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Guidance for Getting Started in Weak Signal VHF/UHF Program

49th Annual CSVHFS Conference
Guidance for Getting Started in Weak Signal VHF/UHF
Operations Program – (“VHF+ 101”)

Papers and presentations for this program are, by definition, basic in nature. The target audience is anyone from the newest 10 year-old licensee to the oldest, most grizzled HF operator who has worked everything there is to work on HF and is now looking for something new in Amateur Radio. Possible topics include the basics of VHF & UHF propagation, and include answers to questions like:

1. What is meant by “line of sight” propagation? Why doesn’t this really mean “only as far as you can see”?
2. How does the propagation differ from HF, and how does it change from band to band as frequency increases to mm wavelengths?
3. Why do we use horizontal polarization for weak signal work and vertical for strong signal (e.g., FM) communication?
4. What are the problems with communicating when one station is vertically polarized and the other is horizontally polarized?
5. Why is construction of VHF/UHF antennas, linear amplifiers, etc., more exacting than at the HF frequencies?
6. What do “SWR”, “Return Loss”, “Reflected Power”, “Mismatch” really mean and how do they apply to transmit systems, and specifically to antennas?
7. etc…

General guidance provided for presenters and authors applies.