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Despite the length of this video (86 minutes), the information offered by Josh Nass ("Ham Radio Crash Course") is worth the time.
The video digs deeply into antenna baluns, UNUNs, and Toroids--things radio amateurs use daily to improve their antenna systems.
The video is a bit tedious, owing to the online chat format of the program, but the small asides are worth the wait considering the amount of valuable information contained in the video.
Here are some general comments from Josh:
Thanks for joining us today.
Aloha es 73 de Russ (KH6JRM).