I have found a cheap and cheerful solution without spending big money. I have many old studio/portable lighting/camera tripods in storage. This one is portable and ultra stable. It can extend up to 2.5m. So I have a 8.1m telescopic whip that can be taken to the woods in the summer. The giant variometer with ceramic stand0ff was cheap on ebay ( i only paid £9 for it) and its Q can beat the £470 commercial rig's loading coil left, right and centre