[time-nuts] Mechanical 1PPS Oscillator Disciplining
info at blackmountainforge.com
Sat Jan 10 19:06:16 EST 2015
Science Madness has a PDF of the book - Projects for the Amateur Scientist
by SciAm columnist C.L. Stong.
The pendulum is on page 290
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf
> Of Hal Murray
> Sent: Saturday, January 10, 2015 15:09
> To: Discussion of precise time and frequency measurement
> Cc: hmurray at megapathdsl.net
> Subject: Re: [time-nuts] Mechanical 1PPS Oscillator Disciplining
> holrum at hotmail.com said:
> > Basically the solenoid nudged the pendulum
> There was an article in Scientific American many years ago.
> They used a
> magnet mounted on the end of a stick attached to the pendulum
> arm. The arc
> of the magnet swung through a hole in the middle of a
> solenoid coil. A pulse
> on the coil at the right time provided the nudge with no
> physical contact.
> These are my opinions. I hate spam.
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