Antenna advice?
 

Ron wrote:
Hi

I have a 50 ft tower just ready to throw up something to operate.

Cost is the problem but I have a lot of parts to build. I want to put up a
dipole (I have a manual all band tuner) and my question is should feed it
with ladder line or feed it with coax and then run each leg about 68 ft .

Second idea is I have an old aluminum omni antenna that used to have 3
traps
within it, however at that height it will come down quickly as this antenna
is meant to be on the ground (no ground planes) so I want to make this omni
as long as practically possible and tune it to utilize it as best possible.

Any suggestions? This is really all I have to work with. Only want to climb
this thing a couple times and hope its good for the winter.

Thanks
73s

Ron

Seeing you have a tuner, I would go with an 80 meter dipole fed with the
ladder-line. One antenna for all the bands 80 thru 10. FWIW

Antenna advice?
 

Jack Pagel wrote:


Seeing you have a tuner, I would go with an 80 meter dipole fed with the
ladder-line. One antenna for all the bands 80 thru 10. FWIW

Tossing out another option....

I once used a "quarter-wave sloper" off of a grounded 50 foot tower.
Tower was used as a "ground plane". It did a very convincing job for DX
on 40 m and was somewhat directional.

Having multiple antennas is always a bonus. Add one of these to your
antenna switch!

-Bill WX4A

Antenna advice?
 

Bill M wrote:
Jack Pagel wrote:


Seeing you have a tuner, I would go with an 80 meter dipole fed with
the ladder-line. One antenna for all the bands 80 thru 10. FWIW

Tossing out another option....

I once used a "quarter-wave sloper" off of a grounded 50 foot tower.
Tower was used as a "ground plane". It did a very convincing job for DX
on 40 m and was somewhat directional.

Having multiple antennas is always a bonus. Add one of these to your
antenna switch!

-Bill WX4A

Or...skip the HF antennas and put up a converted 18" DirecTV dish and
get on 10 GHz. At ground level and 2W, I made a 180.5 mile QSO during
the 10 GHz and Up contest last month. Didn't even break a sweat ;)

Scott
N0EDV

Antenna advice?
 

In article , " Ron" wrote:

Hi

I have a 50 ft tower just ready to throw up something to operate.

Cost is the problem but I have a lot of parts to build. I want to put up a
dipole (I have a manual all band tuner) and my question is should feed it
with ladder line or feed it with coax and then run each leg about 68 ft .

Second idea is I have an old aluminum omni antenna that used to have 3 traps
within it, however at that height it will come down quickly as this antenna
is meant to be on the ground (no ground planes) so I want to make this omni
as long as practically possible and tune it to utilize it as best possible.

Any suggestions? This is really all I have to work with. Only want to climb
this thing a couple times and hope its good for the winter.

• RON -- I would install a pulley on a short arm at the top of the tower
so that I could rig a halyard to raise and lower the middle of an
inverted-V antenna wire. One end of the wire is the feed point (fed
against gnd) and the unfed end has an insulator and a tie off to a point
at least 7' above ground. The feed point Z can be up to several
kilo-ohms, so an L-network is used to match the feed Z to 50-ohms. A
remote controlled L-network is a good way to go. When this antenna is a
half-wave, it's called a Hertz antenna and it acts like a plain-vanilla
halfwave inverted V dipole -- but with the advantage that it can be tuned
to work on any frequency for which the wire length is at least 0.2
wavelengths.
- notes - Hertz antennas have an advantage in the Winter since the
feedline is not up in the air. /// The most durable antenna wire is
braided phosphor bronze, #22 will easily carry 1500W. /// when viewed
from above the wire must be pretty much is a straight line and not fold
back on itself.
------Rich, AG6K

--
R.L. Measures. 805-386-3734, www.somis.org

Antenna advice?
 

On 28/06/10 13:23, •R. Measures. AG6K wrote:
In , " wrote:

Hi

I have a 50 ft tower just ready to throw up something to operate.

Cost is the problem but I have a lot of parts to build. I want to put up a
dipole (I have a manual all band tuner) and my question is should feed it
with ladder line or feed it with coax and then run each leg about 68 ft .

Second idea is I have an old aluminum omni antenna that used to have 3 traps
within it, however at that height it will come down quickly as this antenna
is meant to be on the ground (no ground planes) so I want to make this omni
as long as practically possible and tune it to utilize it as best possible.

Any suggestions? This is really all I have to work with. Only want to climb
this thing a couple times and hope its good for the winter.

• RON -- I would install a pulley on a short arm at the top of the tower
so that I could rig a halyard to raise and lower the middle of an
inverted-V antenna wire. One end of the wire is the feed point (fed
against gnd) and the unfed end has an insulator and a tie off to a point
at least 7' above ground. The feed point Z can be up to several
kilo-ohms, so an L-network is used to match the feed Z to 50-ohms. A
remote controlled L-network is a good way to go. When this antenna is a
half-wave, it's called a Hertz antenna and it acts like a plain-vanilla
halfwave inverted V dipole -- but with the advantage that it can be tuned
to work on any frequency for which the wire length is at least 0.2
wavelengths.
- notes - Hertz antennas have an advantage in the Winter since the
feedline is not up in the air. /// The most durable antenna wire is
braided phosphor bronze, #22 will easily carry 1500W. /// when viewed
from above the wire must be pretty much is a straight line and not fold
back on itself.
------Rich, AG6K
===================
Tnx Rich for the above useful advice, which I have filed.

Frank GM0CSZ / KN6WH

Antenna advice?
 

In article , highlandham
wrote:

On 28/06/10 13:23, •R. Measures. AG6K wrote:
In , "
wrote:

Hi

I have a 50 ft tower just ready to throw up something to operate.

Cost is the problem but I have a lot of parts to build. I want to put up a
dipole (I have a manual all band tuner) and my question is should feed it
with ladder line or feed it with coax and then run each leg about 68 ft .

Second idea is I have an old aluminum omni antenna that used to have 3 traps
within it, however at that height it will come down quickly as this antenna
is meant to be on the ground (no ground planes) so I want to make this omni
as long as practically possible and tune it to utilize it as best possible.

Any suggestions? This is really all I have to work with. Only want to climb
this thing a couple times and hope its good for the winter.

• RON -- I would install a pulley on a short arm at the top of the tower
so that I could rig a halyard to raise and lower the middle of an
inverted-V antenna wire. One end of the wire is the feed point (fed
against gnd) and the unfed end has an insulator and a tie off to a point
at least 7' above ground. The feed point Z can be up to several
kilo-ohms, so an L-network is used to match the feed Z to 50-ohms. A
remote controlled L-network is a good way to go. When this antenna is a
half-wave, it's called a Hertz antenna and it acts like a plain-vanilla
halfwave inverted V dipole -- but with the advantage that it can be tuned
to work on any frequency for which the wire length is at least 0.2
wavelengths.
- notes - Hertz antennas have an advantage in the Winter since the
feedline is not up in the air. /// The most durable antenna wire is
braided phosphor bronze, #22 will easily carry 1500W. /// when viewed
from above the wire must be pretty much is a straight line and not fold
back on itself.
------Rich, AG6K
===================
Tnx Rich for the above useful advice, which I have filed.

• ur welcome Ron

Frank GM0CSZ / KN6WH

--
Richard L. Measures. 805-386-3734,AG6K, www.somis.org