Question about FCC VOR rules

[CPD534]

Hi, I'm looking for any information regarding radio sites in close proximity to a FCC VORTAC station. There is a mountain close by with one of these on there and numerous radio sites both Ham and commercial. I noticed at the very top Where the vor is located the repeater sites only use one section of tower. I was wondering if there was a rule that you can not go higher than the vor antenna or if it's just due to them not needing it as they are already located on the top of the mountain.

Thanks for any help and or links.

[com501]

The FAA controls VORs. You may NOT interfere with the radiation pattern of a VOR, ergo the short antennas. There are other restrictions as well, power, frequency and emission types that are considered in those installations. If you are doing anything at that site, best to consult with the local FAA engineer before you tackle anything.

[W1HVN]

Try and contact a local Airway Facilities Tech. You will get more valuable info from a local tech whom knows the area,rather than regional or national contacts and less profile to you as well.

The beam pattern requires an unobstructed azimuth with a slant range upward emanating from the transmitter. The collocated DME transmits on UHF and as such requires more stringent obstruction requirements to it's slant range.

Hope it helps.

FYI Airways Facilities (aka A.F.) guys drive around with "tech ops" magnetic signs on their Gcars (usually small SUVs) if you happen to run into one in your area.

Good luck.