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Now that I am a homeowner again I have the chance to put up a decent
outdoor directional antenna for my Magnum md106t(Just had it upgraded).I had purchased the Delhi Qfm 9 quite a while ago.I am thinking of mounting this on my chimney because of cost considerations.A tower would be much more money but would give a bit more height.How much antenna height do I really need.Will a chimney
mount be plenty high enough or would the extra money for a tower be
significantly better.I will also be installing a rotator as well with
either setup.
Follow Ups:
Viz-|----|(outer brick house-wall)
you then clamp the mast to them, see left I used three such stand off mounts!!! and they are on alternate sides of the mast, which is 2 inch, and etc*, fencing pipe, *telescoped for strength. so it is VERY heavy cf most home/TV masts.
I have winds of up to 90mph coming from the great Southern Ocean / the Roaring Forties, and it ain't come down yet! 'kay?
And the mast is accessible - IE run down into the ground! I put a vertical PVC pipe in the ground beneath mine, to lower it into, so as to be able to reach the biggest and very top (FM!) antenna while standing on the roof - near the gutters.
WarmestTimbo in Oz
The Skyptical Mensurer and Audio Scrounger'Still not saluting.'
Read about and view system at:
nt
Duane,I agree, higher is better. However, are you interested in pulling in distant stations? I live just south of Chicago and have usable stations in all directions. That's where the rotor and directional antenna help me. Jumping to a tower would be a big increase in cost. My chimney mount anrenna is by no means low. The mast I use is about 10 feet long which places the antenns and rotor over 7 feet above the chimney top. At the very least this means the antenna is "looking" over the tops of all the nearby homes. The extra height distances the antenna a bit from possible RFI coming from within my house and keeps everything well away from any chimney smoke.
I use the Radio Shack directional FM antenns (15-2163) with a very inexpensive rotor from MCM. It feeds my Yamaha T-85 tuner.
Yes I agree.To go to a tower is quite expensive and I don,t think I
would gain that much mor height.Maybe 7-10 feet.Is that substantial enough to warrant the additional expense?I live right near the border
between Niagara falls New York and Niagara Falls Canada.All the
main stations in this area are from buffalo or Toronto.I am blessed
with TWO public funded stations.One from each area,both have splendid
sound quality.The station form Buffalo turns it,s signal down at
night and it is more difficult to receive quietly at night.I am hoping that the yagi with additional height and a rotator will help
this.What would you consider a distant station.How many miles?
As high as possible is the rule, so above your roof's highest ridge is as high as I'd go, and perhaps not.Antenna connections and cable don't like VERY hot smoke full of tars and stuff, just my experience at othger people's homes. I'd guess that the rotator ain't gonna like it much either.
We still have wood fires down here, mostly slow combustion types.
WarmestTimbo in Oz
The Skyptical Mensurer and Audio Scrounger'Still not saluting.'
Read about and view system at:
My brick chimney is used on my natural gas furnace.Is that type of smoke clean enough or would it still be a problem? A chimney mount
would get my antenna above any roofs in the area but there are some
quite tall trees around.Are these problematic?
to allow breezes to work, to remove most of the smoke, and reduce the ambient temperature around the balun if any. That's the thing that let's you use coax instead of ribbon.That IS cleaner smoke, TWIWTAbout - if any! ;-)!
If I were you, given that US winters CAN be ferocyous, I'd talk to an expert local installer - about sealing the antenna terminals / connectors with a spray - like the blue or yellow stuff for car battery terminals.
And self-amalgamating tape may be of use, too.
WarmestTimbo in Oz
The Skyptical Mensurer and Audio Scrounger'Still not saluting.'
Read about and view system at:
1.5 meters above the chimney top is no problem to achieve.I just
wanted to know if there was any advantage to spending the extra
coin to get it up even a little higher yet.Do trees cause any problems?I have purchased a chimney mount kit to mount a mast on the chimney.$20.00.One guy I talked to the other day in a hi Fi shop
claims that every five feet up is a further improvement.This guy is
using a 75ft antenna.That strikes me as overkill.What do you think?
IE2-4 wavelengths at 100Meg, the band centre, then there may be a problem,As in |-|-| - > / \
OTOH I used to have a tree <12 metres away, and it wasn't an issue, it isn't there now.on that front, has anyone planted a potentially large tree nearby, as well?
so, extra height is always worth having,
usually there are mast extenders which fit 'over' the end of your basic mast tube, with fixings.
You may want to consider guying the thing, if you go that far.
My heavy but strong and TALLLL mast isn't, yet, three stand off tubes is the reason I reckon. I did BUY a guying kit, avec turnbuckles etc. yrs ago -;-)! Hard to measure the guy wire 'lengths' safely.
YMMV as you'll have the roof underfoot!
And, I now realise I could use Pythagoras for this task!!!!
WarmestTimbo in Oz
The Skyptical Mensurer and Audio Scrounger'Still not saluting.'
Read about and view system at:
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