Source for this project : http://www.vlf.it/easyloop/_easyloop.htm

Parts are recycled except for OP27, socket, PC board material, and BUD box.

After testing the range below 20Khz plan to mod for loran-c coverage at 100khz.
Mods to try is to feed back cap (330 pf) and input caps.



Loop antenna is a degauss loop from a junked 27" TV set used as is no idea about number of turns but it has a DC resistance of 7 ohms close to Renato IK1QFK description in the link above.

Added DC blocking and a RF choke to allow feeding DC via the coax.  Current supply from receiver is 8 volts.

First test looks good as it preforms better than a standard commercial Loran-C 8'whip and coupler.