Hi Eric!
Now that's out-of-the-box thinking! hhhmmm . . .
73,
Richard KK6MRH
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Eric Oyen
Sent: Sunday, June 29, 2014 8:17 AM
To: [log in to unmask]
Subject: Re: A Technical Antenna Radiation Pattern Question Concerning Metal
within Walls
well,
if you could find a spot where the chicken wire is exposed, you could = hook
up a small length of wire there, run it into an antenna tuner and =
basically load up the whole building. I did this in an apartment once = and
had loads of fun on HF with it.
-eric
On Jun 29, 2014, at 7:35 AM, Richard B McDonald wrote:
> Hi Colin!
>=20
> this is very helpful, practical information. Sorry your stuff blew-up
>=
when
> the antenna hit a power line : ) And, thanks for the heads-up on the
>antenna deal you mention!
>=20
> 73,
> Richard KK6MRH
>=20
> -----Original Message-----
> From: For blind ham radio operators =
[mailto:[log in to unmask]]
> On Behalf Of Colin McDonald
> Sent: Saturday, June 28, 2014 9:46 AM
> To: [log in to unmask]
> Subject: Re: A Technical Antenna Radiation Pattern Question Concerning
> =
Metal
> within Walls
>=20
> hey richard:
> as was said, theoretically, metal that close to the antenna will =
effect it's
> radiation pattern etc. However, you've still got a whole lot of =
antenna up
> in the clear. You must use ground radials with this particular =
antenna to
> make it work at all though.
> Also, I very strongly recommend not getting the 160 option for the
> matching/tuning box at the bottom. Our club had one of these =
antennas, and
> it worked really quite well with four 65 foot radials at the bottom, =
until
> we added the 160M option...at which poit the antenna became almost =
useless
> on all bands. It worked great from 80 through 6M without that 160 add
> on...until, alas, it bent over in a wind storm and touched a power =
line and
> fried everything including the radio attached to it lol.
> We had it ground mounted on a piece of 1.5 inch pipe driven into the
> ground...the bass was at about 1 foot or so off the ground.
> Anyway, great antenna without the low band thing.
> BTW, S9 antennas are on sale through cheapham.com and their 43 foot =
vertical
> is on sale for a very good price...along with the radial plate and the
> =
other
> various accessories.
> you can score the 43 foot vertical with all hardware for under $200.
>=20
>=20
> 73
> Colin, V A6BKX
> --------------------------------------------------
> From: "Richard B McDonald" <[log in to unmask]>
> Sent: Saturday, June 28, 2014 7:15 AM
> To: <[log in to unmask]>
> Subject: A Technical Antenna Radiation Pattern Question Concerning =
Metal
> within Walls
>=20
>> Hi!
>>=20
>>=20
>>=20
>> For practical reasons (e.g., space issues, zoning restrictions,=20
>>landlord concerns, etc.), I am thinking about putting up a MFJ 43'=20
>>vertical 160 - 6 meter antenna=20
>><http://www.mfjenterprises.com/Product.php?productid=3DMFJ-2990>
>> . This question relates to how metal content within the walls of
>>my=20=
>> house might affect the radiation pattern of this antenna.
>> Basically,=20=
>> I am wondering if my walls will meaningfully interfere with=20
>>transmit/receive operations of this antenna.
>>=20
>>=20
>>=20
>> The walls in my house contain about an inch thick layer of stucco=20
>>which is meshed with chicken wire. This chicken wire is the kind =
with
> about 1.5"
>> holes. On the inside of this is a layer of tarpaper. This
>> tarpaper=20=
>> is secured with metal wire of about 18 gage running horizontally; =
with=20
>> such a wire about every 8' from the bottom to the top of the wall.
>> =20=
>> The rest of the wall is standard 2"X4" and plywood construction.
>> The=20=
>> house was built in 1941. So, it is this chicken wire and tarpaper=20
>>wire I am wondering about.
>>=20
>>=20
>>=20
>> This antenna would be ground mounted about 2' from the wall, and=20
>>secured to the roof's eve overhang per MFJ's installation
>>instruction=20=
>> in the manual.
>> Also, there is a water heater within a metal enclosure that is
>> about=20=
>> 3'WX3'DX7'H that is about 6' away from where this antenna would go.
>> =20=
>> My house is single story; so about two-thirds of the height of
>> this=20=
>> antenna would be above the rooftop.
>>=20
>>=20
>>=20
>> How much might the chicken wire and tarpaper wire mess-up my
>>antenna?=20=
>> What
>> about the water heater?
>>=20
>>=20
>>=20
>> 73 and happy Field Day!
>>=20
>>=20
>>=20
>> Richard KK6MRH=20
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