We all should know the benefits of salt water and antennas…. but salt water AS the antenna……

Filed Under (Antennas, YouTube Antenna Goodness, YouTube Goodness!) by Jonathan on 15-09-2010

OK, I just had to post this.

I’ve experimented with saltwater when operating portable (one of the benefits of living about a half hour from the shore).  I know friends that have made antennas using salt water, and they had great luck.

This guy, took the idea and spun it on it’s head.  Check out the induction as well – SWEET!

Understanding directional antennas

Filed Under (Antennas, New Ham Primer, YouTube Antenna Goodness, YouTube Goodness!) by Jonathan on 15-02-2010

There have been a few videos and posts here on the topic.  This video takes a different approach.

Many know Diana Eng from previous posts on on working satellites.  Here she tackles the fundamentals of directional antennas.

She often splits her “geekdom” between radio and “technology clothing”.  You can find more about her on the Make: and Craft: websites.

http://makezine.com/

http://www.craftzine.com/

Seriously great antanna analyzer information from down under (mostly)…..

Filed Under (Antennas, DIY Electronics Projects, Kits, New Ham Primer, YouTube Antenna Goodness, YouTube Basic Electronics Goodness, YouTube Goodness!, YouTube Homebrew Goodness) by Jonathan on 22-01-2010

Man, sometimes a topic starts going through your head, you do a little research and then start going all over the place.  This is one of them – antenna analyzers.  I’m a huge fan of them and run antenna clinics for our local club.  This tool is one quick way to get a snapshot of your antennas performance in a jiffy.

For those that have seen the MFJ analyzers, they basically consist of a low power transmitter and various circuitry to do the math and display the antenna or feedline information on an LCD screen.

Oztales strikes again with a very well done video.  The descriptions should give hams without an engineering background a very strong understanding of what is going on behind this “mystery box”.

While I’m “down under” let me show you a really neat analyzer kit that can be had for a fraction of the cost of the larger analyzers like the MFJ.  If you’re willing to burn a little solder, you can make a very sweet analyzer (I’m thinking of getting this kit as well, seems a good companion piece to my AADE LCR Meter).  As of this writing, the kit mentioned here costs $150.00 AUD for DX orders – which is a bargain!

As you can see, it has many things in common with the higher priced analyzers as far as layout and such.  Just keep in mind, from what I’ve seen in the picture and on their site, this is an HF only analyzer and does not have six meters – strictly 10 and up.

The kit is available from the South Coast Amateur Radio Club and on their website at:

http://www.scarc.org.au/kits.html

But……….

Across the pond, someone built one of these kits and you can get a really good idea of what is inside the kit.  This video is what is now making me consider purchasing this kit:

BYRONLOCAL’s Youtube channel has a few other videos that may be part of the kit (components) but I haven’t watch them yet, so check his channel if you want more information.

While I’m “down under” let me show you a really neat analyzer kit that can be had for a fraction of the cost of the larger analyzers like the MFJ.  If you’re willing to burn a little solder, you can make a very sweet analyzer (I’m thinking of getting this kit as well, seems a good companion piece to my AADE LCR Meter).  As of this writing, the kit mentioned here costs $150.00 AUD for DX orders – which is a bargain!

Oztales has scratched the surface of what you can do with an analyzer.  If you practice your google-fu, you’ll find lots of other great uses/mods for analyzers to expand their capability.

Antenna Theory – another great video from OzTales

Filed Under (Antennas, New Ham Primer, YouTube Antenna Goodness, YouTube Goodness!) by Jonathan on 02-01-2010

This time I’ll keep it short and sweet.   “oztales” over at YouTube has a great antenna theory video.  Only runs about 10 minutes, but is packed full of good information.

This video would also make a great showing for new hams.  I run regular workshops and think this video will be in the normal offering.

Great work oztales!!!!

More satellite antenna projects/improvements

Filed Under (Antennas, Homebrew, Space Communications, VHF/UHF, YouTube Antenna Goodness, YouTube Goodness!, YouTube Space Comms Goodness) by Jonathan on 07-12-2009

OK, not to sound like Rod Serling, but…..

Today, I humbly submit, for your approval, an incredible AzEl project from Dave Matthews, KI4PSR.

Dave has submitted a project to Parallax (the microcontrolller/stamp  people)  This is a neat AzEl setup that you can build from off the shelf parts (mostly) that allows you to use your computer to track the birds as they fly overhead.

It doesn’t get easier than this, but the project seems really neat.  He lists the materials he’s using as well as sites where you can obtain parts.

Might I add, he also brings my favorite Ham Radio Deluxe into the mix!

For project info, schematics and such, check out the Parallax website at:

http://www.parallax.com/tabid/787/Default.aspx

That might be a bit technical for some, but here are some other great projects/mods I’ve found recently.

K7PAR has some tips for improving an Arrow (or Arrow like) antenna at:

http://www.qsl.net/k7par/Articles/ArrowImprovements.htm

KI0AG has a neat micro duplexer for the Arrow.  He specifies that this is indeed maximized for the Arrow antenna itself.

What makes his project neat is he really documented the information well, so it is incredibly educational.  Check out his project at:

http://k0lee.com/duplexer.htm

Finally, let’s not forget Randy, K7AGE and his mod to hold a dual band antenna.

As always, if you have more ideas, post them below.

Search:

KIX-Online Rss