145 MHz Low Loss Bandpass Helical Filter by Mile Kokotov - Z33T
145 MHz Low Loss Bandpass Helical Filter by Mile Kokotov - Z33T

http://www.ok2kkw.com/more/more/z33t_bpf.png

https://youtu.be/jBNcTn9BEy0

Courtesy OK2KKW


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