Ed, I had 70F2 Ghz stuff & later 79F2 2Ghz.... I worked for a natural gas pipeline company back in the day. Took care of 7 of 27 hops along a 600 mile route from Red Desert in WY to Hesston, Kansas where it joined our mainline. Also installed 6 VHF repeater w/autopatches a very big deal in 1979... 73 Jim AC0E