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Mode JA Filter




Filter Kit
Duplexer idea sounds good, but if you want a  Mode J filter with three
tuned circuits try the kit from Amsat-DL.
I bought one a few years ago. All parts supplied, including a tinplate box,
good quality N type connectors and a waterproof enclosure. 
Easy to build and >60d  of attenuation at 145.850MHz.   Very easy to tune
up with out test gear. Use your receiver and tune for minimum signal at
145.850.

73 John G7HIA
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