Randall said: Circuit Cellar did an article. Feburary 2010 #235 Page 38. This was a WWV simulator for a 2 part article the 2nd being a receiver. 73s Randall ZL2RJP
Yup, I read that. It didn't have the RF part of the TX. Magnus said: If you don't need a precision carrier, but rather a signal good enough for rough testing then you should not need to do that much other than cooking up a 60 kHz sine oscillator (maybe a simple cos/sin oscillator on op-amps will suffice) and let either a CMOS switch (4066) do the AM-modulation by shorting a resistor or enabling an additional resistor-path into a summing op-amp. Should not consume that many parts. Maybe add some damping stages such that levels can be controlled. Maybe a PIC to do the modulations trains and a serial interface to set it up. In all about 3-4 chips. Should not be too hard. Cheers, Magnus Yup. You're reading my mind. That's nearly exactly what I was thinking of. I was thinking of buying a canned oscillator from someone. Digikey and Mouser don't seem to have that freq, but Intl Crystal will custom-order one for you. Of course, one could go whole hog and put in an ethernet module and send the bits from a server. And add the nice display. And a pushbutton to switch between receiving the real signal and generating the local one and turning on the 60 kHz. I was just wondering whether anyone had built some version of the hardware so I don't have to. Tnx all, /Rcc _______________________________________________ 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.
