EmComm

This past weekend we had a major storm event across the southeast. There were as many as 40 deaths reported as well damage from strong winds and tornados. there were 56 tornados reported across 10 states to include 2 EF-4, and several EF-3’s, I started watching the storm system as it crossed the Mississippi/Louisiana border. I paid particular attention to the system as it approached Birmingham, AL. I live just east of the Georgia/Alabama border.

My local EmComm group started a net on the local 2 meter repeater at 2130 hrs EDT. By that time I was already within the outer fringes of the storm. Lightning was everywhere. When lightning gets within about 20 miles of my QTH, I shut down and disconnect all my radios. In my 30 years of amateur radio, I suffered from 2 lightning strikes. Both came up through the mains (commercial) ground system. the first time about 20 years ago cost me about $3,000 and the last time in 2019 cost me about $7,000.

I broke out my HT and tried to check into the net. I could break squelch on the repeater and that was about it. I am a good ways away from the repeater. Radio comms was out of the question so I sent a text message to the NCS — no reply. I also sent him an email — no reply. Because of the intensity of the lightning, I also shut down and disconnected my computers, I was on my iPhone and iPad to monitor the storms progress.

Fortunately, the storm dissipated somewhat before reaching my QTH but there was still a lot of lightning and a lot of rain. When considering EmComm for any event, the best methods should always be used. In my case, it was not radio, but my cell phone. It was safer. Often in amateur radio EmComm we get fixated on using the radio when other means that may be more efficient and safer are available. In my case sending a text message and/or an email was the best bet. I remember an exercise a long time ago when I watched an operator try to send a message on his HT from inside the EMA. He had trouble hitting the repeater and the end user had trouble copying him. All the while he was sitting next to an operational FAX machine.

When we develop a communications plan, we should always consider the best means/mode available. If the cell phone works, use it, plan for it. When it stops working, then use the next best and so on and so on. It’s never a good idea to start with a 3rd tier system and work down from there. Here in the southeast, except for a major hurricane, cell service is usually working during and after a storm/disaster.

In my case, when the net started, I was surrounded by lightning and using a radio with a tower mounted antenna was not safe. While I had other means to communicate, there was nobody on the other end. It was a sobering experience. If you don’t have a plan, make one. If you have a plan, review it. Make sure you are using the best means/methods/modes available. Have a tiered approach, first A, then B, then C and so on. Relying only on one method is a recipe for failure. Remember the 7-P’s: Proper Planning and Preparation Prevents Piss Poor Performance.

Bicycle Mobile

For the past 7 months, I have been walking to improve my health. Recently, I bought a bike to change up the routine a little. I think it would be fun to ride while I am camping and the times when I am not at the highest point in the park, I could ride my bike there. When I bought the bike I had them put on a rack. This left a very nice mounting tab for the antennas.

I had some angle aluminum from a prior project so that is where I started. I cut the aluminum to match the width of the rack and then started shaping it. I only had hand tools and there was a lot of filing involved.

The hole on the left is for a SO-239 mount and the one on the right is for a 3/8-24 bolt. The SO-239 is attached to some thin coax probably RG-174 and terminated in a female SMA connector. Perfect for an HT. To get the wide radius I cut in the metal with a Dremel tool.

This is where the hand filing came in. After the filing came sanding the old finish off and applying coats of primer, flat black paint, and a clear coat. Installed on the bike it looks like this with a Diamond NR-770HA dual band antenna.

Out by me, the repeaters are VHF, I tuned it for that band. I ended up with this.

With an HT on the other end, I was able to hit repeaters 10 miles away while under my carport. I called it good.

I also wanted to work HF using my bike as a stand. I won’t ride with the HF antenna installed but rather set it up when I stop. I mounted a 3/8-24 coupler to the antenna mount and wanted to use my Buddipole 12′ fiberglass antenna. I tried several different combinations and the one that worked best was using my Chameleon Micro Hybrid transformer with one counterpoise.

SWR on 6 meters through 40 was acceptable and can easily be handled by a tuner.

I didn’t try HF on the bike but I have used the configuration before. It’s part of my Frankentenna system. The only thing left I have to add is a handi-talkie mount which I will probably order today.

There you have it. A fun little project that will add to the adventure of ham radio. I hope this may spur some of you to try a few projects of your own. Most of these projects I do are with hand tools. I do have a cheap drill press that only seems to be a little better than a hand drill. Get out there and do it. 73 — Scott