Stefan;
The voltage is terrible! I can draw a 2.5 inch flame off the ant input. I am cramped for space to the west as I am only 20 feet from the neighbors line. I am on 4 acre lot and room in all but that one direction. More top loading would be great but also use this ant for 80 and 160 meters.
I have seen the 700' Loran C tower up close and it uses the three top guys as top loading. It used to wipe out all but the 500 kHz band here. I could use 185 and did for awhile because 137 had terrible splatter from that signal.
You can go to google maps and get a real good shot of this place. Last I looked the tower shows up and house with cars in driveway even. If not I can take couple pix for you. coordinates "NL 42-40-05 ; WL 77-04-28"
You are probably using a much bigger ant than what I have here. A couple hundred footer would sure help for 137/73-Bob
Date: Wed, 25 Sep 2013 15:21:20 +0200
From:
[email protected]To:
[email protected]Subject: Re: LF: TA CW?
Hi Bob,
Am 25.09.2013 03:01, schrieb Bob Raide:
[...]But only have a 90' high tower and at the top is
the center feed point of my 75 meter double extended zepp. I simply
short the open wire line which runs almost vertically and fed it with
allot of inductance in series! I assume the two 150' legs acts as top
loading. Ground system is from my broadcast experience where for field
intensity surveys 36" wide chicken wire was used with a 100' tower most
often and a 250 transmitter. Eight 50' chicken wire radials produced
decent field on the midband channels [1000 kHz or so] to measure from.
Here I am using several 150' radials of chicken wire radials. I hope
to stretch some out to 300' but that's going to be about it at my
location.
Can you post a link to some photos showing the tower and environment ?
Do you use deep earth rods additionally to the wire radials? Can you
add even more capacitive load to the top of the tower, giving an
umbrella antenna. 600 pF, as Alan sais, is nice but not much on 73 kHz
and you seem to be voltage limited now (like me, sometimes :-) ).
Some images would be interesting for us i think.
73, Stefan/DK7FC
