#48 UHF homebrew duplexer cavity build and testing
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#49 UHF duplexer 2 Coffee Overload!!
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Uncover the Secret Behind Ham Radio Duplexers
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2 Meter Hybrid Ring to BPBR Duplexer conversion
20:01
Re-tuning A UHF Repeater Duplexer Part 1
18:44
70cm/gmrs groundplane build
21:24
Rapid Prototyping RF Filters with Tape & QUCS
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Telewave TWPC-1505 Band Pass Cavity Tuning
29:24