There is someone on ebay selling an analog 'movement' http://www.ebay.com/itm/181283274562
DISCLAIMER: Not associated with the seller On Wed, Aug 5, 2015 at 4:15 AM, Bob Camp <[email protected]> wrote: > Hi > > The front end would be “dealers choice”. He who does the > project gets to decide what gets used. > > If you look over some other designs, you can indeed get > a device going with a 12 bit converter. The qualifier is that > the signal to noise needs to be pretty good. With fades > and switcher interference, you probably would notice its > limitations. > > The “other end” of the design spectrum would be with a part > designed as a high range font end chip. You can get to a lot > of bits at low frequency. Even the prices aren’t all that crazy. > > Is there one and only one approach here? Not in any way. There > are several thousand possible ways to do it. AGC or no AGC would > be a pretty major decision. Next decision would be things like clocks. > 15 MHz from a ($25) KS box that also puts out 10 MHz looks like a > pretty good choice at the moment. > > Past that it’s decimators / filters and the usual DSP stuff (or any of > a dozen alternatives). Given the high noise environment I’d lean towards > a DSP approach. > > Most of the choices run into the easy / quick / cheap tradeoff triangle. > I’m > sure that the debating process can find a solution that should “cost 10 > cents”. I’m > also sure that a basement lash up of available parts is quick, but hard to > reproduce. > I’m not terribly surprised at the lack of 10 cent solutions. I’m a bit > surprised > that there are no unique lash up designs. The debate process seems to > have made this a pretty un-attractive thing to do. > > Bob > > > On Aug 4, 2015, at 11:36 PM, Hal Murray <[email protected]> wrote: > > > > > > [email protected] said: > >> So far there have not been any home brew design radios show up that will > >> demodulate and lock to the new data format. There is plenty of info on > the > >> transmit format. The demodulation approach is not crazy hard. That said, > >> there’s still a lot of work to get a receiver running. > > > > Has anybody looked into a software approach? What sort of front end > would > > you want? > > > > > > -- > > These are my opinions. I hate spam. > > > > > > > > _______________________________________________ > > 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. > _______________________________________________ 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.
