[sarex] Re: ISS cross band

Sil - ZL2CIA zl2cia at amsat.org
Mon Dec 22 05:03:12 PST 2008


The ISS cross-band is usually 145.800 MHz down and 437.800 MHz up. Of 
course that doesn't meant that it can't be something else.

I note however, that 145.990 MHz x 3 is 437.970 MHz. Could you be 
hearing the 3rd harmonic of your own TX?


Darren VK1HFC wrote:
> Hello to all.
> Yesterday i posted to say that i heard the crossband repeater active
> some other hams pointed out to me, that the ISS was active on packet at the
> same time.
> i also noticed that my signal report was removed from issfanclub.comovernight.
> There was another late night pass that i could prob have worked, but it was
> during my sleep time :) so i didnt try then.
> I have just tried again now, and found it to be active. 0640hr utc pass over
> VK1.
> so what is the story?? i could hear myself.......... but only when the ISS
> came into view... so it wasnt an operator error.
> I understand that this mode is experimental, with 145.99 uplink and 437.800
> downlink.
> This mode seems nice, as i dont need high power or big antennas to get in.
> Can the equipment on board support both modes at the same time?
> And is anyone interested in trying a qso with me on future passes?
> next pass is low elevation for me (approx 15deg) so should be workable for a
> little bit. due at 0820hrs UTC (thereabouts)
> nothing much else usable till tommorrow, and i read Kenneth's notes about
> the EVA, so it might be off soon anyway.
> thank you all in advance.
> Darren
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