[AMRadio] A lot of WWV and NIST discussion

[K5MYJ]

Try this:
http://www.techlib.com/

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "Robert Bethman" <oldrotorheadsarge at outlook.com>
To: <amradio at mailman.qth.net>
Sent: Monday, October 01, 2018 10:30 AM
Subject: [AMRadio] A lot of WWV and NIST discussion


> I'll try this again.
>
> Go to <www.techlib.com<http://www.techlib.com>>
>
> On that opening page, there is the GPSDO right there.
>
> Click on that item!
>
> It WILL take you to the page with it, a complete description, and the 
> entire circuit.
>
> [Direct link: 
> <http://www.techlib.com/electronics/GPSstandard.htm><http://www.techlib.com/electronics/GPSstandard.htm>]
>
> Mr. Wenzel designed this for me.  Any number of 10MHZ ovenized VCXO SC Cut 
> oscillators that are tune-able by external correction can be obtained and 
> used.
>
> For heaven's sake, DO NOT procure some Chinese system!  They are NOT 
> reliable!
>
> The expense isn't all that high.
>
> The ICs are readily available.
>
> Mr. Wenzel used an external 1PPS signal source for this project.
>
> I obtained a Trimble Resolution T board that is NOT in production any 
> longer.
>
> There are quite a number of GPS receiver boards available that give the 
> 1PPS signal.
>
> The meter used is a +/- 3mA meter movement.  The movement is converted to 
> a volt meter by use of a 25K trimmer.  Value NOT given in the schematic!
>
> This provides a 10MHZ sine wave with the accuracy described by Mr. Wenzel.
>
> I have it all here, BUT - I have NOT gotten it all assembled.  I managed 
> to do significant nerve damage to both forearms last year.
>
> This will require surgical intervention that is being scheduled this year.
>
> My hands are numb and I have significant difficulty grasping even a 
> soldering pencil or parts.
>
> This provides an extremely accurate 10MHZ sine wave output!
>
> Propagation just does not provide an accurate and reliable signal from 
> WWV.
>
> There are too many instances when WWV cannot be picked up at all.
>
> Regards,
> Bob Bethman, N0DGN
>
>
>
> ______________________________________________________________
> Our Main Website: http://www.amfone.net
> AMRadio mailing list
> Archives: http://mailman.qth.net/pipermail/amradio/
> List Rules (must read!): http://w5ami.net/amradiofaq.html
> List Home: http://mailman.qth.net/mailman/listinfo/amradio
> Post: AMRadio at mailman.qth.net
> To unsubscribe, send an email to amradio-request at mailman.qth.net with
> the word unsubscribe in the message body.
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to macklinbob at gmail.com