u/LaMarr-Bruister

Alpha Delta switch question re: SWR

I have been planning to order an Alpha Delta Switch to put outside where the coax enters my house. I was looking at images online and there is a warning sticker on the back of the switch about not using if the SWR exceeds 2-1 at the antenna feedpoint.

I'm planning to experiment with random wire's, rybakov's, etc... and will require a tuner. Are there any switches that can easily handle these antennas and not have an issue? I don't want to have to go outside and unscrew the arc protector or replace the switch, because I wanted to use a random length of wire.

I'm only planning to run 100watts, but might as well purchase the best product for my usage.

Here is a link - not my site - that shows the picture. https://www.radioworld.co.uk/second-hand-alpha-delta-4b-4-way-coax-switch

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u/LaMarr-Bruister — 3 days ago

Help understanding EFHW connections

I am thinking about an EFHW and am confused about the connections and strain relief, tightening the slack out of the wire, etc.... I can go from the corner of my garage, which is at about 30', and slope it to a galvanized pole in the ground that's about 70' away. I am planning a 66' efhw with a 49:1 unun.

If I mount the unun on the post and feed coax there, the ring terminal surely can't take the strain of the wire. On the garage side, I plan to just use a rope attached to an insulator for the non feed side, and hope the wire through the insulator will hold.

What's the best method for these attachments and to keep things taught? I've never made anything out of a wire, but am excited to give it a go. I know this is pretty rookie level stuff, but I am lost.

Thanks!

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u/LaMarr-Bruister — 7 days ago

I am hoping to play around with making a dedicated 20m vertical and don't want to use guys in the backyard. They will be an endless aggravation with kids playing, mowing, etc... I've been thinking about using a 20' pc of 2" galvanized pipe with 3' in cement in the ground, but being conductive, I'm sure that will mess things up, even with some sort of fabricated insulated standoff.

I don't think any of the fiberglass poles can survive long-term outside without guying and even with it, I'm not sure how permanent they are.

Curious what those with more experience would recommend for a permanent mast that won't need guying?

Thanks!

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u/LaMarr-Bruister — 21 days ago