This is very interesting and I wonder if the capabilities of this
system being applied to any clock pendulum. If this sort of control
any pendulum, then I wonder if it's possible to sync it to some
standard.
Steve
On 08/08/2010, Don Mimlitch donm...@yahoo.com wrote:
Jim Said:
It also has a coil
This is very interesting and I wonder if the capabilities of this
system being applied to any clock pendulum. If this sort of control
any pendulum, then I wonder if it's possible to sync it to some
standard.
Steve
On 08/08/2010, Don Mimlitch donm...@yahoo.com wrote:
Jim Said:
It also has a coil
Sorry for double post, modem dropped during sending and a refresh on
the browser when it was up resent the message.
Steve
On 08/08/2010, Steve Rooke sar10...@gmail.com wrote:
This is very interesting and I wonder if the capabilities of this
system being applied to any clock pendulum. If this
Not many clocks are set up with the gear to modulate the rate,
but they are all still sensitive to injection locking.
A tiny rare earth magnet on the pendulum (say 1/2 way down the
pendulum rod)
and a coil fed with a stretched (say 250ms long) PPS or for a seconds
pendulum
PP2S pulse will
I was rather more thinking of the setup that Don was suggesting as not
many domestic clocks have a seconds pendulum and it would otherwise
take dividing down a referenced oscillator to the correct frequency.
Cheers,
Steve
On 08/08/2010, Neville Michie namic...@gmail.com wrote:
Not many clocks
Check out Bryan Mumfords page.
http://www.bmumford.com/clocks/em2/index.html
Le 08/08/2010 11:14, Steve Rooke a écrit :
I was rather more thinking of the setup that Don was suggesting as not
many domestic clocks have a seconds pendulum and it would otherwise
take dividing down a referenced
On 08/08/2010, mike cook mike.c...@orange.fr wrote:
Check out Bryan Mumfords page.
http://www.bmumford.com/clocks/em2/index.html
I did not want to kick the pendulum with a pulse each swing as the
drive would be part and parcel of the existing clock mechanism. What I
was interested in was Don
Hi all,
I think at this point I need to explain the electromagnet positioning.
The permanent magnet is on the rod about 25cm down (out of 100cm). The
electromagnet is on the left side and so gets close to the permanent
magnet every two seconds.
Injection locking would be a simple solution and
the location of a
weight along the pendulum.
-RL
---
--
From: Steve Rooke sar10...@gmail.com
Sent: Sunday, August 08, 2010 7:30 AM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Regulating a pendulum
That's why I suggested killing the BW of the opamps in the partial H
bridge configuration previously suggested. Transient response is almost
unneeded.
-John
==
On 08/08/2010, mike cook mike.c...@orange.fr wrote:
Check out Bryan Mumfords page.
Well last night I did a quick and dirty.
I got my (GPS locked) 3325B to generate square waves (0-5V) at 1 Hz. 500ms
on. 500ms off. I ran this through a relay that delivered 10mA at 25V to the
coil.
By adjusting the phase of the 3325B I got the ON to occur as the magnets
approached. But I had no
Nice!
Don
- Original Message -
From: Jim Palfreyman jim77...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Sunday, August 08, 2010 6:12 PM
Subject: Re: [time-nuts] Regulating a pendulum clock (Jim Palfreyman)
Well last night I did
Jim Said:
It also has a coil mounted near the pendulum and a fixed magnet on the
pendulum bar and this coil connects to a box down below with a meter
and a knob. They are labeled in sec/day. The electronics in the box
are not clear (being quite old) but by measuring the current in the
coil it
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