I find the whole thing very interesting at least :) On 4/3/10, Mike <m...@aweiowa.com> wrote: > It took a few minutes to get my recording stuff together. I was going to > make a digital recording of the sound to embed here; the wind is up. Guess > what? No sound! The wind is NOW coming from the SE (it's warming up!) and > straight into the pvc pipe. If it is the pipe, then it must take a "cross > wind" to generate the tone. > > > > I hadn't thought about the bottom of the antenna. The sleeve which covers > the N connector IS over an inch in diameter. I guess the next trip up the > tower will include jamming some plumbers putty into all open pipes! LOL > > > > I am glad to be able to provide a little entertainment this Saturday > morning. > > > > Mike > > > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of AJ > Sent: Saturday, April 03, 2010 10:23 AM > To: WISPA General List > Subject: Re: [WISPA] Pan flutes on the tower > > > > Try a second member in the center to properly brace it completely > > vertically, wrap all of the pot metal joints with eletrical tape and hope it > > disappears LOL... > > > > Also look at the bottom of the antenna mount where the coax comes out - this > > is roughly 3 times the size of the coax cable that is bouncing around > > there.. > > > > On Sat, Apr 3, 2010 at 9:19 AM, Mike <m...@aweiowa.com> 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! 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