March 2017 Club Meeting - "Yagi-Uda Antennas"

Friday, March 17, 2017

7:00pm MST

Ascension Lutheran Church 1220 West Magee Road, Tucson, AZ

 

Handyman Corner

Presented by Tom, W8TK

"Build your own test equipment"

 

Yagi-Uda Antennas 

Yagi Uda

Presented by Gary Thiele, KD8ZWS

The Yagi-Uda antenna was invented in Japan in 1926 and saw use in early WWII as a VHF radar antenna.  In 1943 the (classified) invention of the Magnetron enabled the Allies to develop airborne radar at centimeter wavelengths (for which other antennas were more suitable). The technological advance of allied airborne radar contributed significantly to the demise of the German U-boats.  After the war, the Yagi-Uda became a favorite Ham antenna.

The talk, in four parts, will: 1) trace the historical development and use of the Yagi-Uda;  2) reflect on some personal experiences; 3) review some antenna basics; 4) conclude with a brief technical discussion that will show why the director and reflector elements are configured as they usually are, and why the antenna has narrow bandwidth, among other characteristics.

Gary Thiele is co-author of the book “Antenna Theory & Design,” Wiley 1981, 1998, and 2013 (822 pages).  The text serves both the academic market and industrial users.

February 2017 Club Meeting - "10 Meters"

Friday, February 17, 2017

7:00pm MST

Ascension Lutheran Church 1220 West Magee Road, Tucson, AZ

Handyman Corner

TBA

 

10Ideal

PSK10 

Presented by Keith Schlottman, KR7RK

Whether you are a brand new ham or a seasoned radio veteran, you have access to the 10-meter band. In addition to being the only HF band with Technician class license privileges, 10 meters has many other unique features that truly make it the IDEAL band for all amateur radio operators! Keith Schlottman, KR7RK, will show actual current examples of how many hams are taking advantage of 10 meters. Keith is the Treasurer of 10-10 International Net, and has been a 10-meter enthusiast for 25 years. He has presented forums at Dayton and the ARRL SW Division Convention. This talk will include information about how you can get the most out of 10 meters even during the low point in the solar cycle and even if you live in an antenna-restricted community, as well as how to take advantage of some local 10 meter opportunities in the Tucson and Oro Valley communities.

After the meeting, we will do a brief "parking lot net" to allow anyone interested to make some 10 meter contacts using mobile and portable stations.

January 2017 Club Meeting - "Operating Above 50 Mhz"

Friday, January 20, 2017

7:00pm MST

Ascension Lutheran Church 1220 West Magee Road, Tucson, AZ

Handyman Corner

Presented by Tom, W8TK

"Make a keyer paddle for $1"

 

Operating Above 50Mhz

70cmDec2014 1535 

Presented by Steve Bell, KJ7OG

VHF, UHF and Microwave frequencies are easily used if you have the right antenna and the ability to assemble a small station. It’s not difficult but it takes some commitment and a desire to operate on frequencies above the 50 Mhz (6 Meter) ham band.

Steve Bell, KJ7OG will be our featured speaker for the January meeting where he will talk about the world of VHF - UHF - Microwave operations. Steve will share his expertise in getting a station on the air and EME (Earth Moon Earth) operations. Recently Steve participated in an annual 10GhZ terrestrial contest from Mount Lemmon.

With the HF bands becoming more quiet as a result of the sunspot cycle, VHF - UHF and EME operations might be good alternative places to operate.

About Steve

Steve is a retired Electronics Engineer and a regular OVARC member. He was first licensed on 1993 as KB7TRZ. Steve was a key contributor on several University of Arizona MARS missions including the hugely successful MARS PathFinder camera.