[amsat-bb] Re: HEO history question

i8cvs domenico.i8cvs at tin.it
Mon Dec 5 09:46:00 PST 2011

Hi Armando, N8IGJ

I agree with you.

Between 1997 or early 1998  OSCAR-10 was operating with
low level signals in 2 meters, downlink Mode-B, while OSCAR-13
was already died.

If John, AA5JG is sure about the epock of  his reception back in late
1997 or early 1998 I guess that probably he was hearing or OSCAR-10
or better RS-12 a powerful LEO satellite in Mode-T with uplink in
15 meters and downlink in 2 meters exactly from 145.910 MHz to
145.950 MHz

At that time 23 april 1996 OSCAR-10 was still operational in
Mode-B because I have the QSL card received from i8KRO for a
QSO made with him through two satellites OSCAR-10 and RS-12

The uplink on RS-12 for i8KRO was in 21 MHz and the uplink for
me on OSCAR-10 was in 435 MHz while the downlink for both of
us was in 145 MHz

RS-12 was funny because one evenig I was tuning 2 meters waiting
for the AOS of OSCAR-10 when a very strong italian station in North
of Italy comes on speaking in spanish with a station in South America,
thing impossible to be heard on two meters because OSCAR-10 was
still belove my horizon.

A quick investigation discovered that both stations where transmitting
in  15 meters between 21.210 and 21.250 MHz and RS-12 was overhead
to me in Europe so their signals were translated by RS-12 but most
interesting the South American station was able to get into RS-12 by
virtue of the ionospheric propagation so that I was able to receive both
of them through RS-12 while the South American station was weaker
and affected by a very fast QSB

Nice to remember the RS satellites !

73" de

i8CVS Domenico

----- Original Message -----
From: "Armando Mercado" <am25544 at triton.net>
To: <amsat-bb at amsat.org>
Sent: Monday, December 05, 2011 3:49 PM
Subject: [amsat-bb] Re: HEO history question

> Hi John,
> The UK and the mid-west were mutually visible
> in the morning almost the entire month of
> November, 1997, via AO-10.  There was
> a gap for a couple of weeks in December,
> 1997, but mutual visibility returned for
> the 2nd half of January 1998 into
> Feburary 1998.
> RS12/13 made morning passes visible to
> the mid-west roughly every other week
> starting October, 1997 to March of
> 1998. (didn't calculate passes beyond that)
> However, if you were tuning around in the FM
> mode and found an SSB signal loud enough
> to get your attention, I think you probably
> heard RS12/13.
> Do you remember how long you heard the
> signal? (a couple of minutes or a half an
> hour or more).  Was the signal strength
> steady or was there a slow deep QSB?
> 73, Armando, N8IGJ
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> Date: Fri, 2 Dec 2011 13:58:52 -0600
> From: John Geiger <aa5jg at fidmail.com>
> To: AMSAT-BB <amsat-bb at amsat.org>
> Subject: [amsat-bb] HEO history question
> Message-ID:
> <CAFq43LZDtAvUcUDYzFtYxe4kG0XBQK_iaGNKkR6KE0tB=H1mYw at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> Back in late 1997 or early 1998 I was using a Kenwood TR9130 on 2m SSB.
> One morning I was tuning from the FM to the SSB portion of the band, and
> heard a station just below 146mhz.  I tuned them in, and it was a station
> from Wales!  Obviously going thru a satellite as the 2 meter conditions
> weren't that good that morning.  I am now wondering what satellite it
> probably was.  Hearing it was enough to motivate me to eventually get into
> satellite operations-that took a few years though.
> Anyways, what satellite was I probably hearing?  I am guessing AO10 or
> but were they operational at that time?
> 73s John AA5JG
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