RFI

[nightrider]

whats the best way to prevent it ???????

 

[FL Native]

dont key up LOL

 

[Carl]

good quality coax and connectors, keep the limiter intact, keep power down, run a aluminum antenna high up, ground everything to a buss bar and ground that to your main electrical ground, and as fl said dont key up.

if you are comming across speakers use some torrid chokes, if you are comming across phone lines than try filters at the phones recivers.

if you are talking tvi like commong across a tv or vcr you can try filters as well, and take you coax just before your antenna and loop it 6 wraps around a duct tape roll or similar sized roll for a good working trap.

by far the worst antennas for rfi/ tvi are the anntron99/ imax99
followed closly by the shakespear army big stick and in 3rd place the solarcon imax 2000/ max 2000. those mini base antenna's can be even worse as they are mounted so low.

the best way to prevent it is with a beam 50' or more away with the problem area's on the backside or minor lobe area . the i10k, maco v5/8 -5000/ and stardusters are fairly good at elimminating most if not all interference problems.

 

[FL Native]

ok ill be serious for a few. depending on antenna. but probly a good idea for any vertical antenna, is to isolate the antenna from the mast with a non metalic material. to keep the mast from radiating. example: fibreglass stick. to keep the mast from radiating and/or becoming part of the groundplane/counterpoise.

if its an unbalanced antenna such as the imax or maco 5/8. make or ad a choke balun to the feed point to keep the coax from radiating.


aswell as grounding everything else as metioned above.


:beer

 

[Switch Kit]

are we having fun yet ? (-:

 

[Unit 194]

Try to mount your antenna as high of the ground as possible and as far away from your neighbors home as possible.
Don't run excessive power and ground everything in your station. Good Luck.

 

[nightrider]

ok thanks for the replys, at 10 feet with an antron 99, big problems, now at 22 feet, grounded with a 6 foot ground rod, and a cobra 29xlr, 203klv running 125 to 150 watts no complaints !! the feedline is above everyone's roof line, now mind i live in a trailer park, i have asked several neighbors and no tvi or rfi to report, radio was tuned by justin at commucation experts and is really clean im curious now if i go flatside and point southwest what it would do because that would pointing right at everyone ???

 

[bushwacker]

ok ill be serious for a few. depending on antenna. but probly a good idea for any vertical antenna, is to isolate the antenna from the mast with a non metalic material. to keep the mast from radiating. example: fibreglass stick. to keep the mast from radiating and/or becoming part of the groundplane/counterpoise.



That certainly helps with antrons and other fiberglass antennas-- and that seems to be the problem exactly.. " the mast radiating"