Lets see, for 70cm, that'd be about 6 inches. Lots of insulators! For 2 meters that'd be about 19 inches, not quite so many insulators. About 680 of'em for 70 cm, only about 215 for 2 meters. That's assuming just three guys at the 80 foot level. Figure thimbles and maybe 8 inches of overlap length per insulator, and at least 4 clamps for each insulator. What's that, maybe a nile and a half of guy cable, about 300 pounds of clamps, insulators and thimbles. Hope he's got a long bed heavy half ton to haul that stuff, sure don't wanna think about the shipping.
Or just do it the easy way. Put them 2 meter and 70 cm antennas on a 10 foot pole out of the top of the tower, and don't worry about it.
- 'Doc
HF is a lot easier with them insulators and stuff.