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From: Gerald Swann
To: time-nuts@lists.febo.com
Subject: Re: [time-nuts] Grandfather clock sync'd to 1PPS (from
time-nuts Digest, Vol 200, Issue 4)
Eamonn and all,
You mentioned you hope to get your grandfather
During WWII the Germans had crystals that glowed at resonance. Some place I
have about a dozen of them on different frequencies. These were mainly used
for calibration purposes, much like in our ARC-5 transmitters that utilized
a crystal and a magic eye tube. About 55 years ago I had an old German
Re: light producing crystals-
If you view https://en.wikipedia.org/wiki/Sonoluminescence
you'll learn that this is not the explanation for the blue glow
seen in the crystals. Sonoluminescence involves collapsing
tiny bubbles in liquids driven by high power acoustic fields.
I think it's safe to
Haha - interesting pictures. It looks like they really do glow, but I
doubt it's from anything the crystal element is doing - it and the mount
structure may just serve as the electrodes for a gas discharge lamp. If
the envelope is filled with some relatively "inert" gas or mixture,
instead of v
Hi
You need to extract Cm, Lm and Rm ( motional resistance, capacitance,
inductance)
for the mode you are looking at. You also need C0. Once you have those you can
come up with Q. Because of the interaction between C0 and the other parameters,
you need to extract them all. ( yes, you could extr
Hi All,
Just to be clear, I am not the person who made the crystals glow blue. I
just noticed some pictures of that happening on the auction site:
https://www.ebay.com/itm/8x-Quartz-Resonator-1000-kHz-Crystal-oscillator-gold-Sonoluminescence-effect-NOS/113862454353
https://www.ebay.com/itm/1x
I also disciplined a friends grandfather clock. I used a small servo to
nudge/impulse the pendulum. It used 24 impulses/minute. Worked rather well for
a crude hack. No mods were done to the clock case/mechanics.
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Eamonn and all,
You mentioned you hope to get your grandfather clock time synchronized
to a 1PPS signal. That would be a very satisfying project, I can assure
you. I did that with my own grandfather clock. My father built the clock
quite a number of years ago from a kit, and used walnut wood
