>
> G3PLX did something similar, synchronising his GF clock to GPS. But
> wanting to make no modifications to the pendulum, IIRC he placed a
> solenoid near the pendulum and used eddy current loss to slow it down.
>
> Andy
> www.g4jnt.com
>
>
>
>
>
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> One method of controlling a pendulum but allowing it to swing naturally
Morris,
Here are some examples from the web ...
"Build The Mystery Solar Powered Pendulum", by David Williams
http://nutsvolts.texterity.com/nutsvolts/201208/?folio=32#pg32
"Perpetual Swinging Pendulum", by Bill Bowden
Hello Paul,
You will still need to power the clock by winding it up when required.
The pendulum does not drive the clock, it regulates how the power is
allowed to escape from the driving force through a mechanism called the
escapement.
As far as regulation goes the traditional was is to
> In tboltmon, the signal "strength" indications are displayed in units
> called 'AMU' for which I've been unable to find a definition.
Amplitude Measurement Units? There was a discussion about this some
years ago. The TBolt (and other Trimble receivers) give a user the
choice of reported GPS
Sent from my iPhone
> On 10 Mar 2021, at 15:54, Dana
>
> I have convinced myself that the PPS output from my Tbolt is derived from
> the produced
> 10 MHz output, because if I trigger an o'scope from the PPS output, the 10
> MHz sinewave
> shows very little time jitter, perhaps 1 or 2 nsec.
This has been a most interesting thread.
One method of controlling a pendulum but allowing it to swing naturally that
I am familiar with is to put a small unobtrusive magnet on the bottom of the
bob and an inductor on the base of the clock at the centre of the swing.
Depending on how you arrange
