I don't think the "R2" means anything. I bought a WP-678 duplexer for a
GMRS station many years ago, and it was packed with an 8-page brochure
entitled, "Field Tuning Instructions for WP-678-2 and WP-665-R2 4-cavity
BpBr Circuit Duplexers."
The instructions are no different from any routine tuning procedure for
UHF pass/notch cavity duplexers. Moreover, the WP-678-R2 is a standard
UHF four-cavity duplexer for a 5 MHz split. Nothing special.
73, Eric Lemmon WB6FLY
> Hi Guys.
>
> I've found a Wacom WP678-R2, and am considering purchase of same...
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