[PVRCNC] Coax window feedthrough

[aa4nc at aol.com]

Is anyone familiar with commercial coax window feedthroughs? I need to run a 50 ohm coax through a window. The 50 ohm feedthroughs are about $60. You can buy the 75 ohm CATV type for about $2. I'm thinking there really isn't much difference...Both look to be two parallel copper or aluminum strips, about 3-6" long.
I'm going to use it for an 80 meter OCF dipole / 100 watts.
Any thoughts?
73,
Will AA4NC