Yes, I confirm, no noticeable influence here using aluminum tube cross boom with the vhf and uhf yagis fixed in X. Although this may affect if the antenna will be used to other objectives such as terrestrial DX or EME, not because the aluminum cross boom but because of the X position. 73 EdPY2RN
From: Jeff [email protected] To: [email protected] Sent: Friday, March 25, 2016 11:19 AM Subject: Re: [amsat-bb] Fiberglass Poles for Antenna Mounting?
Years ago there was a test report on the differences between metal and plastic crossbooms. It was shown that there is no measurable difference between the two if the antennas are installed with elements 45 degrees from the crossboom. Here is one of the discussions from 2002...
http://www.amsat.org/amsat/archive/amsat-bb/200206/msg00896.html
I had to drive about 160 miles roundtrip to purchase a 2 inch diameter 12 foot solid fiberglass boom that I used to build my Oscar class station in 1997. Now I use the metal crossbooms supplied with my antenna's in my two sat stations. If it really made a measurable difference wouldn't Cushcraft (AOP-1), and M2( Leo pack) used a non metallic boom? Anyway there is plenty of talk about this in the archives, and if your going to use fiberglass I would go with the solid rod as it will last much longer then a tube. I still have mine stored on the ground in NJ, if anyone want's one, it's free.....
73 Jeff kb2m
-----Original Message----- From: Scott Sent: Friday, March 25, 2016 1:52 AM To: [email protected] Subject: [amsat-bb] Fiberglass Poles for Antenna Mounting?
In reading the descriptions of various directional antenna installations, I often see a statement that the last section of mast between the rotator and antenna is non-metallic (most often fiberglass, I believe).
What is the best source for a suitable length of fiberglass pole of the correct size?
I would not be surprised if the source is outside of the radio world... perhaps a round fiberglass pole intended for as a tool handle, for example. Just a guess.
Appreciate any suggestions.
Thanks!
-Scott, K4KDR Montpelier, VA USA _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb