VK2CU wrote:Hi All,
As for tails, this is the way the professionals do it anyway, if water gets inside your antenna/balun, it may wick its way into the coax run. A short tail of RG214 prevents this. Replacing an antenna & tail on a tower is a lot easier than having to unclip and re-install 50m of coax - and the cable hangers are NEVER near the ladder! Also the 1m tail acts as a "sacrifical coax" for your neighbourhood cockatoo terrorist team! At the other end, the coax should go through a lightening arrestor block anyway, so a tail is needed at that end as a matter of course.
Don't forget to attach the LDF to earth(Structure) at the top, at the bottom(Where it changes plane) and before it enters the building. If you don't want the expense of buying an earthing kit, just strip off section of the outer jacket, and use a SS hose clamp and shove your earth wire under it.
Is the big fella cleaning out the "shed" before Wyong? Sounds like he is lucky to have a ham on board...
Not sure about your comment on the RG214 sacrificial tail at the antenna- I haven't seen any rigging firm do that on jobs I've been involved in. What you say has merit in terms of water ingress, but it introduces an extra point of failure- connectors. You win one way, and lose in the other. As for the cockies while they like the antennas as a great source of a perch & cure for boredom they will chew all the way down to the cable tray- had an attack up near Moree where the feeders were ringbarked all the way down the tower.
The grounding you suggest is standard practice, or should be. It was published in the Andrews cabling catalogue which should be the bible for any rigger/antenna installer. I've always insisted on that, except for the grounding kit near the cable entry plate (normally only used where the horizontal run in tray is particularly long).
I'm trying to get to Wyong this year... might throw some LDF4-50 on to your pile for disposal! That might make my other half happy...