Re: [Elecraft] Beam antenna question

Years ago in grad school I strung antenna of 22 gauge green enameled bell wire, and it was so hard to see that I would go outside and look up to see it against the sky to check it before operating. Even I couldn't see it... only ran 150 watts on it. On Sun, May 21, 2017 at 15:42 Fred Jensen wro

Re: [Elecraft] Beam antenna question

Indeed! Apollo 11 landed close to 2 km downrange from the center of the planned landing footprint. This was the result of a lunar gravitational potential model that didn't exactly match the real world. No one screwed up, the computer worked correctly, the potential model was fine except that

Re: [Elecraft] Beam antenna question

I really appreciate the answers to my question about further disguising the Hex from neighbors -- thanks for those. On Sun, May 21, 2017 at 7:59 AM, Joe Subich, W4TV wrote: > On 5/21/2017 12:45 AM, Vic Rosenthal wrote: > >> The TH11DXX that G3TXQ compares to the Hexbeam has at least 3 elements o

Re: [Elecraft] Beam antenna question

On 5/21/2017 12:45 AM, Vic Rosenthal wrote: The TH11DXX that G3TXQ compares to the Hexbeam has at least 3 elements on each band and is a modern design, no traps. The TH11 has driven elements for 12, 17, 15, 12 and 10 (2) with reflectors for 20 and 17 and trapped directors for 10, 15 and 20. Elem

Re: [Elecraft] Beam antenna question

On Sat,5/20/2017 9:14 PM, Igor Sokolov wrote: Reality sometimes differ from calculations. When that happens, the person doing the calculating has not correctly formed the equation to define the problem, or doesn't know how to calculate. :) I've done a lot of modeling using NEC, and every an

Re: [Elecraft] Beam antenna question

The TH11DXX that G3TXQ compares to the Hexbeam has at least 3 elements on each band and is a modern design, no traps. If someone found that the C3 (2 el on each band) outperformed it, I would be very suspicious that something was wrong with the sample tested. I did look at the wrong picture and

Re: [Elecraft] Beam antenna question

Please disregard my message below. XR5-T with cap hats is called XR6. And Joe is talking about XR5-T. I apologize for my mistake. 73, Igor UA9CDC 21.05.2017 9:27, Igor Sokolov пишет: 21.05.2017 1:28, Joe Subich, W4TV пишет: Neither the XR5 nor the Navassa 5 has 11 elements *or* capaci

Re: [Elecraft] Beam antenna question

21.05.2017 1:28, Joe Subich, W4TV пишет: Neither the XR5 nor the Navassa 5 has 11 elements *or* capacity hats. The XR5 is a 9-element antenna and the Navassa 5 has 10 elements as documented in the two links I provided. 73, ... Joe, W4TV Here is what can be found on the page of Innov

Re: [Elecraft] Beam antenna question

Joe, Reality sometimes differ from calculations. XR5T has shortened 20m elements and pretty poor F/B as compared to Hex. Last year we were operating in WPX contest from Madeira, CT9 and had 2 antennas up on 15m band. One was 4 el Op-Des 15m full size monobander from Innovantennas. Another one

Re: [Elecraft] Beam antenna question

> Why do you think it will "significantly outperform the hex beams?" Based on the performance data (K7LXC/N0AX) for the original Force 12 C3 and TH11 with comparisons of the broadband Hexbeam and the TH11. The K7LXC/N0AX field data shows the C3 outperforming the TH11 while G3TXQ's web page

Re: [Elecraft] Beam antenna question

lecraft@mailman.qth.net Subject: Re: [Elecraft] Beam antenna question Why do you think it will "significantly outperform the hex beams?" The point about uv is well taken re fiberglass, but I don't know what the cords on all the hexbeam versions are made of. There are uv resistant

Re: [Elecraft] Beam antenna question

Why do you think it will "significantly outperform the hex beams?" The point about uv is well taken re fiberglass, but I don't know what the cords on all the hexbeam versions are made of. There are uv resistant materials available. I wouldn't say an 11 element yagi with capacity hats on the elem

Re: [Elecraft] Beam antenna question

>> ...I don't want to be taking the beam down and replacing main structural >> components every 5 yrs. >> Can anyone with a hex beam comment on this? I have had several homebrew hexbeams, which have survived weather quite well. 1. Use UV-resistant cord, e.g. 3/32" "Antenna Rope" double braided p

Re: [Elecraft] Beam antenna question

Any horizontally-polarized antenna needs to be at least 1/2 wavelength above ground for optimum performance, e.g. 32 feet up on 20 meters, 16 feet up on 10 meters. They will work at lower heights of course, but at reduced gain as they are lower. 20 feet sounds like a reasonable compromise for a

Re: [Elecraft] Beam antenna question

>> antenna. I have also read they only need to be up about 20 feet high. They >> are said to be good in the wind. (Maybe all this has been mentioned) >> >> Rich, n0ce >> >> From: Victor Rosenthal 4X6GP >> Sent: Friday, May 19, 2017 10:49 PM >> To: el

Re: [Elecraft] Beam antenna question

On 5/20/2017 11:32 AM, Terry Brown wrote: > These beams are not cheap, I don't want to be taking the beam down > and replacing main structural components every 5 yrs. > > Can anyone with a hex beam comment on this? Your concerns are well placed with antennas made of fiberglass and dacron/kevlar

Re: [Elecraft] Beam antenna question

e up about 20 feet high. They are said to be > good in the wind. (Maybe all this has been mentioned) > > Rich, n0ce > > From: Victor Rosenthal 4X6GP > Sent: Friday, May 19, 2017 10:49 PM > To: elecraft@mailman.qth.net; Terry Brown > Subject: Re: [Elecraft] Beam antenna

Re: [Elecraft] Beam antenna question

. (Maybe all this has been mentioned) Rich, n0ce From: Victor Rosenthal 4X6GP<mailto:k2vco@gmail.com> Sent: Friday, May 19, 2017 10:49 PM To: elecraft@mailman.qth.net<mailto:elecraft@mailman.qth.net>; Terry Brown<mailto:n...@comcast.net> Subject: Re: [Elecraft] Beam antenna qu

Re: [Elecraft] Beam antenna question

Terry, Look at the footprint of UB20MX http://www.ultrabeam.it/site/index.php?option=com_content&view=article&id=54&Itemid=18&lang=en BennyOH9NB --- Avast Antivirus on tarkistanut tämän sähköpostin virusten varalta. https://www.avast.com/antivirus ___

Re: [Elecraft] Beam antenna question

I have that kind of neighbor hood, so I painted the spreaders grey, and the mast and cables grey, to match the garage and the too frequent midwestern sky, put the mast base and rotor inside the garage, so the hex just kinds blooms about 10 foot over the roof. With the rotor and base hidde

Re: [Elecraft] Beam antenna question

The low visual profile is helpful to keep the neighbors from noticing. I wonder whether anybody has done anything else to minimize the visual impact even further line a non-metallic spray paint. Thanks ahead of time, good folks. On Sat, May 20, 2017 at 5:33 AM, Igor Sokolov wrote: > Terry, > > A

Re: [Elecraft] Beam antenna question

Terry, As many others mentioned? Hex beam is the best choise. I have 3 of them made by EU manufacturers (very good quality). And one of them (www.foldinganteannas.com) is even foldable and very light weight. You may also look for MW0JZE Hex. he also makes light version. Do not mess with Al a

Re: [Elecraft] Beam antenna question

I used the K4KIO hexbeam on Field Day -- it was very easy to assemble and the parts were high quality. It is also visually low-profile. I would recommend it. I don't have any experience with the TA33 Jr. but my guess is that there are a lot more things that can go wrong with all those traps.

Re: [Elecraft] Beam antenna question

I agree 100% about the hex beam; I had the original Traffie 20m monobander and now have the K4KIO broadband 5-band hex beam. Both work extremely well on their designed bands. However -- it has been my experience that a 5-band hex beam works great as a very low-noise receiving antenna on 40m and 80

Re: [Elecraft] Beam antenna question

On Fri, May 19, 2017 at 7:04 PM, Ian wrote: > ...have you consider one of > the many hex-beams that are available? ... I have a 5-band model... === What Ian said! I put up a 5-band hex-beam on my chimney, 21 feet off the ground. The results were terrific. My model came from DX Engineerin

Re: [Elecraft] Beam antenna question

Terry, If you need a beam with a smaller footprint, have you consider one of the many hex-beams that are available? I've had one for several years and really enjoy it. I have a 5-band model that covers all bands, 20m- 10m, WARC bands included. Mine has about as much gain on each band as a 2-element

Re: [Elecraft] Beam antenna question

For a small footprint it is hard to beat the K4KIO hexagonal beam. I have one and it works well but a better testimonial is a ham about 10 blocks away with the same antenna and he is on DXCC Honor Roll. hight is about 35 feet. No tuner needed and all bands 20 through 10 plus six if you want

[Elecraft] Beam antenna question

I apologize that this is not a direct Elecraft equipment question, but having the K2, KX2, KX3, PX3 and KXPA100, I thought I would ask. I will be moving to a new QTH. I just took down an old Cushcraft ATB-34, on a 50 ft. tower. It was the predecessor to the A4. I need a beam with a smaller foot