For those interested, I have just uploaded a new page to my LF Loop page. It is a description of Ralph Burhan's shielded LF loop and preamp. Steve Web: "THE VE7SL RADIO NOTEBOOK" at http://www.imagenisp.ca/jsm [L.F. Loops *update] [Tuna Tin DX] [H.F. Maritime DX] [Crystal Radio DXing] [136 kHz Band] [* updated*NDB DX]