Could the big stick possibly be vibrating at the frequencies you're hearing?
You sure it's not the wire antenna you're hearing or guy wires or something? Greg On Apr 3, 2010, at 10:49 AM, Mike wrote: > Wind through that short piece of pvc was my first suspect. But, Bernouli > effect asside, wouldn't a single "pan flute" create a single tone? There > are 4 distinct tones! It really does play this eerie melody. > > Mike > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Brian Webster > Sent: Saturday, April 03, 2010 10:11 AM > To: 'WISPA General List' > Subject: Re: [WISPA] Pan flutes on the tower > > When I ran a tower construction company, the crews used to tape over the > ends of pipes when they were on top of the truck going to a job site. They > said the noise from the wind blowing through them would drive them crazy > while going down the road... > > > > Brian > > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] 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: wireless@wispa.org > > 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: wireless@wispa.org > > 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: wireless@wispa.org > > 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: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
