LaRoy: (and others) Thanks for your analysis and feedback. The more I look, listen and observe, the more I believe you guys have found the melodic culprit.
When I put up the amateur antenna, a new backhaul was put up during the same time period. I built that mount with a 2 inch piece of galvanized pipe. So, I am counting open ends of open pipes and the math adds up to a four part melody. The next trip up the tower will see duty capping all ends of all open pipes. I just hope the sound doesn't affect growth of my asparagus or morel mushrooms in the meantime. LOL For you amateur radio operators and armchair SWLers, that 900 foot long wire (actually an inverted Vee) with the apex at 160 feet, coupled to one of these http://rfspace.com/RFSPACE/SDR-IQ.html is beyond compare! The NDB band is a solid band of colors. Even LW signals from Europe come pounding in regularly. Friendly Regards, Mike Mike Gilchrist Disruptive Technologist Advanced Wireless Express P.O. Box 255 Toledo, IA 52342 239.770.6203 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Data Technology Sent: Monday, April 05, 2010 11:04 AM To: WISPA General List Subject: Re: [WISPA] Pan flutes on the tower I bet if you cap the ends it will quit whistling. I have the same problem on one of my towers. I have a 1.5" dia pipe as a standoff and it will make sounds when the wind blows. I was up there on a windy day once and I could put my hand over the top of the pipe and it would quit whistling. LaRoy McCann Data Technology Mike wrote: > A while back, the amateur community talked me into putting a ham antenna on > my highest tower. It is a dual band 2 meter 70 cm DC grounded unit (as per > my specs). I built a mount which offsets the stick a couple feet from the > tower. A piece of 1 inch PVC through which I passed a piece of poly rope is > attached with stainless hose clamps near the top of the stick to lasso the > 17 foot stick to keep it from swaying. > > > > A couple times this winter when I was outside, I heard this eerie melodic 4 > part tone. It sounded like someone blowing across Pan flutes. Now that > spring has sprung, every time the wind blows, there is this tune again. > While I questioned my sanity this winter, I do think it is coming from the > amateur antenna. > > > > Although the sound is somewhat melodic and not objectionable, I fear this > summer with windows open in the house, it will keep me up at night. I have > this fear it will be like when I first put that tower up and put a 10 foot > by 20 foot flag at the top to raise awareness in the community. It snapped > so loud it would wake you from a sound sleep. One of my best nights was > when that flag finally came down. > > > > Since everything was done per my requests, and I want to maintain my stead > with the amateur community, how does one keep that stick from making those > noises? I am hoping someone here has encountered something similar and has > a resolve. > > > > Regards, > > > > Mike > > > > ---------------------------------------------------------------------------- ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- ---- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
