[time-nuts] WWVB remodulator for the spectracom 8170 the schematic is to large

paul swed paulswedb at gmail.com
Mon Jun 17 00:22:36 UTC 2013


Yes it is I would have sent the pdf but thats larger than 125 KB limit for
time nuts.
Regards
Paul.


On Sun, Jun 16, 2013 at 7:35 PM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> Next in on the same line … MSA or MAS?
>
> I assume it's:
>
> http://www.mas-oy.com/products/radio-controlled-clock-rcc/mas6180/
>
> Which would make it a MAS 6180 or it's dual band relative the MAS6181
>
> Bob
>
>
> On Jun 16, 2013, at 6:39 PM, paul swed <paulswedb at gmail.com> wrote:
>
> > Good catch Bob 6180.
> > Thanks
> > Paul
> >
> >
> > On Sun, Jun 16, 2013 at 6:19 PM, Bob Camp <lists at rtty.us> wrote:
> >
> >> Hi
> >>
> >> MSA 6180 or MSA 8160 or ….
> >>
> >> Bob
> >>
> >> On Jun 16, 2013, at 5:43 PM, paul swed <paulswedb at gmail.com> 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
> >>> _______________________________________________
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> >>
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