Hi Wouter: I'd be interested in learning what you find in the way of LORAN-C kits. Note that the LORAN-C signal is made up of pulses so a receiver needs to have the bandwidth to pass them. I built a Group Repetition Interval (GRI) generator some decades ago. It was a divider programmable using 3 thumb wheel switches. When the GRI pulse is used to trigger a scope all the pulses in that chain stay still and all the other GRI pulses appear at random places. The master station has more pulses in it'sgroup than the slaves so it's easy to find the master. Then by measuring the time delay between the various pulses you can find you position. With my crude setup the location was within maybe a mile. For circuit diagrams using mostly discrete parts I have a CD-ROM with many Austron manuals for sale at: http://www.pacificsites.com/~brooke/A2100F.shtml#Man Note that although the LORAN-C system was designed for coastal navigation it can also be used for precision timing. The AUstron 2100T receiver is designed to do this and when receiving a nearby station works about as good as GPS. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Message: 56 Date: Fri, 20 Jan 2006 14:09:20 +0100 From: "Wouter van Ooijen" Subject: [EE]: loran C To: "'Microcontroller discussion list - Public.'" Message-ID: <000501c61dc2$ba56cef0$0b00a8c0@PAARD> Content-Type: text/plain; charset="us-ascii" Are there any do-it-yourself Loran C receiver designs available? Yes, I did google, but found one. Wouter van Ooijen -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist