[amsat-bb] Re: ISS Repeater

n1jez@burlingtontelecom.net n1jez at burlingtontelecom.net
Tue Dec 30 03:34:55 PST 2008

Yeah, close enough. I hope to try the 1235 UTC pass coming up in an hour 
from now.

Mike, N1JEZ
AMSAT 29649
"A closed mouth gathers no feet"

----- Original Message ----- 
From: "David Barber" <david.barber at dbelectronics.co.uk>
To: <amsat-bb at amsat.org>
Cc: <n1jez at burlingtontelecom.net>
Sent: Monday, December 29, 2008 8:56 AM
Subject: RE: [amsat-bb] ISS Repeater

> So guy's correct me if I'm wrong but from a rough calculation that puts
> Mike's ERP at 4.7Kw.
> Leaving my 170w ERP looking rather meagre by comparison! :-)
> Congrats to Mike and Clare on their contact.
> Regards
> David
> -----Original Message-----
> From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
> Behalf Of n1jez at burlingtontelecom.net
> Sent: 29 December 2008 12:36
> Subject: [amsat-bb] ISS Repeater
> Just got on the ISS repeater - L band up and V band down from FN34 here in
> Vermont.  I used full power here. 80 watts in the shack to a 55 el 1269
> Directive Systems loop yagi. Transmission line is 75' of 7/8" hardline.
> Results were mixed. The pass was 25 degrees max here. I had little to no
> success as the ISS was ascending. I opened the repeater a couple of times.
> I'm not sure if this was because other stations were trying and we were
> clobbering each other or not. As the ISS was going overhead, it appeared
> that the polarity was shifting rapidly as I would open the repeater for 
> just
> a word or two. I did hear Clare, VE3NPC briefly. As the ISS was 
> descending,
> things got better and I was able to consistently open the repeater, but
> nobody came back.... I could not access the repeater below 10 degrees....
> If anyone else was on and trying, can you let me know? I'd like to see if
> that was the reason I couldn't access the repeater as it was ascending. 
> One
> other observation, I found the doppler correction to be pretty critical.
> I've seen this when running low power into AO-51 for tests.
> I hope to try a few  more passes this week.
> 73,
> Mike, N1JEZ
> AMSAT 29649
> "A closed mouth gathers no feet"
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