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Re: [SPAM] Re: Re: [SPAM] Re: AO51 Signals



It is more striking than that because if you are starting with an SNR 
of 2-3 dB that buries your signal totally  (i.e.  a minus S4; meter 
don't bend in that direction).  With V and H polarity you will never 
be more than -3 dB (half an S-unit) down.

Ed - KL7UW

At 06:50 AM 12/21/2007, Andrew Rich wrote:
>Thats interesting about the affect of wrong polarisation - 20dB
>
>According to my other info here that is about S4 to S7 difference.
>
>
>
>
>----------------------------------------------------------------------------
>Andrew Rich VK4TEC
>vk4tec@people.net.au <mailto:vk4tec@people.net.au>
>http://www.tech-software.net
>
>
>
>
>-----Original Message-----
>From: Andrew Glasbrenner [mailto:glasbrenner@mindspring.com]
>Sent: Saturday, 22 December 2007 12:44 AM
>To: vk4tec@people.net.au; amsat-bb@amsat.org
>Subject: [SPAM] Re: [amsat-bb] Re: [SPAM] Re: AO51 Signals
>Importance: Low
>
>
>AO-51 is LHCP on 435.150, RHCP on 435.300, and linear on 2401.200. If your
>helix is LHCP and you are listening to the .300 voice downlink, you are in
>the neighborhood of 20db down from a RHCP helix.
>
>73, Drew KO4MA
>
>----- Original Message -----
>From: "Andrew Rich" <vk4tec@people.net.au>
>To: "Jeff Mock" <jeff@mock.com>; <amsat-bb@amsat.org>
>Sent: Friday, December 21, 2007 6:20 AM
>Subject: [amsat-bb] Re: [SPAM] Re: AO51 Signals
>
>
> > Does ao-51 have circular ?
> >
> > I have LHCP on my antenna
> >
> >
> >
> > --------------------------------------------------------------------------
>--
> > Andrew Rich VK4TEC
> > vk4tec@people.net.au <mailto:vk4tec@people.net.au>
> > http://www.tech-software.net
> >
> >
> >
> >
> > -----Original Message-----
> > From: Jeff Mock [mailto:jeff@mock.com]
> > Sent: Friday, 21 December 2007 9:16 PM
> > To: vk4tec@people.net.au; amsat-bb@amsat.org
> > Subject: [SPAM] Re: [amsat-bb] AO51 Signals
> > Importance: Low
> >
> >
> > The RG-213 loss should be less than 3dB if I remember correctly, I think
> > you're okay there.  Did you twist the helix the right direction?
> >
> > jeff
> >
> >
> > Andrew Rich wrote:
> >> Hello
> >>
> >> I built a 10 turn helix for 435 MHz.
> >>
> >> I have 15 meters of RG-213.
> >>
> >> Radio is an ICOM 706 mkii G
> >>
> >> I am not getting strong signals like I would have expected ?
> >>
> >> Can someone share their setups and signal strengths ?
> >>
> >> Maybe a pre-amp might help ?
> >>
> >> Am I getting too much loss in the cable ?
> >>
> >>
> >> -------------------------------------------------------------------------
>-
> > --
> >> Andrew Rich VK4TEC
> >> vk4tec@people.net.au
> >> http://www.tech-software.net
> >>
> >>
> >> _______________________________________________
> >> Sent via AMSAT-BB@amsat.org. 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
> >>
> >
> >
> > _______________________________________________
> > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
> > Not an AMSAT-NA member? Join now to support the amateur satellite program!
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>
>
>_______________________________________________
>Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
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73,
Ed - KL7UW
======================================
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144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
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