Peter Putnam wrote:
You have all been a bit stingy with your gravitational inputs on the hp
18011 oscillator... one G this way... two Gs the other way...
Here you can see the result of some serious Gs, all applied at the same
time...
e*.* auction item:160360186935
Add only
Nah...
That'll polish out OK!...
Dave G0WBX.
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Message: 4
Date: Fri, 04 Sep 2009 02:13:27 -0600
From: Ed Palmer ed_pal...@sasktel.net
Subject: Re: [time-nuts] OCXO sensitive to gravitational effects
To: Discussion of precise time and frequency measurement
More realistically, it's not that hard to simulate 2 G
9.8 = V^2/r or (2*pi)^2*r*rotation rate^2. Say you have an r of one meter
(should fit conveniently in your garage)...
10/12 /1 = rotation rate^2... About 1 rev/second - 60 rpm. 12 m/s tangential
velocity.
That would actually get you
You should have seen the Tek CG5011 cal generator that I got from him (bought
it for the optical encoder to repair another one). Half the ceramic ECL chips
were decapitated... it's only a flesh wound... cleanup on 6, bring a scooper.
You have all been a bit stingy with your gravitational inputs on the hp
18011 oscillator... one G this way... two Gs the other way...
Here you can see the result of some serious Gs, all applied at the same
time...
e*.* auction item:160360186935
Add only $56.55 to your bid to
- Original Message -
From: Peter Putnam pico.2...@sbcglobal.net
To: Time Nuts time-nuts@febo.com
Sent: Friday, September 04, 2009 1:30 AM
Subject: [time-nuts] OCXO sensitive to gravitational effects
You have all been a bit stingy with your gravitational inputs on the hp
18011
Interesting. It makes sense that it is the holder and not the crystal itself
that is sensitive. I only implied that the oscillator as a whole displayed
this sensitivity. While I didn't try to actually measure the change, I would
estimate it at almost 1e-8. I will try to use a strong magnet nearby
Or, as it was explained to me, the magnetic field causes the holder to move,
which puts a mechanical stress on the crystal, which changes the frequency.
And an AC field can induce a voltage in a loop (i.e. The wires going to the
crystal), which then moves the crystal, etc.
Limitless things to
Lux, Jim (337C) wrote:
Or, as it was explained to me, the magnetic field causes the holder to move,
which puts a mechanical stress on the crystal, which changes the frequency.
Just how much depends on the details not only on the holder parts but
also how the crystal is mounted. The extreme
