Build-It: Yagi Antenna Workshop
Antennas - An Overview (Joe, WA8OGS)
Joe, WA8OGS email: gojoe55@gmail.com
21 March, 2019
Build-It #1 Survey Results
Building VHF Yagi - Materials Handout (2 pages)
References for Antenna Modeling Software
Start Building - Hands On (group)
Click to download presentation
Tuning & Testing Your Yagi (Tom, N8ZM & group)
Click to download presentation
Antenna Gain Measurement (Tom, N8ZM, & group)
[maybe Saturday, 10am - 2pm; include lunch?]
Click to download presentation
Antenna, An Overview References
The following links open in new tab:
Antenna Designs, Construction, and More: http://dg7ybn.de/index.htm
Yagi Antenna Designs: https://g0ksc.co.uk
DUBUS Links: http://www.ifwtech.co.uk/g3sek/diy-yagi/index.htm
Yagi Calculator for DL6WU style yagis for VHF/UHF (2015): http://www.vk5dj.com/yagi.html
"Yagi Antenna Design", by Jim Lawson, W2PV -- No link, this is a textbook to purchase.
"Physical Design of Yagi Antennas": http://www.realhamradio.com/Download.htm
Yagi Antenna Desigh NBS Technical Note 688: https://tf.nist.gov/general/pdf/451.pdf
Some Yagi Building Videos
KD4MXA - Building a six meter Yagi
1.2 GHz Yagi
Homemade 70cm Yagi Beam Antennas - M0UKD
High Gain TV Yagi
Balun Overview and Testing Baluns References
Articles on the web:
Measuring Baluns (common mode):
“A Ham’s Guide to RFI, Ferrites, Baluns, and Audio Interfacing”, Jim Brown, K9YC: (MUST READ!)
http://audiosystemsgroup.com/RFI-Ham.pdf (updated January 2019)
http://k9yc.com/2018Cookbook.pdf
“Baluns: what they do and how they do it”, Roy Lewallen, W7EL:
https://www.eznec.com/Amateur/Articles/Baluns.pdf
Also published in the ARRL Antenna Compendium, Vol. 1
Baluns: Good, Bad & Ugly
http://www.w7az.org/sites/default/files/Baluns.pdf
Baluns 101: Learn just enough to be dangerous!
http://www.hbphoto.com/Radio/Baluns_101.pdf
Don’t wind chokes on RED toroids (powder Iron) by IZ2UUF
https://www.iz2uuf.net/wp/index.php/2017/05/09/dont-wind-chokes-on-red-toroids/
“Measurement of Common Mode Chokes fabricated from Type 31 material toroid cores”
G3TXQ's web page talks about common mode chokes and provides information as to why the chokes should be selected such that the "R" value is higher than the "X" value. He explains why.
http://www.karinya.net/g3txq/chokes/
This explains how he calculated the values.
http://www.karinya.net/g3txq/chokes/s21.pdf
YouTube Videos:
These cover various topics on electronics and Ham Radio
W2AEW
https://www.youtube.com/user/w2aew Click on “Videos” on the menu line. There are around 300 videos. One of the best YouTube channels.
TRX Bench
https://www.youtube.com/user/TRXBench/videos
Around 200 videos
EEVBlog (out of Australia)
https://www.youtube.com/user/EEVblog/videos
Over 1100 videos. Does a lot of equipment teardowns and evaluations