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Re: AMSAT-BB Digest, Vol 1, Issue 1



Schedule 40 & schedule 80 are simply different wall thicknesses for 
pressure ratings. I believe the gray PVC is intended for electrical 
conduit purposes, and it is more resistant to UV, but the color has 
nothing to do with the schedule grade.



> >
>The white stuff can tend to get brittle out in the sun. Painting it 
>will help with this somewhat. My 70cm antenna was modeled after the 
>cheap yagi design and had a white PVC boom that had been painted 
>gray. When lowering the mast to do some rotator maintenance the 
>antenna brushed a nearby dogwood tree that the XYL refuses to let me 
>cut down. The boom snapped right at one of the elements. This could 
>have been brittleness or just the fact of where it struck. I can't 
>comment on the tan (CPVC) pipe as I haven't used it. My
>replacement antenna will be using schedule 80 which is gray in color 
>and much more rigid for the boom.
>73,
>Michael, W4HIJ
>
>
>------------------------------
>
>Message: 7
>Date: Tue, 15 Aug 2006 18:56:47 -0700
>From: James Cottle <jim_cott@earthlink.net>
>Subject: [amsat-bb]  Any 9600 orbital sources up?
>To: amsat bb <amsat-bb@amsat.org>
>Message-ID: <44E27B5F.9080702@earthlink.net>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>Hello there,
>    I am having some difficulty. Are there any amateurs consistently
>receiving 9600 beacons or TLM from either POSAT, ECHO or TECHSAT? It has
>been some time since I heard anything from these. Thanks.
>Jim
>N6FO
>San Francisco
>
>
>------------------------------
>
>Message: 8
>Date: Tue, 15 Aug 2006 21:20:22 -0700
>From: "Zachary Schrempp" <zach.km7i@gmail.com>
>Subject: [amsat-bb]  Some rare Washington grids
>To: amsat-bb <amsat-bb@amsat.org>
>Message-ID:
>         <eab046d0608152120y48e042c8nd19b2e1f4e837e82@mail.gmail.com>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>Hey guys,
>
>I am going over to CN77 on Thursday and Friday. I'll see if I can get
>into CN76, which is one of those grids where just a sliver of it skims
>the coast. Maybe CN86 too. I'll take the Arrow and run on AO-51 and
>SO-50.
>
>73, Zach
>
>--
>Zachary Schrempp, KM7I
>Age 15
>AMSAT #36023
>
>
>------------------------------
>
>Message: 9
>Date: Tue, 15 Aug 2006 20:33:27 -0700
>From: "kc6uqh" <kc6uqh@cox.net>
>Subject: [amsat-bb] Re: Cheap LEO antennas
>To: "Michael Tondee" <mat_62@netcommander.com>, "Joe Kononchik"
>         <kononchik@sbcglobal.net>
>Cc: amsat-bb@amsat.org
>Message-ID: <000801c6c0e4$bcabf3e0$72b7b546@kc6uqh>
>Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>         reply-type=original
>
>Mike,
> >From an electrical point yes, but mechanical strength is poor especilly in
>warm weather.
>
>Art, KC6UQH
>----- Original Message -----
>From: "Michael Tondee" <mat_62@netcommander.com>
>To: "Joe Kononchik" <kononchik@sbcglobal.net>
>Cc: <amsat-bb@amsat.org>
>Sent: Tuesday, August 15, 2006 7:01 PM
>Subject: [amsat-bb] Re: Cheap LEO antennas
>
>
> > Joe Kononchik wrote:
> >> Does anyone know if PVC (Schedule 40) can be used as a substitute for
> >> wood?
> >> _______________________________________________
> >> 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!
> >> http://amsat.org/mailman/listinfo/amsat-bb
> >>
> >>
> >>
> >>
> > The white stuff can tend to get brittle out in the sun. Painting it will
> > help with this somewhat. My 70cm antenna was modeled after the cheap
> > yagi design and had a white PVC boom that had been painted gray. When
> > lowering the mast to do some rotator maintenance the antenna brushed a
> > nearby dogwood tree that the XYL refuses to let me cut down. The boom
> > snapped right at one of the elements. This could have been brittleness
> > or just the fact of where it struck.
> > I can't comment on the tan (CPVC) pipe as I haven't used it. My
> > replacement antenna will be using schedule 80 which is gray in color and
> > much more rigid for the boom.
> > 73,
> > Michael, W4HIJ
> > _______________________________________________
> > 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
> >
>
>
>
>
>------------------------------
>
>Message: 10
>Date: Tue, 15 Aug 2006 21:21:31 -0700
>From: Emily Clarke <emily@planetemily.com>
>Subject: [amsat-bb]  ISS Commander Bill McArthur is AMSAT's Keynote
>         Speaker
>To: amsat-bb@amsat.org
>Message-ID: <7.0.1.0.2.20060815211951.05575a50@planetemily.com>
>Content-Type: text/plain; charset="us-ascii"; format=flowed
>
>
>ISS Commander McArthur to Keynote at AMSAT Symposium
>
>AMSAT is excited to announce that ISS Expedition 12 Commander William
>(Bill) S. McArthur, KC5ACR,  will be the keynote speaker at the 2006
>AMSAT Space Symposium to be held at the Crowne Plaza Hotel in Foster
>City, California, October 6-8, 2006.  Commander McArthur is well
>known to ham radio operators - during his six months aboard the ISS
>he became the most active radio amateur ever to serve in space.
>Commander McArthur logged more than 1800 QSOs, and earned the ARRL
>Worked All States Award. His impressive track record also included a
>record 37 school contacts, Worked All Continents (including
>Antartica) and 130 DXCC entities.
>
>Astronaut McArthur is a veteran of four space flights that include:
>     * STS-58 - October 1993 (Spacelab Life Sciences Mission 2)
>     * STS-74 - November 1995 (Shuttle-Mir Docking Missing 2)
>     * STS-92 - October 2000 (ISS Assembly Mission 3A)
>     * Expedition 12 - October 2005
>In addition Bill has made four spacewalks (two each aboard STS-92 and
>Expedition 12) and was on backup crews of Expeditions 8, 9 and
>10.  He will be featured during the Annual Banquet on Saturday
>evening, October 7, 2006.
>
>The 2006 Space Symposium will be a joint meeting with the ARISS
>International Delegates and will also include the IARU Satellite
>Advisory Panel annual meeting, and a meeting of AMSAT International
>Delegates.   For additional information please visit the AMSAT
>website at http://www.amsat.org. Click on the 2006 Space Symposium
>link in the left side menu.
>
>This year you can register for the Space Symposium online.  Online
>Registration can be found at http://www.amsat-na.com/symposium
>
>
>73,
>
>Emily Clarke, N1DID
>Symposium Chair
>
>
>
>------------------------------
>
>_______________________________________________
>Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
>Not an AMSAT member? Join now to support the amateur satellite program!
>http://amsat.org/mailman/listinfo/amsat-bb
>
>
>End of AMSAT-BB Digest, Vol 1, Issue 1
>**************************************

Thanks,
Robin Midgett K4IDC
615-322-5836 office - rolls to pager
615-835-7699 pager
615-301-1642 home
K4IDC@comcast.net
http://www.people.vanderbilt.edu/~robin.midgett/index.htm 

_______________________________________________
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Not an AMSAT-NA member? Join now to support the amateur satellite program!
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