Re: LF: RE: Clemens on MF!!

[wolf_dl4yhf <dl4yhf@freenet.de>]

Hi Clemens,


Am 11.01.2014 22:58, schrieb Clemens Paul:
> The dipole is a horizontal 90°V, 8-15m high and according to EZNEC it has a 
> spheroidal
> pattern with no nulls.
Ok... that makes a difference.
> The vertical part of the feeder is only about 6m long.
So the rainworms will be cosy and warm around the lower parts of the 
antenna, hi..
> Tomorrow I'll check the impedance of the antenna aagainst ground with both 
> feeder wires
> connected
> and see if I can match it to 50 Ohm,dependent on the available parts.
That would be a good indicator for the ground conductivity.
At the local antenna farm, the total resistance (after compensating the 
reactive part with a series coil) went up from 26 to approx 35 ohms 
within a few months.
During transmit, I simply use the PE (plus possibly the underground 
cables) as counterpoise. During RX, the PE is disconnected from the 
antenna's own 'ground' which consists of a few buried wires, to prevent 
QRM from the mains creeping in. Another remote RX antenna is already 
planned, most likely it will be a small active loop or a system of 
crossed loops.
Cheers,
  Wolf.

( where is everyone .. now hearing only "  -...  ..  .-  "  ? )