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Technical Topics => Equipment => Topic started by: Erik Mattson on December 17, 2021, 2351 UTC

Title: Two End-fed Sloper Questions
Post by: Erik Mattson on December 17, 2021, 2351 UTC

 1. What difference does putting the coax connection on the high end or low end make?
 2. How should it be oriented in relation to a transmitter?

Thanks,
Gern Blanston

Title: Re: Two End-fed Sloper Questions
Post by: ~SIGINT~ on December 18, 2021, 0138 UTC

Good day Gern,

For receive only purposes, the feed point can be placed at either end of the antenna. Traditionally, the end-fed sloper is fed at the elevated end and there are several technical reasons for that. The only time you would need to feed an end-fed sloper on the elevated side is if you were building a terminated end-fed antenna. Obviously you would not want the terminating resistor some 40 feet off the ground. An example of this can be seen here:

Off-center-fed nonresonant sloper antenna
http://hamantennas.blogspot.com/2011/02/off-center-fed-nonresonant-sloper.html (http://hamantennas.blogspot.com/2011/02/off-center-fed-nonresonant-sloper.html)

For a traditional sloper and directivity, have a look at the diagram on this page:

Wire Antennas
http://www.hard-core-dx.com/nordicdx/antenna/wire/sloper.html (http://www.hard-core-dx.com/nordicdx/antenna/wire/sloper.html)

Title: Re: Two End-fed Sloper Questions
Post by: Erik Mattson on December 18, 2021, 0357 UTC

Thanks!