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Cabling to FM Antenna

I need to cable up a high quality FM roof antenna. Answers to some questions would be a big help. The run is about 75 feet of 75 ohm coax and I will be using an antenna mounted amp. Questions: Is there going to be a big difference between using RG59 and RG6 coax? Can I bend it (gently) and install it into plastic electrical conduit with a 45 degree angle and a couple of right angles or is this a "no-no"? If conduit is a bad idea, how secure coax to run along roof facia and down side of outside wall etc.? Thanks in advance for some good advice
broimp

Showing 3 responses by eldartford

eldartford
4,262 posts
 
If you use an antenna-mounted preamp the wire down to the tuner is not of great importance.

Living in a fringe area, I found shielded 300 ohm twinlead to be the best (without using a preamp). I don't know if anyone sells shielded 300 ohm twinlead any more.
eldartford
4,262 posts
 
Albertporter...I guess you missed the SHIELDED part of my 300 ohm twinlead suggestion. When I installed a big FM antenna decades ago 75 ohm coax was not used: 300 ohm twinlead was what everyone used. However, while I live in a fringe area I am close to a busy road, and automobile ignition noise was a problem. This was solved by the shielded twinlead which Radio Shack then sold. This stuff is almost round (not flat like usual twinlead) and is filled with some sort of foam. The shield is a conductive film. The shield is left "floating" at both ends (not connected to ground). I thought this was surprising, but a friend who is a ham says that this is often the case. Anyway, the darned stuff works great.
eldartford
4,262 posts
 
Broimp...Winegard makes a signal preamp with 300 ohms in and 75 ohms out. This is probably the overall best you can do.
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