"Reg Edwards" wrote in message
...
One of the most serious sources of error will be pick-up on the long
line between the small loop and the receiver. With a coax line there
will be a greater signal pick up on the coax braid than there is in
the loop. They are both located in the same field.

So best to use very low impedance balanced pair line such as 50 ohms
perhaps with a screening braid. A good choke balun or a 1-to-1 wound
transformer would be advisable between the line and receiver input.

Also, depending on frequency, length and impedances, there may be
standing waves on the line which could make a mess of your
calculations.

A change in line length is a good way to check for errors of this
sort.


Wouldn't it be better to use a pre-amp at the loop feed? The gain of the
pre-amp could make line pickup a negligible effect, and the pre-amp would
match the coax very well.

--
Ed
WB6WSN
El Cajon, CA USA