A 5 Mhz AM transmitter that can modulate 100Hz and 1000Hz, putting out a few milliwatts, would be perfect. I know little about analog electronics. Someone else will have to do that part.
On Feb 1, 4:41 pm, Cobra007 <[email protected]> wrote: > If I were you I would spend a little bit of time to work out how a > simple WWV transmitter can be made. It really is only a small step to > go from the point where you are now. It's a beautiful clock and if you > have a GPS to WWV converter (RF), the clock can be used globally and > is still doing the thing it was designed for, it's just that it is a > local WWV station :-). > > They probably use AM or SSB, I drafted a (very) simple schematic just > to show you how simple this can be done. Sure you will have to work > out the rest of it, but this can be used as a very basic AM WWV > transmitter. SSB would be quite simple as well by multiplexing the > 100Hz and 1000Hz tones at the carrier frequency, effectively omitting > the carrier itself this way. > > http://xiac.com/Images/WWV_AM.jpg > > Michel > > On Feb 2, 4:24 am, Mitch <[email protected]> wrote: > > > > > > > > > Works! Thanks for the help and comments. > > > It didn't work yesterday because I used a data array from a simple Arduino > > sketch that I found on a forum. Most of the elements were in the wrong > > positions, maybe it was for a different IRIG spec. It doesn't seem to > > matter if the first frame at 0 seconds (the hole) is 1.03s, not sure why > > they did that because it shifts everything else forward by 30 milliseconds. > > The GC-1000 syncs equally well with and without that delay. > > > It takes four data frames to set the time. Updating the time took five > > frames the one time I checked, not sure why. Maybe it was because the same > > frames were repeated and the time difference was so great. > > > Next I'll work with a GPS receiver and the Arduino's C++ Time.h library to > > get everything working. I will use an old RS-232 connector to hold both > > jacks for the GPS, and also for a mini-usb connector so that the Arduino > > sketch can be updated without opening the case. Only four wires will be > > connected to the clock, and the modification is easily reversible. > > > A low power WWV transmitter would be great. That's beyond my skill level, > > so this will suffice unless someone else designs that part. > > > Mitch -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
