[time-nuts] WWVB D-PSK-R updated 12 Mhz Costas and Div chain

Stanley timenuts at n4iqt.com
Tue May 21 08:25:41 EDT 2013

Expresspcb  download from www.expresspcb.com/ExpressPCBHtm/Download.htm 
free, may need to zoom in to read part numbers.

----- Original Message ----- 
From: "J. L. Trantham" <jltran at att.net>
To: "'Discussion of precise time and frequency measurement'" 
<time-nuts at febo.com>
Sent: Tuesday, May 21, 2013 5:39 AM
Subject: Re: [time-nuts] WWVB D-PSK-R updated 12 Mhz Costas and Div chain

> Can you tell me what program will open the .SCH files?
> Thanks.
> Joe
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of paul swed
> Sent: Monday, May 20, 2013 5:24 PM
> To: paul swed; Time-nuts
> Subject: [time-nuts] WWVB D-PSK-R updated 12 Mhz Costas and Div chain
> Hello to the group.
> I have updated the WWVB costas loop. Thanks to some guidance from fellow
> time-nuts. The key items; A error in the 74hc86 gate pins. A new 12 Mhz 10
> ppm Oscillator that uses available known parts. These changes have been
> tested and behave well. I would also add that the 150 uf filter caps needs
> to be very low leakage. Also the TRF receiver is included no changes to it
> just thought I would keep the set together. Regards Paul WB8TSL
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