[time-nuts] WWVB Translation

Andy Backus ANDREWBACKUS at msn.com
Sat Oct 27 20:11:06 EDT 2018


I should have credited the loop idea as you did, Paul.  I don't know who it was, but thank you.


I would leave my translator on all the time if it weren't for my La Crosse -- whose reception would be ruined.


In my system, BTW, a resonant tank precedes a FET amplifier, which provides the antenna current.  I have found, as others have, that the frequency must be good to several Hertz.  So I use a crystal controlled CMOS gate oscillator to generate the RF.


Andy Backus

WA2TND


________________________________
From: time-nuts <time-nuts-bounces at lists.febo.com> on behalf of paul swed <paulswedb at gmail.com>
Sent: Saturday, October 27, 2018 4:01 PM
To: Time-nuts
Subject: Re: [time-nuts] WWVB Translation

Andy pretty much what I did also. A loop in the basement as suggested by a
time-nut.
Radiations quite low depending on the floor of the house and walls its
100uv to 30 uv.
Did resonate it with a cap that seemed to improve things. But no matter it
works for what I need and the clocks are happy.
I leave the simulator on all of the time now as no matter the time of the
day or battery change the clocks lock in the 3 or so minutes.
Since I don't own an official lacrosse no issue here though perhaps mid
January I will pick one up cheap... Chuckle.
If I do I guess l'll have to build a BPSK version. Oh hang on there thats
what the de-psk-r is. Just add 60 KHz. Actually depending on the clocks
cost as they get dropped maybe not a bad idea. Have fun with your system.
Regards
Paul
WB8TSL

On Sat, Oct 27, 2018 at 6:04 PM Andy Backus <ANDREWBACKUS at msn.com> wrote:

> For those still interested in GPS to WWVB simulation -- after trying a few
> antenna designs I found that a 50-foot loop of #26 enameled wire stapled to
> the rafters in the basement works quite well.  Putting 35 ma (rms) of 60
> kHz WWVB signal through it lights up the house quite nicely.  I don't know
> yet if it also lights up the neighbor's house.  I think I will investigate
> that question when (and if) they pull the plug in Colorado.  But I am
> prepared.
>
>
> Not so much for my La Crosse Technology WWVB BPSK clock.  I think it will
> get swamped out.  Can't have everything, I guess.
>
>
> Andy Backus
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