New answers tagged

0

As you are talking about the guttering I can imagine you may well then have access to a loft area. If so, Consider an end fed wire installed as high as possible, in this space, then zig zag to get a little extra length, run it into a SG239 smart tuner and feed the coaxial down to your transceiver. Hey ho! it works! Problem is an SG239 is expensive to ...


2

My gutter antenna experiments revealed that the gutter (metal of course!) itself can be used as end-fed half-wave antenna on the self resonance frequency. The efficiency is poor: the losses to conducting environment are very high, even with dry weather. For reception such antenna can be used, but all the interference generated in the house is coupled to the ...


0

For a theoretical answer to the first two questions, the skin effect is caused by magnetic fields generated by the currents repelling each other, so the current flows as far away from current of the same direction as it can get. The overall result spreads the current out over the entire outer surface, with an exponential weakening of the current as you go ...


1

On a closed tube, the current only flows on the outside. On a strip, the current flows on both sides. It might not be equally distributed, but I don't believe that there is enough difference between the current density between the center and the edges to matter.


1

While someone flagged this question as off-topic for this site, I think as a “technology of radio” question, it still stands. And I would say that it should be amateur radio-related, as I would recommend using ham bands for this application. Simply because a licensed amateur can use more power than is possible on an unlicensed band. With a good yagi-uda ...


1

Sounds like a small-lot problem. Nobody with personal experience with a 40m - 10m end-fed half-wave antenna has responded, so I'll chime in. I don't like unanswered questions ;) If you bring a metal mast "near" your EFHW, the two antennas will interact. (Some would say that they won't be two antennas, they will be a single antenna with two ports....


Top 50 recent answers are included