Remote Switched Coil for 80m and 160m with a 43′ vertical.

As many of you know, I have a Zero-Five 43′ vertical that I–in concert with the Alpha 9500–managed to set on fire. My 43 foot antenna works OK on 80m (good worldwide DX) and even decent range on 160m, but I have a terrible VSWR on 80 and 160. My Palstar and Ten Tec 238 manual tuner can handle it even at 1500, but rather than have such terrible losses in my 150 feet of coax, I decided it would be a fun project to build a remote-switched coil setup that will work with my UNUN for the rest of the bands. You can read more about the project from the website of Phil Salas, AD5X. Phil has a great website with articles describing his work and analysis of the 43 foot vertical.

Normally I stay away from MFJ gear, but Phil listed them as a source for the coil for 80 and 160. As this is just a single coil with no moving parts, I figured I was safe in using the MFJ part. 🙂 I ordered the coil and insulators from MFJ last week. I need to get the relay from Array Solutions and some parts from Mouser.

I will still need a tuner with this for 60 – 10 and for that, I am anxiously awaiting the arrival of the Alpha 4040 4KW auto antenna tuner. It is shaping up to be quite the box.

I will update my site as I progress through the project along with some pictures. Fall is a great time for antenna projects in Florida and what better than getting ready for winter DX on 80m and 160m?

Finally….toning cables…

After many years dealing with telecom (and using other people’s toning tools), I broke down and got a nice Fluke cable tester and tone tool. The tool is a Fluke Networks MT-8200-60A IntelliTone Pro 200 Kit . This started because I have to tone out a bunch of coax cables from the back of the house and I tend to do those things as time allows without anyone else around. The tester has an F connector on it so I can hook up an F connector to N female patch cord to connect coax cables. It also have alligator clips to allow hooking to bare wires or even a jack that will check RJ45/RJ11 connectors. Once I get it on Tuesday I will give it a try and report back.


Fun with Heliax Connectors

I finally took the time to learn how to install connectors on Heliax LDF4-50A 1/2″ hardline. I have the Positive Stop right angle connectors as well as older style “solder the tip” connectors. I also have a CPT-L4ARC tool that hooks to my drill. The automatic stripping tool ended up being the most trouble to learn the right way to use that. I learned that the solder connectors are not going to be the easiest ones to use in the field, but they do make a nice joint.

The secret to learning was I took a 2 foot piece of cable and 2 hours to try the installation multiple times until I became comfortable with it.