[time-nuts] any WWV audio recordings available?
slburris at gmail.com
Wed Feb 10 14:24:20 UTC 2010
Thanks for all the pointers.
I've come to a new intense dislike of electrolytic capacitors while debugging my
clock. One was really bad in the radio receiver board's AGC circuit, causing oscillation,
so I ended up recaping every electrolytic I could find. Probably not too surprising in
a 20+ year old clock.
The clock stopped syncing about 5 months ago. I did the cap replacement, then
realigned the receiver and tone decoders, but still no go. That's why I was trying to
cut my problem space in half by injecting a known good audio. I thought it
would be a no brainer for the clock to sync to injected audio, but that hasn't gone
as well as expected.
The clock isn't a source of time or frequency for me anymore, but I want to keep it
alive for the nostalgia factor.
On Feb 9, 2010, at 11:26 PM, Dean Weiten wrote:
> Hi there,
> Some time ago, I "hot rodded" the "tg" program that comes with the open
> source "ntp" package and cleaned it up, making options for different
> output formats, including IEEE 1344 extensions on the IRIG, and cleaned
> up the WWV output for DST shifts, quality coding, etc.
> When you posted your question, I did a quick look, hacked in libsndfile
> calls, and made it so it can generate clean IRIG-B or WWV audio WAV
> files of arbitrary duration, starting at arbitrary times. The
> generation actually runs much faster than real time, resulting in huge
> files for long time frames, stored in seconds.
> As an example, please find at
> http://www.weiten.com/time_nuts/2010-02-10_07h09Z.zip , a 221k ZIP
> archive that expands out to a 92M WAV file of simulated WWV audio from
> 2010-02-10 07h10Z to about 17h29Z.
> Is this helpful?
> Dean Weiten
> Phone: (204)-888-1334 (home)
> (204)-771-4925 (cell)
> E-mail: dmw at weiten.com (home)
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