I was thinking about trying a inverted v in the backyard attached to a
tree. I was going to make some kind of wooden insulator for the middle and
screw that into a tree as high up as I can get on a ladder.

I have a 4 foot drop or so on the back of the house compared to the front.
All my trees are in the back yard. Its sort of like a mini forest. Would a
inverted V still perform well if the top wasnt above my house? I have vinyl
siding so maybe I would be better off just keeping the antenna indoors?

thanks

"Jim noname" wrote:
I was thinking about trying a inverted v in the backyard attached to a
tree. I was going to make some kind of wooden insulator for the middle
and screw that into a tree as high up as I can get on a ladder.

I have a 4 foot drop or so on the back of the house compared to the
front. All my trees are in the back yard. Its sort of like a mini
forest. Would a inverted V still perform well if the top wasnt above my
house? I have vinyl siding so maybe I would be better off just keeping
the antenna indoors?

thanks

Good idea Jim, but I suggest a wrist rocket sling shot and a ball
bearing attached to a string, or your wire when you get the hang
of it. Beware of where it lands.

Once you get it up in the -top- of the tree the tuner needs to be
one you can trust.

Jim;

What are your goals for the antenna? There are several things you need to
realize about using an inverted vee antenna.

First the antenna is highly directional. The main direction of maximum
signal is perpendicular to the plane of the triangle formed by the Vee. If
you want omni directional coverage this is not the antenna you want to use.

Second the impedance, thus the SWR, varies with the angle between the two
wires. An angle of around 90 degrees or more should be used. Smaller angles
will result in a lowering of the feed-point impedance possibility making the
match to a 50 ohm coax line poor. Also as the angle varies the required
length will change for resonance. Also as the angle decreases the frequency
range over which you will get an acceptable match will also tend to decrease
too.

Third you may have problems with RF energy getting back in to the radio. The
general fix for this is to install some ferrite toroids at the feed-point on
the coax cable, or coiling up a number of turns of coax at the same
location. You can try 6 to 12 turns in a coil about 6 inches in diameter and
taped to hold the loop in shape.

Finally the point of maximum signal radiation from the antenna is at the
feed-point. Getting the feed-point as high up as you can will improve the
signal.

--
Leland C. Scott
KC8LDO

Wireless Network
Mobile computing
on the go brought
to you by Micro$oft


"Jim noname" wrote in message
news:6_Wrc.8907$af3.502893@attbi_s51...
I was thinking about trying a inverted v in the backyard attached to a
tree. I was going to make some kind of wooden insulator for the middle and
screw that into a tree as high up as I can get on a ladder.

I have a 4 foot drop or so on the back of the house compared to the front.
All my trees are in the back yard. Its sort of like a mini forest. Would
a
inverted V still perform well if the top wasnt above my house? I have
vinyl
siding so maybe I would be better off just keeping the antenna indoors?

thanks

"Leland C. Scott" wrote:
Jim; What are your goals for the antenna?

I'd guess they are bigger than the external cell phone antenna that you
have up illegally at your motel, nad.

--
again i ask, wtf?

In 6_Wrc.8907$af3.502893@attbi_s51, "Jim noname"
wrote:

I was thinking about trying a inverted v in the backyard attached to a
tree. I was going to make some kind of wooden insulator for the middle and
screw that into a tree as high up as I can get on a ladder.

I have a 4 foot drop or so on the back of the house compared to the front.
All my trees are in the back yard. Its sort of like a mini forest. Would a
inverted V still perform well if the top wasnt above my house? I have vinyl
siding so maybe I would be better off just keeping the antenna indoors?

thanks



Not much point in putting up an outside antenna if you can't get it in
the air. Like Mopar suggested, use a sling-shot and a fishing weight
to get it as high as you can. Don't worry about the shape so much as
the height. You won't be able to trim the elements after it's in the
tree so you will need a tuner in the shack. You can get a cheap MFJ
for about $20 that will work just fine. And since you are putting it
in the trees, impedance isn't going to be anywhere near what you might
predict, which is another reason to use the tuner. Also, I suggest
using balanced twinlead instead of coax for your transmission line
because it's cheaper, because the antenna system will be easier to
tune, and because RF grounding at the radio is not as important as
when the transmission line is unbalanced. Just don't forget a good
lightning ground!





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"Jim noname" wrote in message
news:6_Wrc.8907$af3.502893@attbi_s51...
I was thinking about trying a inverted v in the backyard attached to a
tree. I was going to make some kind of wooden insulator for the middle and
screw that into a tree as high up as I can get on a ladder.

I have a 4 foot drop or so on the back of the house compared to the front.
All my trees are in the back yard. Its sort of like a mini forest. Would
a
inverted V still perform well if the top wasnt above my house? I have
vinyl
siding so maybe I would be better off just keeping the antenna indoors?

thanks

If your going to do it, get it above the house.
Vinyl siding or not, the house will block part of
the antenna.
Why not use one of the tree's, mount an antenna
on the top? That would put it well above the house
and give you better performance.

Landshark


--
That does suck..sometimes you're the
windshield..sometimes you're the bug.

"Jim noname" wrote in message
news:6_Wrc.8907$af3.502893@attbi_s51...
I was thinking about trying a inverted v in the backyard attached to a
tree. I was going to make some kind of wooden insulator for the middle and
screw that into a tree as high up as I can get on a ladder.

I have a 4 foot drop or so on the back of the house compared to the front.
All my trees are in the back yard. Its sort of like a mini forest. Would
a
inverted V still perform well if the top wasnt above my house? I have
vinyl
siding so maybe I would be better off just keeping the antenna indoors?

thanks

Jim,

Just get a good antenna tuner and get the thing as high off the ground as is
practical. Many years ago, I used a long wire antenna. The thing went from
the house to a tree and then from tree to tree. It was several hundred feet
long and was fed against a multiple ground. All 8 gauge wire and it
performed like gangbusters.

Any antenna that is fairly long (multiple wavelengths of the signal) will be
fairly directional. I know I had good signal reports from Norway, Sweden,
Denmark, and Italy, but never got a good signal report from England. Just
so-so.

Best regards from Rochester, NY
Jim


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"Steveo" wrote in message
...
"Leland C. Scott" wrote:
Jim; What are your goals for the antenna?

I'd guess they are bigger than the external cell phone antenna that you
have up illegally at your motel, nad.

Actually I have five antennas in total setup. The virtue of V/UHF antennas
is they don't have to be big to have high gain.

--
Leland C. Scott
KC8LDO

Wireless Network
Mobile computing
on the go brought
to you by Micro$oft