I have used a Palomar Engineers loop antenna, together with their loop amplifier, feeding the output directly to the input of my oscilloscope. I devised a programmable counter to divide the 5 MHz output of an HP10811A down to the group repetition interval (GRI) of my local Loran-C chain. The purpose was to calibrate the HP10811A.
It worked well enough for my purpose, back in the 1970s, when I was experimenting with "coherent CW" (CCW). --- Jim Maynard, K7KK Salem, Oregon, USA ------ Original Message ------ Received: Mon, 12 Nov 2007 04:11:59 PM PST From: "Didier Juges" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" <[email protected]> Subject: [time-nuts] LORAN-C antenna Speaking of Loran, I have an old Loran receiver (origin forgotten) and no antenna. Is it possible to build a Loran antenna? I understand Loran uses narrow pulses of 100 kHz, so the antenna must have sufficient bandwidth to let the front edge of the pulse go undistorted. On the other hand, there are lots of spurious signals at these frequencies, so some selectivity is probably necessary. I am not sure what design would be best. I have made ferrite bar antennas for other long-wave reception, but it was narrow band, so I am not sure these designs would work. I live on the Gulf coast of North-West Florida, and therefore I believe I am not too far from a Loran station, so I probably do not need extreme sensitivity. Any suggestion welcome. Thanks in advance, Didier KO4BB _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
