In message , Robin Prater
writes

I do not have an ARGOS catalogue but cost usually depends on the number of
directing elements i.e. how long it is. If you can see the transmitter you
won't need the expensive one. If the signal strength is poor get the longer
one. A clue might be to have a look outside and see what everyone else is
using.

I do not like the word splice! when dealing with these frequencies. You
should use a good quality low loss cable from the aerial to feed a small
distribution amplifier and then the other circuits. Each cable should be
properly terminated with a co-ax plug. All the bits can be bought from
MAPLIN.

Or more cheaply from CPC
--
geoff