[time-nuts] WWVB and Chronverter update

Dana Whitlow k8yumdoober at gmail.com
Fri Aug 24 09:41:11 EDT 2018


I like Paul's idea, although there may be a risk of the LED's drive signal
not being accurately timed.  Driving that LED accurately may have had
a low priority in the programmer's mind.

This should be independently checked for critical applications.

Dana


On Fri, Aug 24, 2018 at 8:23 AM paul swed <paulswedb at gmail.com> wrote:

> Thank you for the responses.
> I have not reached out to him yet. Want to see if there are other issues
> and I can easily add an external 60 KHz source and modulator right now to
> verify the other functionality.
> There is no schematic nor source code its a 8 pin uproc chip and as such
> has almost no IO. I can easily see a very simple fix but needs a change to
> the code behavior. (The chip it self can not do the modulation function.
> Thats why its OOK).
> But if the carrier were left on there is a LED that blinks to the time code
> sequence and that can drive a 1 transistor or diode modulator.
> Regards
> Paul
> WB8TSL
>
> On Fri, Aug 24, 2018 at 3:14 AM, Dana Whitlow <k8yumdoober at gmail.com>
> wrote:
>
> > Is there a schematic published for the Chronverter?  I agree with Didier
> > that the
> > OOK issue *ought *to be pretty easy to fix, and I'd like to look into
> that
> > myself.
> >
> > Dana
> >
> >
> > On Thu, Aug 23, 2018 at 9:00 PM Didier Juges <shalimr9 at gmail.com> wrote:
> >
> > > Have you tried to contact the manufacturer? It sounds like something
> that
> > > should be easy to fix and that he would want to fix.
> > >
> > > Didier KO4BB
> > >
> > > On Thu, Aug 23, 2018, 8:55 PM paul swed <paulswedb at gmail.com> wrote:
> > >
> > > > Hello to the group.
> > > > Had sometime to hook up the chronverter wwvb simulator.
> > > > Numbers of details.
> > > > The software and operation are clear.
> > > > Everything is easy to setup.
> > > > Bad news.
> > > > Though the system when set to wwvb puts out a signal on 60Khz its on
> > off
> > > > keying.
> > > > WWVBs signal is reduced carrier by some 14db.
> > > > As such any of the WWVB clocks of quality/phase tracking do not lock
> > and
> > > do
> > > > not decode.
> > > > I have not tried the cheap clocks yet that I suspect will work.
> > > > The actual carrier out is a healthy 0 dbm.
> > > >
> > > > Some issues with commands and the system seeming to lock up requiring
> > > power
> > > > cycles.
> > > >
> > > > With respect to the carrier. The chronverter is elegant in the fact
> > that
> > > it
> > > > can generate the 60 KHz frequency and other LF signals. But I will
> need
> > > to
> > > > add an external 6 MHz oscillator divider and modulator if I want to
> use
> > > it
> > > > with the good receivers.
> > > > Adds power and complexity.
> > > > Regards
> > > > Paul
> > > > WB8TSL
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