Re: Topband: 160m Sloping Vertical Antenna?
Hi Ed - I have done the same thing on 80/75 meters with great results using a tree and a sling shot to get the wire up. Used chicken wire for the ground system. Did this the first time from an apartment in Phoenix, Arizona in the late 90's using a 45 foot tree and put a 8ft x4ft pieced of chicken wire on the balcony of my 2nd floor apartment. Although tuned for 80/75, I got it to play on 160-10 with the appropriate matching devices. Worked 135 countries on 80/75 with this setup and since I was going through a divorce, it helped me keep my sanity. Happy holidays. Tnx and 73, Dave N7RK _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
More likely it was a mix of groundwave and sky wave, if the station was local, cancelling or reinforcing signal as phase shifted on the sky wave path. - Original Message - From: Richard (Rick) Karlquist rich...@karlquist.com To: Art Roberts - W5AER w5...@hotmail.com; topband@contesting.com Sent: Wednesday, December 24, 2014 9:23 PM Subject: Re: Topband: 160m Sloping Vertical Antenna? On 12/24/2014 3:39 PM, Art Roberts - W5AER wrote: On the thought of a low dipole: Years ago in Northern California, as an experiment, I had a VERY low dipole and got some strange results. Listening to a local station, in the afternoon, there was very deep QSB. We were able to talk, but with difficulty. 73, Art W5AER Were you cross polarized; IE was the other station running a vertical? If so, minor fluctuations in propagation could result in major fluctations of polarization cancellation. Rick N6RK _ Topband Reflector Archives - http://www.contesting.com/_topband - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4794 / Virus Database: 4253/8802 - Release Date: 12/24/14 _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
Multi-path was my thought as well! Merry Christmas! 73, Charlie, K4OTV -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI Sent: Thursday, December 25, 2014 11:02 AM To: Richard (Rick) Karlquist; Art Roberts - W5AER; topband@contesting.com Subject: Re: Topband: 160m Sloping Vertical Antenna? More likely it was a mix of groundwave and sky wave, if the station was local, cancelling or reinforcing signal as phase shifted on the sky wave path. - Original Message - From: Richard (Rick) Karlquist rich...@karlquist.com To: Art Roberts - W5AER w5...@hotmail.com; topband@contesting.com Sent: Wednesday, December 24, 2014 9:23 PM Subject: Re: Topband: 160m Sloping Vertical Antenna? On 12/24/2014 3:39 PM, Art Roberts - W5AER wrote: On the thought of a low dipole: Years ago in Northern California, as an experiment, I had a VERY low dipole and got some strange results. Listening to a local station, in the afternoon, there was very deep QSB. We were able to talk, but with difficulty. 73, Art W5AER Were you cross polarized; IE was the other station running a vertical? If so, minor fluctuations in propagation could result in major fluctations of polarization cancellation. Rick N6RK _ Topband Reflector Archives - http://www.contesting.com/_topband - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4794 / Virus Database: 4253/8802 - Release Date: 12/24/14 _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: 160m Sloping Vertical Antenna?
Trying to figure out how to best utilize my 106' tower for 160m. The tower sits on a small hill so the downside of the tower is sloping. If I hang a wire off the top, I can bring the other end to the ground and feed it at the bottom. I can ran numerous radials from there. This arrangement can accommodate a quarter wave length. The angle of the tower would be about 20 degrees. Any objections to this plan? Open to other ideas. Thanks in advance and happy holidays! Ed NI6S _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
On Wed,12/24/2014 10:29 AM, Ed via Topband wrote: Trying to figure out how to best utilize my 106' tower for 160m. The tower sits on a small hill so the downside of the tower is sloping. If I hang a wire off the top, I can bring the other end to the ground and feed it at the bottom. I can ran numerous radials from there. That's exactly what I'm doing -- my tower is 115 ft with roughly 7 ft of mast above it and a 3-el SteppIR. I have sloping wires on two opposite sides, supported from the tower just below the rotator with a 10 ft section of 4-in PVC conduit. Each wire has its own set of 4 radials elevated about 18 ft. The tower, which is grounded, has a dozen or so radials laying on the ground. With this configuration, the tower will act as a reflector, yielding about 6 dB front to back. How much GAIN you get will depend on your radial system and the quality of your soil. I started with radials elevated only a few feet, and gain was poor. On the advice of N6BT, I raised them and gain improved. 73, Jim K9YC _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
