back to coax and connectors

coax and heliax cable:




RG-8/X (RG-8/M, RG-8 mini-foam)

100'
3.5 db attenuation (50% efficiency) @ 140 mhz
7 db attenuation (20% efficiency) @ 450 mhz

60'
2.1 db attenuation (79% efficiency) @ 140 mhz
4.2 db attenuation (62% efficiency) @ 450 mhz






RG-8/U (Belden 9913)

100'
1.6 db attenuation (17% loss) @ 140 mhz
3 db attenuation (29% loss) @ 450 mhz


cushcraft 27 element
most directors are just under 10 1/4 "
one is shorter and three are longer, near the end

what model antenna is that from night owl?


coax spec sheets


coax_common.xls


coax.xls

coil length charts

UHF coax


big hardline:



highest resolution images
last updated 11/25/2025 at 19:03:02 by make_www_index.command version 2025.11.05.A