Communications form Mt. St. Helens...amateur radio

Posted by: Dryer

Communications form Mt. St. Helens...amateur radio - 01/27/10 07:50 AM

A few years ago, I posted an "ultralight" antenna design in the MYOG section called the "KD5IVP Backpacker Yagi".
http://www.backpacking.net/makegear/yagi-antenna/index.html

Turns out, a young gentleman built my antenna and posted a "how to" video on Youtube, on how to build the thing:
http://www.youtube.com/watch?v=kPGmad2MMWM

....and another using my design to make a 211 mile contact from Mt. St. Helens using a walkie talkie:
http://www.youtube.com/watch?v=nb6c9DdMkyc

This antenna weights 2.1 ounces and is what I use in the backcountry when out of cell phone range. I've made contacts well over 150 miles and through satellites using it. I don't know the fellow who made the video but he did a fine job!

So, if you have your amateur radio license, build this antenna. It can save your tail, and also doubles as a tarp pole.
Posted by: n0oxk

Re: Communications form Mt. St. Helens...amateur radio - 01/27/10 06:58 PM

Nice little antenna project. Going to have to try it out. It is a good feeling when you see someone using your design and having fun with it. 73 n0oxk
Jeff
Posted by: Jimshaw

Re: Communications form Mt. St. Helens...amateur radio - 01/27/10 11:32 PM

Nice antenna Dryer
ever try to make a folded one or etch it on duroid or ceramic?
Jim
Posted by: Dryer

Re: Communications form Mt. St. Helens...amateur radio - 01/28/10 02:23 PM

Jim...
Yeah, I've laminated them into plastic sheet, used copper tape on plastic sheet, etc. The carbon arrow shaft idea is final design of several attempts and gives me double duty, plus I can stack elements off the end for more gain if I want.
Posted by: Jimshaw

Re: Communications form Mt. St. Helens...amateur radio - 01/28/10 07:04 PM

Dryer
I understand that part. The question is whether you have tried to etch an miniature antenna on ceramic substrate with a much higher Q than air. I mostly designed microwave antennas and of course the wavelength was much shorter as I recall about 10.5" in the 2.4 GHz ISM band. I routinely made antennas that made postage stamps look big, some had a forward gain or 5-6 db. like the size or smaller than the patches in GPS units.
Jim
Posted by: Dryer

Re: Communications form Mt. St. Helens...amateur radio - 01/28/10 10:41 PM

Jim, I've made antennas etched on printed circuit board...log periodics, mostly...for use in the 1.2 ghz band and for cell phone boosting. In fact, I have a dual band one setting here on the desk for cell phone about 4" square. My dad etched much smaller antenna patches for satellite telemetry back in his day.
Posted by: phat

Re: Communications form Mt. St. Helens...amateur radio - 01/29/10 05:34 PM


See, I think that is all amazingly cool - But everything I've ever read about getting an amateur license makes it look inordinately complex.

There are places I go that I'd carry that.
Posted by: Dryer

Re: Communications form Mt. St. Helens...amateur radio - 01/29/10 05:41 PM

Phat, for that *grin* license level (uhf/vhf) you simply pass a 35 question test. There is no Morse code requirement at any license class, anymore (sadly).
I'm the test proctor for this area and most study is online now.
Go here:
http://www.rac.ca/
Then here:
http://www.rac.ca/en/amateur-radio/beginner-info/getting-started.php

Find a club in your area. Really easy yet useful stuff!
Posted by: Jimshaw

Re: Communications form Mt. St. Helens...amateur radio - 01/29/10 07:49 PM

phat, Dryer,
This is true. Samuel Finley Breeze Morse is buried in my families burial plot in Illinois, my mothers grand mother was a Morse. They always called her grandama Morse surprisingly enough. When I was a kid I was very proficient at it.
Jim
Posted by: Dryer

Re: Communications form Mt. St. Helens...amateur radio - 01/30/10 10:41 AM

Quote:
my mothers grand mother was a Morse.


No kiddin'? That's cool, Jim! I'm an avid code operator. It's still the most reliable mode of radio communication and the first "digital" mode. It was a sad day when the FCC stopped requiring Morse code for ham licenses. Not only was it a right of passage, it was/is invaluable training.
The decision of the FCC to eliminate code was yet more dumbing down of license process. Morse is fundamental to radio and signaling.
Posted by: phat

Re: Communications form Mt. St. Helens...amateur radio - 02/01/10 04:58 PM


hmm.. that almost looks worth doing..

Particularly since it means I could pretty much do that on any trail I hike.