Re: [amsat-bb] more tests

["Colin Hurst" <hurst_cj@xxxxxxxxxx>]

Guy,
When AO40 rises after a perigee due North of Australia and the
transponder comes on at MA10 the downlink is full of intruders.
These signals are virtually from one end of the passband to the other.
As range increases they start to drop off, however I suspect that the
two signals you are hearing are a couple of FM intruders that hang
in there for some considerable period of time. I would suggest that
they are two strong to be image frequencies.
When in close they are noise free. Some are voice modulated and
others appear to be communication links (the stronger ones).
If I were a betting man (I prefer to spend my funds on AR)
I would wager that they emanate from the islands due North of
Australia. Perhaps I should enlist the aid of the children in the area
(mine have flown the nest) who learn the languages of our
neighbours to our immediate north.  This is my first experience with
70 cm  inrtuders, but we are very familiar with the fact that uplinking
on 145 Megs to the digitals to our north is nigh on impossible until
those birds pass out of the offending footprint.
Does confirm one thing, AO40 has very good ears on 70 cms.
Regards,
Colin VK5HI

----- Original Message -----
From: "guy lemke" <guy@com-pair.net>
To: "Francesco Messineo" <iz5dwf@AMSAT.Org>
Cc: <amsat-bb@AMSAT.Org>
Sent: Thursday, August 02, 2001 4:59 PM
Subject: Re: [amsat-bb] more tests


> Francesco,
> I observed similar signals last night but they were in the 2401.350 to
2401.395
> part of the band.  I could not hear the beacon then all the sudden it was
their and
> very loud.. At 20,000 Km's I had 9 over on my S-meter ( FT-736r).
>
> After acquiring the beacon I could only hear one station out of japan
around
> 2401.375 and two stations using CW around 2401.360. I also heard one
station using
> voice (english) for a very short period of time calling CQ and then
nothing... for
> the rest of the pass, also some very deep fades for most of the pass.
>
> I have a ADIC-3733 (3Ft dish) with all the K5GNA mods done to it and it
works very
> well.. a Yaesu FT-736r for the radio.  My antennas are up about 35 feet
with AZ &
> EL control (you can see this at www.hamsats.org   under info)..
>
> I hope this helps some..
>
>
>    guy lemke  kd6mtu
>


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