Guys, I want to upgrade from my hand held Arrow to something permanently mounted outside with and Ele/ Az rotor. I have a single story home with roof peak at about 22 feet. I can easily mount a 10' - 20' mast directly outside the shack anchored in concrete and bolted to my roof eaves. If I use two masts sections I will get a net height of about 17' which means I will be "looking" through my roof on the lower easterly orientated passes. Gaining the additional height to completely clear the roof line will be increasingly problematic. How much should I be concerned about this, etc? I'd like some real world feedback / suggestions. Thanks in advance. 73 de harry, W6DXO
Harry,
Have you considered a roof tower? I put up one 20+ years ago, and have been very satisfied with it. The model I have has a built in ladder, which makes access to the components easy. The antennas obviously clear the house, and all but the tallest trees. How tall a tower depends on the longest length of antenna you plan to install. They are easy to install on a shingle or similar roof, not so easy on a Spanish style or shake roof. I have used somewhat sturdier anchors than are usually recommended.
Alan WA4SCA
My antenna height philosophy goes like this-I try get away with as much as I can get away with considering, cost, XYL attitude, powerlines, falling on neighbors. The idea of, "just one more foot" can go on forever. My roof line already looks like a NASA facility.
73 Bob W7LRD
----- Original Message ----- From: harry@gunship.org To: "AMSAT" amsat-bb@amsat.org Sent: Saturday, July 11, 2009 1:19:25 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] Antennas: How High?
Guys, I want to upgrade from my hand held Arrow to something permanently mounted outside with and Ele/ Az rotor. I have a single story home with roof peak at about 22 feet. I can easily mount a 10' - 20' mast directly outside the shack anchored in concrete and bolted to my roof eaves. If I use two masts sections I will get a net height of about 17' which means I will be "looking" through my roof on the lower easterly orientated passes. Gaining the additional height to completely clear the roof line will be increasingly problematic. How much should I be concerned about this, etc? I'd like some real world feedback / suggestions. Thanks in advance. 73 de harry, W6DXO _______________________________________________ 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
Hi John,
You might consider putting a short tripod on the roof itself. That's what I did. 2-story house, and too many trees adjacent to the house to put up any sort of tower (and not counting the inevitable XYL objections).
Here's what I did: http://home.wavecable.com/~ko6th/IMG_0141b6.jpg It basically just sits on the roof, and is kept from sliding by being anchored to a vent pipe. The base is 8' wide, with a 4' "T" piece going up to the pipe. The vertical part is about 6' tall, which gives the tail of the 70cm beam just enough clearance from the roof for overhead passes. Never had a problem with stability.
Good luck,
Greg KO6TH
Date: Sat, 11 Jul 2009 13:19:25 -0700 From: harry@gunship.org To: amsat-bb@amsat.org Subject: [amsat-bb] Antennas: How High?
Guys,
I want to upgrade from my hand held Arrow to something permanently mounted outside with and Ele/ Az rotor.
I have a single story home with roof peak at about 22 feet. I can easily mount a 10' - 20' mast directly outside the shack anchored in concrete and bolted to my roof eaves.
If I use two masts sections I will get a net height of about 17' which means I will be "looking" through my roof on the lower easterly orientated passes. Gaining the additional height to completely clear the roof line will be increasingly problematic. How much should I be concerned about this, etc?
I'd like some real world feedback / suggestions.
Thanks in advance.
73 de harry, W6DXO
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
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participants (4)
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Alan P. Biddle -
Greg D. -
harry＠gunship.org -
w7lrd＠comcast.net