[Elecraft] K3 aux receive antenna input

[Jim Brown]

On Thu, 12 Feb 2009 09:32:44 -0800 (PST), KC2UEE wrote:

>It's a bit on the expensive side, but from its design, should work well.

A bit? $380 plus tax and shipping is a lot to pay for a box that replaces 
something you can build for a few dollars!  Unless you're hoping the loop 
will reject RX noise, a hunk of wire works fine with a K3! And a loop will 
reject ONE noise source at a time. 

Your money would be far better spent on a copy (even an older one) of the 
ARRL Antenna Book, which includes several receive loops you can build. 
K9AY has an extensive website devoted to RX antennas, and N6RK has also 
published a nice design that's easy to build. W8JI's website includes info 
on winding matching transformers for RX antennas. My website includes info 
on ferrite chokes to minimize RX noise (and lots of other tutorial 
material in RFI).

73,

Jim Brown K9YC