I think most would assume he meant for similarly sized cables.

Since I don't know the physical differences between RG-8, RG-8U, RG-8X and
RG-213, I wouldn't know that he meant similarly sized cables.
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73! de Andy KC2SSB - WPYI880 (GMRS)
Beachwood, NJ USA! Grid FM29vw
http://vhfradiobuff.tripod.com