Hello Mal,
What size
and type of wire do you use in your loop??? Do you know the AC resistance of
the loop??? These are very important parameters, as Wild Bill would point out.
Maybe your loop has a very high Rac and this is why it performs poorer than
your huge vertical. Anyhow, let us know the wire size and such and we can
understand a bit more what you are using.
Thanks es
73’s,
Mike>WE0H
http://www.we0h.us/lf.html
185.3026kc QRSS-30 & CW@15wpm
ID is "WE"
-----Original
Message-----
From:
[email protected] [mailto:[email protected]]On Behalf Of hamilton mal
Sent: Monday, October 07, 2002
11:46 AM
To: [email protected]
Subject: LF: Lasso alias loop
What us
folks in the UK and Europe must remember is, that the USA boys are biased
towards loops(lassos). They were brought up on the ranches lassoing cattle and
naturally when it comes to radio this is the way they think, and its hard to
convince them otherwise.
Although
my 90 metre loop (natural resonance) is good it is not a patch on my vertical
system.
The
loop also has the disadvantage of being bi-directional, whereas the vertical
captures signals from all directions.
I find
on receive the loop is well down in its favourite direction from the vertical
and on transmit poor.
I am
not exactly comparing like with like because the loop is 90 metres and well
elevated, but my vertical is well over 100 ft and supports 3 x inv L antennas
each one 100ft plus, vertical and at least 300 ft horiz. Total inductive base
loading is less than 0.5 mh on 136 khz. I intend to improve on this
configuration when I get the time. The ground system consists of several 300 ft
plus insulated radials. Both the vertical and loop are matched to 50 ohms and
fed with 50 ohm cable to the shack where all the equipment is designed for 50
ohms.The antennas and base feed are some hundreds of feet away from the shack,
away from any possible domestic electrical noise.
I think
the roundup days are over in America and they ought to try some verticals on LF
The
next steamer leaving Belfast for Baltimore/Philadelphia is in 3 weeks time and
I might send over some verticals. This service has been operating since 1823
and is reliable, still using sails.
73 De
Mal/G3KEV
