HFU HF Underground

Technical Topics => Equipment => Topic started by: Matt285 on July 10, 2020, 1549 UTC

Title: End fed SWL sloper (Grounding?)
Post by: Matt285 on July 10, 2020, 1549 UTC

Folks using antennas such as the Alpha Delta or Par End fed SWL slopers. Do you ground the antenna? I don't think I would buy one, but I'm thinking about rigging up a 9:1 balun and 45' of wire to try out. Thanks

Title: Re: End fed SWL sloper (Grounding?)
Post by: pinto vortando on July 11, 2020, 0907 UTC

Got a couple of the PARs here and neither one has a ground attached.  Never experimented with adding a ground
so cannot comment on how they might perform with a ground.  They worked fine right out of the box.
Only modification was doubling the length of one of them... it seemed to improve AM BCB DX performance.
Built several of my own 50' antennas with homemade 9:1 baluns and never got the broadband performance that the PARs provide.

Title: Re: End fed SWL sloper (Grounding?)
Post by: ChrisSmolinski on July 11, 2020, 1519 UTC

Coincidentally, I have been doing some modeling of a terminated sloper, if you carefully adjust the height and angle you can get a relatively nice directional pattern with a low elevation angle, but only over a narrow frequency range, say one band.