[amsat-bb] Re: Interference from repeaters

[g.shirville@btinternet.com]

Hi Domenico,

Uum not quite - The Austrian conference paper refers only to repeaters that 
have been established INSIDE the segment of the band allocated to satellite 
operation ie above 145.800MHz.

The RV63 145.7875MHz operation has come as a result of the adoption of 
12.5kHz channel spacing for 2 metre repeaters back in the mid 90's. Before 
that time the highest repeater output frequency  was 145.775MHz - albeit 
with a higher deviation than now of course.

Here in the UK we have seven FM units and one DSTAR unit  on RV63 
http://www.ukrepeater.net/channels/rv63.htm

cheers

Graham
G3VZV


-----Original Message----- 
From: i8cvs
Sent: Tuesday, May 24, 2011 1:03 AM
To: Richard Ferryman ; Amsat - BBs
Subject: [amsat-bb] Re: Interference from repeaters

Hi Dick G4BBH

Same problem in Italy ! This will be discussed during the next IARU Region-1
Conference in Sout Africa upon request from Austria.

73" de

i8CVS Domenico

----- Original Message -----
From: "Richard Ferryman" <g4bbh at btinternet.com>
To: <amsat-bb at amsat.org>
Sent: Tuesday, May 24, 2011 1:37 AM
Subject: [amsat-bb] Interference from repeaters


> I have for some time wondered what was causing a considerable amount or
QRM (S9+60dB) to the ISS downlink on 145.800. It took a while to identify as
there is no CW ident etc. but I have now discovered this is a new D-Star
repeater on our repeater channel RV63  which is 145.7875 MHz, only a couple
of kHz from ISS and inside the doppler shift range.  It seems very poor
planning to place high this powered high sited repeaters so near to the
satellite allocation. Is this becoming a common problem and are repeaters
also causing any problems to uplinks?
> Dick G4BBH
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