This tutorial covers an introduction to RF, wireless, and high-frequency signals and systems, includes explaination of what is RF, why operate at Higher Frequencies, Frequency Shifting through Frequency Mixing.
FTRestore is a free Windows desktop application to upload, download and compare memory channels and menu settings in the Yaesu FTDX1200, FTDX3000 and FT-991/FT-991A model transceivers.
About The DXZone
The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio, currently lists 20.000+ links organized into 600+ categories and subcategories. Ham Radio operators review new sites every day since 1998, for potential inclusion in the Directory, and to evaluate the best place to list them