Web Updated;
06/07/2011
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Testing and Results
| Initial test results are very encouraging, band width is
approx 175KHz and extends from 7.020 to 7.190MHz with a VSWR of less than
1:1.25 increasing to 1:1.26 below 7.010.
I have produced the diagram (right) to detail the dimensions, however final length adjustment of the tails will be required subject to your installation parameters. Clicking on the picture will down load a larger readable file which you may save and use for your own designs.
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Left you can see the MiniVNA results of the antenna,
Bandwidth is fantastic and at a max length of 8m end to end it radiated
very well.
Initial indications are that it is 2-3 S points up on my standard 40m dipole (which admittedly is bent around the loft) This antenna does not have the most gain available by using other construction techniques, however it is an excellent performer for the Radio Ham with a limited space or stealth requirement. Again, clicking on the picture left will download a larger JPG 73 for now. M0KTY |
** Operating update! - 7th March 2011 **
Now the antenna has been operational for a while I can confirm some very good contacts, further than I have managed before.
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4A3A - Mexico 7.158.900 MHz 28-03-2010 22:34 Hrs Local |
| YT8A - Serbia 7.136.000 MHz 28-03-2010 22:33 Hrs Local |
Overall signal is up 2 to 3 S points than the straight dipole, however it DOES bring in a lot of noise, noise floor is up at least 2 S point to a constant S5. Overall it is a performer, I need to try and work a way of making it less noisy!
Suggestions on a postcard please..........