[Milsurplus] Crystal Holder Pressure

[Brian Harrison]

Hi Dave,

Have you seen this great youtube video?

https://www.youtube.com/watch?v=b--FKHCFjOM&t=29s <https://www.youtube.com/watch?v=b--FKHCFjOM&t=29s>

All the best to all in 2019,

brian
kn4r

> On Dec 31, 2018, at 12:35 PM, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> Building a mock-up of the Transmit crystal
> oscillator in the BC-669 transmitter.  Going to
> etch a bunch of large-blank crystals up to usable
> freqs.  The mock-up will have an open, horizontal
> crystal holder to accept the blanks to check them
> for freq and activity as the etching progresses.
> The blank goes into the open holder which connects
> one side of the blank and a weighted plate goes on
> the top of the crystal blank, to simulate putting
> it back in the holder.
> 
> Question:  Does anyone have an idea how much
> weight should press-down on the crystal blank to
> correctly simulate the holder?  Incorrect pressure
> on the blank can move the operation point several
> KC.  Could find this by "trial and error," but
> does anyone have any good information on this?
> 
> TNX ES 73 DE Dave AB5S

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