitter coming up.  A quick "kerchunk"
will not work to see if it is up.  Use a couple of seconds with 74.4 Hz to
arm the bird, and then switch to the other PL.  From there, you can tell
when it comes up.


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