I used to use a similar method on 80 meters. Why not feed it (them) at the top? Jim - KR9U -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Brown Sent: Wednesday, December 24, 2014 1:46 PM To: topband@contesting.com Subject: Re: Topband: 160m Sloping Vertical Antenna? On Wed,12/24/2014 10:29 AM, Ed via Topband wrote: Trying to figure out how to best utilize my 106' tower for 160m. The tower sits on a small hill so the downside of the tower is sloping. If I hang a wire off the top, I can bring the other end to the ground and feed it at the bottom. I can ran numerous radials from there. That's exactly what I'm doing -- my tower is 115 ft with roughly 7 ft of mast above it and a 3-el SteppIR. I have sloping wires on two opposite sides, supported from the tower just below the rotator with a 10 ft section of 4-in PVC conduit. Each wire has its own set of 4 radials elevated about 18 ft. The tower, which is grounded, has a dozen or so radials laying on the ground. With this configuration, the tower will act as a reflector, yielding about 6 dB front to back. How much GAIN you get will depend on your radial system and the quality of your soil. I started with radials elevated only a few feet, and gain was poor. On the advice of N6BT, I raised them and gain improved. 73, Jim K9YC _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
Do a sloper (half WL) and feed in the center. Half of one of the half go to the other side, like an inverted V 73, Jorge CX6VM/CW5W Enviado desde mi iPhone El 24/12/2014, a las 17:10, James Wolf jbw...@comcast.net escribió: I used to use a similar method on 80 meters. Why not feed it (them) at the top? Jim - KR9U -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Brown Sent: Wednesday, December 24, 2014 1:46 PM To: topband@contesting.com Subject: Re: Topband: 160m Sloping Vertical Antenna? On Wed,12/24/2014 10:29 AM, Ed via Topband wrote: Trying to figure out how to best utilize my 106' tower for 160m. The tower sits on a small hill so the downside of the tower is sloping. If I hang a wire off the top, I can bring the other end to the ground and feed it at the bottom. I can ran numerous radials from there. That's exactly what I'm doing -- my tower is 115 ft with roughly 7 ft of mast above it and a 3-el SteppIR. I have sloping wires on two opposite sides, supported from the tower just below the rotator with a 10 ft section of 4-in PVC conduit. Each wire has its own set of 4 radials elevated about 18 ft. The tower, which is grounded, has a dozen or so radials laying on the ground. With this configuration, the tower will act as a reflector, yielding about 6 dB front to back. How much GAIN you get will depend on your radial system and the quality of your soil. I started with radials elevated only a few feet, and gain was poor. On the advice of N6BT, I raised them and gain improved. 73, Jim K9YC _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
On Wed,12/24/2014 1:05 PM, Jorge Diez CX6VM wrote: Half of one of the half go to the other side, like an inverted V That would be a pretty low dipole on 160M, and verticals tend to be far more effective on 160M than low dipoles. 73, Jim K9YC _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
On the thought of a low dipole: Years ago in Northern California, as an experiment, I had a VERY low dipole and got some strange results. Listening to a local station, in the afternoon, there was very deep QSB. We were able to talk, but with difficulty. 73, Art W5AER On 12/24/2014 4:53 PM, Jim Brown wrote: On Wed,12/24/2014 1:05 PM, Jorge Diez CX6VM wrote: Half of one of the half go to the other side, like an inverted V That would be a pretty low dipole on 160M, and verticals tend to be far more effective on 160M than low dipoles. 73, Jim K9YC _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
On 12/24/2014 3:39 PM, Art Roberts - W5AER wrote: On the thought of a low dipole: Years ago in Northern California, as an experiment, I had a VERY low dipole and got some strange results. Listening to a local station, in the afternoon, there was very deep QSB. We were able to talk, but with difficulty. 73, Art W5AER Were you cross polarized; IE was the other station running a vertical? If so, minor fluctuations in propagation could result in major fluctations of polarization cancellation. Rick N6RK _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 160m Sloping Vertical Antenna?
Jorge, I have a 160m antenna asymmetrical antenna, fed against ground, that goes from one corner of my 120 ft by 120 ft lot to the opposite corner. It is held up by a single pole, about 55 ft tall. The pole is closer to the fed end. The wire going up to the pole makes about a 65 degree angle above the horizontal; the wire going down to the opposite corner makes an angle of about 25 degrees below the horizontal (the angles are estimated by eye-they definitely have not been measured). The far end is about 10 ft off the ground. In other words an inverted L where the vertical part is not vertical and the horizontal part is not horizontal. The length is the length arrived at by many trials and errors that, with a matching capacitor between the antenna and one inch hardline coax feeder, yielded an SWR of approximately 1:1 at 1825 mHz. I also use this antenna on 80 m through 10 m by using an antenna tuner in the shack. My radials are about one inch deep in the ground and restricted to one quadrant. They vary in length from 100 ft (along the north and east fence lines) down to 35 ft (house in the way). Number of radials is probably about 20 (I really don't remember). QTH is SE NM. Maximum power is 500 watts. I have 190 countries confirmed on160 m. I have no idea of the pattern of the 160 m antenna. I am guessing that it works as well as it does because the maximum radiation occurs well above ground (and the ground around its feed point is very cluttered by power lines, houses, trees) and is not straight up (like a low inverted dipole). 73 Paul W5DM _ Topband Reflector Archives - http://www.contesting.com/_topband
