Hi MSA 6180 or MSA 8160 or ….
Bob On Jun 16, 2013, at 5:43 PM, paul swed <[email protected]> wrote: > OK no schematic. It was 2MB. But it was a scan of my notes. Happy to post > to a sight or two. Can include some pictures also. > Operation is simple the msa 6180 receives wwvb and in my case I tap off of 6180 > a wwvb antenna multi-coupler. > Output of the 8160 controls inverters that select a 60 Khz clock signal to 8160 > select high amplitude or low amplitude for the bit. > The 60 Khz clock uses another 60 Khz xtal from mouser or digikey. > The system consistently allows the Spectracom 8170 to work. Also my fear of > delay due to this processing is unfounded. > Compareing the wwv audio ticks and tones to the 8170 display I can't tell > the difference. Good enough as they say. > No attempt has been made to filter or shape the cmos output. The 8170 > filters do a fine job. > Use a low power regulator to drop the 8170s antenna voltage to 5 volts. The > system draws 13 ma. > > Other comments you could use a ferrite rod as the app note states. Or you > could feed power to the old spectracom antenna and use it. Essentially the > remodulator sits in the middle of the coax. This project assembled in a few > hours yesterday. The hardest part is soldering the pesky 16 pin soic to an > expander board. > The 8160 chip is available in the US through a distributor. But really not 8160 > sure how thats going to work out. > Literally any wwvb clock chip should be able to do this job. But no one > seems to sell them any more. > Hopefully the schematic will get through to the Time-nuts. > As always no intent to kit anything. > Regards > Paul > WB8TSL > _______________________________________________ > 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.
