This antenna photo showed up on a couple of sites I am a member of. The discussion centered around two things- 1. Have you seen this?, 2. Does it work as advertised?
It is advertised to be a portable 11 meter beam.
I entered the first discussion because one of the forum members emailed me asking whether I would be willing to make one and test it to answer the questions of its true nature.
I told the second forum that I had said I would do this when I got some time.
I'm inviting the WWRF in on the fun.
So far:
quotes from other places:
"I used copper tubing to put one together based on the posted specs. Until I get it out in the open air and coax on it I can't be sure, but suspended in the garage with a short jumper it does not approach a readable SWR on any frequency. I can not tell by any of the drawings whether there is more to the antenna than as described in previous posts. More to come with photos."
"Ok, I put it on a step ladder and hooked up the analyzer. Details later.
I also hooked up a small AM radio and listened, and got a radio check from a truck driver on ch 19: video to come of that.
It has an atrocious SWR, and the X=0 resonance is elsewhere.
Photos and more comments to come. I am due at work in 10 minutes."
"I want to add that I believe this antenna may have potential in a limited way.
I have used copper tubing because I wanted to reuse it for another project when done with this.
I have most of the aluminum strap to go exactly to the materials specs and will get the remaining piece to do it up and see. . ."
"Two quick photos and a video link to the first on-air test.
Where it shows X=0 resonance:
"
"Where the supposed center frequency is supposed to be - not quite there in this model:
"
"And a video link of the first test:
"
In Touch - 2el Miniature Pulsar Antenna Homebrew
It is advertised to be a portable 11 meter beam.
I entered the first discussion because one of the forum members emailed me asking whether I would be willing to make one and test it to answer the questions of its true nature.
I told the second forum that I had said I would do this when I got some time.
I'm inviting the WWRF in on the fun.
So far:
quotes from other places:
"I used copper tubing to put one together based on the posted specs. Until I get it out in the open air and coax on it I can't be sure, but suspended in the garage with a short jumper it does not approach a readable SWR on any frequency. I can not tell by any of the drawings whether there is more to the antenna than as described in previous posts. More to come with photos."
"Ok, I put it on a step ladder and hooked up the analyzer. Details later.
I also hooked up a small AM radio and listened, and got a radio check from a truck driver on ch 19: video to come of that.
It has an atrocious SWR, and the X=0 resonance is elsewhere.
Photos and more comments to come. I am due at work in 10 minutes."
"I want to add that I believe this antenna may have potential in a limited way.
I have used copper tubing because I wanted to reuse it for another project when done with this.
I have most of the aluminum strap to go exactly to the materials specs and will get the remaining piece to do it up and see. . ."
"Two quick photos and a video link to the first on-air test.
Where it shows X=0 resonance:
"
"Where the supposed center frequency is supposed to be - not quite there in this model:
"
"And a video link of the first test:
"
In Touch - 2el Miniature Pulsar Antenna Homebrew