Please fill out the study group's full description. In this page you could:

• The purpose of the study group is to bridge the gap between the radio engineer's handbook and the parts and pieces on the work bench, and get a useful result, somethat that actually works, and meets the design engineer's goals in performance without math and simulation models, thru prototyping, testing, and measurements.
• Our learning goals are to break down the components of duplexers and antennas into logical components that can be tested, measured, and then combined into a working system.
• My role in this study group will be to moderate and guide.  I have been interested in and working around these topics since the late 1970's.  What initially interested me was the challenge - and the economic need to build what I could not possibly afford to buy. 
• What I hope to acehive in organizing this group is to promote a hobby that has been sidelined by cellphones and the internet, and acheive a very important goal, keeping the skills and knowledge of ham radio alive, because it's fun, and because someday the one in a billion chance catasrophe may happen, and where will we all be without the internet and cell phones?
• A ham radio license is requrired, or a commercial license, previous holder of 2nd radiotelephone or better, which is now a General Radiotelephone license.  A spectrum analyzer and tracking generator or at least an antenna analyzer.
•  I am well regarded as knowledgable and skilled in vhf and uhf duplexer construction, repair, and conversions. 
• Projected time to complete this course of study is a few days for conversions if you are already skilled in the art of radio and just wish to complete a duplexer or antenna project without a great deal of wasted time and effort.  Design and construction from scratch will involve several weeks of study.
• Other experts are welcome, RF EE's, and hams that are frequent contributors to the many newsgroups.