On 28/10/14 20:33, rickman wrote:

I have a project in mind that would need a very good antenna in the
frequency range of 60 kHz. Originally I looked at loop antennas and
liked the idea of a large shielded loop made of coax tuned with a
capacitor. My goal is to get as large a signal as possible from the
antenna and matching circuit to allow the use of a receiver with very
low sensitivity... in fact an all digital receiver.

To my mind you seem to be over-thinking, and perhaps over-engineering,
this project.

I'm a string-and-sealing-wax UK-based Amateur, and my solution to a
similar problem was to take a simple approach: I put a one-turn loop
round the outside of a wardrobe and linked that straight into the
600-ohm balanced input to my receiver. That was enough to drop the local
noise levels by a dramatic amount, and was easily sufficient for my
purposes. Using an electric aerial, the signal was unreadable.

My suggestion is to start simple and find out if that is enough, and
make improvements one at a time. There could well be no real need to
have a computer-generated solution requiring high-grade components to
function.

Whatever route you choose, good luck!

--
Spike

"The greatest dangers to liberty lurk in the insidious encroachment by
men of zeal, well meaning but without understanding" Louis D. Brandeis