They must meet there purpose and seal to a reasonable extent to bulge before they 'blow'. Then once the grease can pass it seems there is a route for it to leek out and for water to pass the other way.
I guess if your seal is poor to start with it won't make much difference and also if you fill it often enough it won't matter...
I don't think there are that many grease nipples on a TD5 ... the ball joints are all sealed.
when you pump the UJ's just do it until it bulges - if you see grease coming out the end it means you've blown the seal.
I presume it must be able to read the SWR? Where if the reading on Channel 1 is greater than the reading on Channel 40, your antenna is too short and you'll need to lengthen it. If the reading on Channel 1 is less than the reading on Channel 40, your antenna is too long and needs to be shortened.
It is a fabulous spot
I've had great experiences of some of the people here - and loads of help from people too. Everyone is so generous with giving help and information.
Its a brilliant resource.
Thanks to everyone.
That sounds a decent set up. Any chance of a pic please?
One of the reason's I'm not sure mounting it outside is that it seems ripe for damage there. I can just imagine it being smacked by a sprung branch...
Incidentally what range and type of gauge are people using?