Didier Juges wrote: > >Is it possible to build a Loran antenna? > > Yes.
For my Austron 2100 I built an active ferrite rod antenna which works very well. Much better than an active rod since by using the magnetic field component, it rejects a lot of the local interference (tv timebases and computer monitors etc.,) that the rod picks up. I am several hundred miles from my nearest Loran station however, so the signal is not that strong... I filled a ferrite rod (from an old BC receiver) with a bifilar winding of wire wrap wire, parallel C to resonate at 100 kHz and the center tap grounded. This feeds the gates of a two FET push pull amp, the output of which is transformed into a medium / low impedance to feed the Rx. 12 Volts DC power is multiplexed onto the coax feed line. As is, it was too selective, but a 10 k Ohm R across the antenna rod seems to be enough damping for it to work well. I also use a similar one for WWVB, but here you need all the selectivity you can get and it is in fact so selective that some temperature compensation was necessary. Not a major project, and it fits neatly into some bits of plastic plumbing, a lot smaller than any wire loop would be. Dan ac6ao _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.