If the rope goes through that PVC and the wind is blowing, the rope would move changing the shape inside the pipe or the surface over the ends of the pipe thus altering the tone.
Brian -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mike Sent: Saturday, April 03, 2010 9:52 AM To: 'WISPA General List' Subject: [WISPA] Pan flutes on the tower 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/
