Hi Gary and Roelof.
Thankyou for your very useful comments regarding
the positioning of the PA0RDT Mini-Whip, I am fortunate that the radio room is
remote from the house and has a separate eathing system. If I increase my 500kHz
ERP to 1W, will I still be ok, or will protection diodes be required on the
input FET gate?
----- Original Message -----
Sent: Tuesday, December 22, 2009 10:13
Subject: Re: LF: PA0RDT Mini-Whip
I have my Mini-Whip mounted with a short length of PVC tube on an1.5
metre aluminium stand off arm attached to my main steel (100mm square) mast at
about 9 metres high. The coax runs down the mast & about 25 metres into
the house. The coax braid is grounded at the base of the mast were it enters
the garage. I use that for my grabbers (off at the moment due to technical
reasons) & it operates quite well.
Gary - G4WGT.
2009/12/21 Ken <[email protected]>
I have been reading the recent posting regarding the
PA0RDT Mini-Whip earthing etc, and am becoming rather confused.
I am hoping to construct a Mini-Whip over the Christmas break, but
have issues regarding the positioning of it, the original drawings show it
on a non metallic mast, if I mount it high it will be within 2m vertical
separation and a 3m horizontal separation of the top horizontal section of
the antenna, the other option would be to mount it 1m above ground which
will give a 8m vertical separation and a 4m horizontal separation. Just to
add further problems if elevated vertically it is very close to vegetation,
and at the 1m position it will be close to the neighbour’s chain link fence.
The Mini-Whip will be connected to the shack with approximately 25m of 50
ohm coax. Your comments will be gratefully received.