[time-nuts] wtd: WWVB info
tshoppa at gmail.com
Wed Aug 12 09:20:33 EDT 2015
Consumer WWVB products long ago moved from hobbyist-friendly DIP to gumdrop
IC's (black epoxy blobs covering chip bonded directly to PCB).
You can either buy a $10-$20 consumer WWVB clock and cut out the PCB
section around the gumdrop IC/filter crystal/ferrite stick, or buy a module
and ferrite stick.
The 60kHz (WWVB etc) filter crystals are listed (but not stocked) at
Digi-Key etc too (actually "60.002" and/or "60.005" khz parallel resonant
crystals are series resonant at 60kHz).
On Tuesday, August 4, 2015, Donald <donvukovic at gmail.com> wrote:
> I have been looking into WWVB receivers.
> I see that the sources I had purchased from a few years ago are no longer
> available(in the US).
> I see that the format of the WWVB signal has changed a little as well.
> Has NIST done something to not allow chip manufactures to make new
> chips/modules ?
> Is there any reason why we (in the US) are not allowed to buy these
> chips/modules any longer ?
> I did get a WWVB receiver out of the UK recently.
> Does anyone have a schematic for building a simple WWVB receiver ?
> Any information would be grateful.
> - Don
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