I've used 6' diameter, single-turn-of-hardline loops on 80
and 160 for many years ... with simple transistor amps built
into the termination boxes ... and fed via (cheap) CATV type
RG-59 over hundreds of feet. Two have been powered 24/7
for over 20 years (!).
Yes, if built carefully they have VERY deep and narrow, but
equal nulls off the sides ... or put another way, along a line
through the loop. I found there's little (no) need to rotate them
UNLESS you want to use the null to attenuate the signal
from a nearby station ... as in a contest situation.
A word of caution ... if building for transmitting, the currents
in the loop ... and the tuning capacitor ... will be extreme.
There will be heating and since the Q is so high this will
result in drifting of the resonance point. This is the main
headache for transmitting loop builders.
I had the use of AEA's very first production-line loop many
years. It worked very well.
73! Ken Kopp - K0PP
[EMAIL PROTECTED]
or
[EMAIL PROTECTED]
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
