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CX2SA > SATDIG 22.11.12 21:02l 150 Lines 4399 Bytes #999 (0) @ WW
BID : AMSATBB7387
Read: GUEST
Subj: AMSAT-BB-digest V7 387
Path: IZ3LSV<IV3YXW<HB9TVW<DB0ANF<CX2SA
Sent: 121122/2002Z @:CX2SA.SAL.URY.SA #:743 [Salto] FBB7.00e $:AMSATBB7387
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Who is using a IC-910 with Maspro Antennas? (i8cvs)
2. Consat-1 presentation video + KN-SAT1 CubeSat video (Trevor .)
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Message: 1
Date: Wed, 21 Nov 2012 21:09:13 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "PE0SAT | Amateur Radio" <pe0sat@xxxxx.xx>, "Dimitry Borzenko"
<dibor@xxxxx.xxx>
Cc: Amsat bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Who is using a IC-910 with Maspro Antennas?
Message-ID: <000d01cdc824$143afb40$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Jan, PA0SAT
Your problem with VO-52 ,uplink 435 MHz and downlink 145 MHz
is not due obviously by armonics but by 435 MHz overloading the
IC-910 receiving 145 MHz because probably this tranceiver has a
lover 1 dB compression point at 144 MHz in comparison to a FT-847
and so it is more subject to intermodulation.
Since you do not have problems using the same Maspro antennas and
a FT-847 the only one to be cured is the IC-910
I suggest you to try a duplexer with the antenna connected to the
common and the 2 meter port connected to the IC-910 while the
70 cm port is closed into a 50 ohm termination.
The 2 meter section act as a low-pass filter and the 70 cm port as
a high-pass filter while the 50 ohm termination dissipates the
435 MHz signal.
73" de
i8CVS Domenico
----- Original Message -----
From: "PE0SAT | Amateur Radio" <pe0sat@xxxxx.xx>
To: "Dimitry Borzenko" <dibor@xxxxx.xxx>
Cc: "Amsat bb" <amsat-bb@xxxxx.xxx>
Sent: Wednesday, November 21, 2012 6:03 PM
Subject: [amsat-bb] Re: Who is using a IC-910 with Maspro Antennas?
> Hi Dimitry,
>
> I know of this filter, but these are for working FO-29 when the uplink
> is 145 and the downlink 435.
>
> The Harmonics produced by the 145 uplink signal interfere with the 435
> downlink. Now I experience the
> same with VO-52 but there the uplink 435 and the donwlink 145 ???
>
> So why is the 435 uplink interfering with the 145 downlink ????
>
> Could this be a harmonic problem???
>
>
> 73 Jan PE0SAT
>
> On 21-11-2012 17:06, Dimitry Borzenko wrote:
> > Hello Jan.
> >
> > Try "Desense" filter.
> > More info here - http://www.amsat.org/amsat-new/articles/Mode-J/
> >
> > Regards.
> >
> >
> > -----Original Message-----
> > From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx
> > On
> > Behalf Of PE0SAT | Amateur Radio
> > Sent: Tuesday, November 20, 2012 8:12 PM
> > To: Amsat bb
> > Subject: [amsat-bb] Who is using a IC-910 with Maspro Antennas?
> >
> > Hi,
> >
> > Thanks for reading this message. I have exchanged my FT-847 for an
> > IC-910H and now when I try to
> > work VO-52 my UHF uplink signal interferes with the VHF downlink. Are
> > the any people out there that
> > experience the same with this combination?
> >
> > I tried with and without pre-amp, RHCP and LHCP but the problems
> > doesn't go away :(
> >
> >
> > I do know that there can be problems when working FO-29 and a mode-j
> > filter can solve this, but I
> > never experiences this when working VO-52.
> >
> >
> > 73 Jan PE0SAT
>
> --
> With regards PE0SAT
> Internet web-page http://www.pe0sat.vgnet.nl/
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Wed, 21 Nov 2012 20:22:01 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Consat-1 presentation video + KN-SAT1 CubeSat
video
Message-ID:
<1353529321.26160.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
A CubeSat?s Road from University to Space
http://www.uk.amsat.org/?p=11563
KN-SAT1 Prototype Subsystems Design and Testing
http://www.uk.amsat.org/?p=11550
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
----
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 7, Issue 387
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