old motorola ? the type that you still find on the back of some scanners?

The kind you're refering to is an RCA jack, I think. From the looks of the
plug, it appears the end of the coax would have to look like the cables you
plug into your TV or VCR's A/V jacks.
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73! de Andy KC2SSB - WPYI880 (GMRS)
Beachwood, NJ USA! Grid FM29vw
http://vhfradiobuff.tripod.com