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Re: Fw: Polarphaser ph2/s



Hi Howard and Domenico thanks for the thoughts.  I had a look inside one and 
saw the track layout which to me looked very interesting. I suppose it sends 
each signal along a longer/shorter path to change the signal phase.
I thought at the time that if it worked at 2m it should work at 70cm but it 
never is "that" simple!
So I'm thinking possibly shorten the tracks to a suitable length for 70cm? 
I have no idea how to work this one out, where is a good place to find the 
information I need on phasing like this?
I have no schematic for the unit but I can take a high res picture or two 
and send on if you wanted to take a look?
Thanks for all and any help.
Paul.
2E0SCI



----- Original Message ----- 
From: "Howard Long" <howard@howardlong.com>
To: "Paul Luggar" <luggsey@hotmail.com>; "Amsat-Bb@Amsat.Org" 
<amsat-bb@amsat.org>
Sent: Tuesday, June 28, 2005 11:52 AM
Subject: RE: [amsat-bb] Fw: Polarphaser ph2/s


> Hi Paul
>
> These would be great - except that they are shack located, not mast 
> mounted,
> so you can't use a single preamp with them.
>
> Inside they are simply a variable delay line etched onto PCB. I have not
> used one on 70cm to see how well it matches, but essentially you could use
> it on 70cm but instead of one rotation equivalent to a complete phase 
> change
> on 2m, you would achieve three complete phase changes on 70cm.
>
> 73, Howard G6LVB
>
> -----Original Message-----
> From: owner-AMSAT-BB@amsat.org [mailto:owner-AMSAT-BB@amsat.org]On
> Behalf Of Paul Luggar
> Sent: 27 June 2005 22:10
> To: Amsat-Bb@Amsat.Org
> Subject: [amsat-bb] Fw: Polarphaser ph2/s
>
>
> ----- Original Message -----
> From: Paul Luggar
> To: Amsat-Bb@Amsat.Org
> Sent: Sunday, June 26, 2005 11:35 PM
> Subject: Polarphaser ph2/s
>
>
>
> Hi all, does anyone in the group know much about these?  I want to know if 
> a
> 2m one can be used/adapted for 70cm?
> I can go into more detail off list with pics etc if anyone can help.
> 73
> Paul.
>
> 2E0SCI
>
>
>
>
>
>
>
> Amsat UK member 6484
> Take a look at my website
> <www.luggsey.demon.co.uk/2e0sci/website/home.html>
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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----
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