[time-nuts] One Kg Quartz Resonator

Bob Camp lists at rtty.us
Wed Jan 23 21:24:16 EST 2013


Hi

Not having a bar sitting here to play with, it's hard to tell how the bar is mounted. If it's mounted by the points on the disks, then they must be non-moving nodal points. If that's what they are, I'm a bit surprised that the bar has nodes at the ends.

Bob

On Jan 23, 2013, at 6:57 PM, Fabio Eboli <fabioeb at quipo.it> wrote:

> Il 2013-01-23 13:39 Bob Camp ha scritto:
> 
>> the mode that the bar is resonating in, it's a bit hard to guess where
>> the nodes will be. Just looking at the bar, you wouldn't *guess* that
>> the end points would be nodes...
>> 
>> Bob
> 
> Sorry Bob I didnt understand last part.
> You say that the end faces are nodes that move very little?
> Or that it's hard to tell the way they move?
> I asked that because reading the patent, I understand
> that the plates are trimmed to stay near the rod and
> not touching it, to give costant air reflection behaviour.
> And talks about supersonic movement of the air, so I
> was wondering why that was only a problem on end faces
> and not on other "long" faces of the rod.
> 
> Thanks,
> Fabio.
> 
> 
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