[time-nuts] unidentified HF time pips

Scott Armstrong aa5am at vntx.net
Mon Feb 5 12:18:50 EST 2018

Hi Graham,

I am listening to one of those "time pips"  on 30m right now. (1714 utc
Frequency is 10.105.

The best I can tell with my calibrated ears and eyes, it appears to be in
sync with WWV. Signal strength is about a s6-7.

I also heard this on Saturday 02/03/2018  about the same frequency but
later in the day.

-Scott AA5AM
EM13sg - Blue Ridge TX

On Sun, Feb 4, 2018 at 4:31 PM, Graham <planophore at aei.ca> wrote:

> For some time there have been occasional reports of time pips on a number
> HF frequencies other than the well known CHU, WWV, (etc...) signals.
> For example 10140, 10145, 7040, 7065, 7105, 7120 kHz and likely others.
> The pips are approximately 15 to 16ms in duration and appear to locked to
> UTC but unlike WWV or CHU they are continuous minute by minute.
> Assuming the pips are synchronized to UTC, simply time of arrival with all
> of its issues on HF plus signal strength seems to indicated a source in
> North America.
> The frequencies and time of activity might indicate that it is some
> amateur radio operator playing around  but it might not be, the amateur
> 10MHz frequencies is shared with other users. The pips seem to be
> transmitted at a fairly high power level.
> I know there is ongoing testing of eLoran and other initiatives
> researching GPS backup systems.
> Anyone aware of any group doing any such testing which might be found on
> HF like this?
> cheers, Graham ve3gtc
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