Steve, you are right. The caffeine had not kicked in yet when I wrote
that one.
-----
BRETT WINCHESTER
[log in to unmask]
208-639-8386
###
-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Steve
Sent: Monday, May 14, 2007 10:42 AM
To: [log in to unmask]
Subject: Re: off topic fm and am antanna help
Um, not quite, Brett. How about 300 million divided by Frequency in hz?
= That gets you the length of a full-wave i.e. 300 million divided by =
7500000 gives you 40 meters; which is 7.5Mhz.=20
If you divide 300 by the frequency in Megahertz, you'
ll get the same result. That is, you'll get the wavelength in meters.
= For the FM band, with a center frequency of 98Mhz, you'd have 3.061224
= Meters, which is 10 feet .5 inches.
Steve, K8SP
----- Original Message -----=20
From: Brett Winches=20
To: [log in to unmask]
Sent: Monday, May 14, 2007 10:15 AM
Subject: Re: off topic fm and am antanna help
The basic antenna formula will get you close 300000000/frequencey MHZ
and than do the metric to English conversion if needed. Otherwise, do
the 468 over frequency. =3D20
-----
BRETT WINCHESTER
[log in to unmask]
208-639-8386
###
-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Pat Byrne
Sent: Sunday, May 13, 2007 11:18 AM
To: [log in to unmask]
Subject: Re: off topic fm and am antanna help
An antenna cut to frequency is just that, I would venture. So, HDTV =
is
more than likely a marketing strategy.
Simple is good; I would use a folded dipole, about forty inches on a
side, made of 300 ohm feed line, and fed with the same feedline. =
Simple
and inexpensive.
Good luck.
Pat, K9JAUAt 10:37 AM 5/13/2007, you wrote:
>some one also recommended a hd tv antanna would this work as well?
>thanks
>Hank
>----- Original Message -----
>From: "Ken" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Sunday, May 13, 2007 5:01 AM
>Subject: Re: off topic fm and am antanna help
>
>
> > Hi Hank, I've done much reading on this subject of improving =
fm=3D20
> > reception with an indoor antenna. As you already learned, =
amplified
> > antennas don't work. I also tried the BesBuy indoor active Terk =
fm
tower with no luck.
> > I
> > really don't think you can do much better than the good old =
rabbit=3D20
> > ears antenna for indoor antennas. The trick to using one of =
these=3D20
> > antennas is getting the right location and orientation. On =
some=3D20
> > stations just moving the elements an inch or so will cause me =
to=3D20
> > lose my station. Also try setting the elements to about a 40 =
degree
> > angle and then tip the setup in the direction that gives the =
best=3D20
> > signal. If you can get the rabbit ears into a crawl space in to
the attic this might help.
> >
> > Try a loop. Length is 1005/Freq in Mhz (about 10 feet for fm). =
=3D20
> > Connect the ends of the wire to the 300-ohm side of a 300 to 75 =
ohm=3D20
> > balun.
> >
> > Below I've listed a couple of antennas I'm researching, but have =
not
> > tried.
> > They are both really just dipoles but these antennas are =
often=3D20
> > mentioned in the audiophile articles I like to read.
> >
> > The Silver Ribbon Antenna by Magnum Dynalab The SR-100 (I think =
it's
> > about $35 if you can find one) A high-efficiency indoor antenna =
that
> > is ...
> > . Continuously tunable across the FM dial to maximize reception, =
.=3D20
> > Rotatable for best station orientation.
> > . Designed to complement just about any FM system arrangement.
> > . Receives local HDTV signal with ease due to its UHF design.
> > . Directionality helps in solving problems due to multi path=3D20
> > interference
> >
> >
> > And then Ccrane has a $35 dipole (I think it's just an =
off-center=3D20
> > fed dipole), but it might be worth a try. About $35.
> >
> >
> > Good luck,
> > 73, Ken -N5SWR
> >
> > -----Original Message-----
> > From: For blind ham radio operators=3D20
> > [mailto:[log in to unmask]]
> > On Behalf Of hank smith
> > Sent: Saturday, May 12, 2007 6:49 PM
> > To: [log in to unmask]
> > Subject: off topic fm and am antanna help
> >
> >
> > Hello.
> > I am trying to pull in some week signals out of seattle wa =
from=3D20
> > olympia wa.
> > I am running a boston acoustics recepter currently I am using a =
pair
> > of rabbit ear tv antanna's in the horzontal possission and am=3D20
> > getting a little better results but I am needing a bit more=3D20
> > recieving power on fm and I am also needing some am =
recommendations.
> > I purchased a amplified am/fm antanna from terk for 30 dollars =
from=3D20
> > best buy
> >
> > and it was the worst performming antanna that was amplified I ran
= in
> > to even
> >
> > with the amp maxxed, it had a amp dial that you could adjust.
> > any recommendations for indoor use that I can purchase at a local
store?
> > either from radio shack best buy or some other place?
> > thanks
> > Hank
> >
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.5.467 / Virus Database: 269.6.8/800 - Release =
Date:=3D20
> > 5/11/2007
> > 7:34 PM
> >
> >
> > No virus found in this outgoing message.
> > Checked by AVG Free Edition.
> > Version: 7.5.467 / Virus Database: 269.6.8/800 - Release =
Date:=3D20
> > 5/11/2007
> > 7:34 PM
> >
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