[time-nuts] Looking for QST Jan 1990 Article on Crystal S, Q & R testing By DeMaw

[Brooke Clarke]

Hi Mike:

I've received an email asking about where to purchase a crystal activity 
meter and although I have a hand held unit, see:
http://www.pacificsites.com/~brooke/Xam.html  don't want to part with it.
This is an older unit that uses PNP transistors.  I'm now thinking about 
how to build one using a PIC and to that end would like to see what's in 
the subject article.  So if you would email a copy to   
mailto:brooke at pacific.net?subject=Crystal_Test  that sure would help.

The final product should be a hand held battery powered easy to use device.

Have Fun,

Brooke Clarke

w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com



Mike Feher wrote:

>Brooke -
>
>In that case why do not just use a signal generator like an 8640B with the
>crystal in series with the hot lead and then the other side of the crystal
>terminated in 1K or so. Then you can put a scope across the 1K resistor and
>watch the scope as you tune across the suspected resonant frequency. I have
>done this a lot when I was not sure of the crystal frequency, or, if it was
>working or not. Real simple to do. If all else fails, I am sure I have the
>QST you mentioned, and could scan the relevant pages for you. I also have a
>military crystal activity meter that does do a full characterization, but,
>it is big and bulky, and, I hardly ever use it. 73 & Merry Christmas - Mike 
>
> 
> 
>Mike B. Feher, N4FS
>89 Arnold Blvd.
>Howell, NJ, 07731
>732-886-5960
> 
> 
>-----Original Message-----
>From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>Behalf Of Brooke Clarke
>Sent: Wednesday, December 20, 2006 5:15 PM
>To: Discussion of precise time and frequency measurement
>Subject: [time-nuts] Looking for QST Jan 1990 Article on Crystal S,Q & R
>testing By DeMaw
>
>Hi:
>
>I'm looking for  the subject article on crystal testing, or any other 
>articles on testing crystals.
>This is more related to knowing if a given crystal is alive than 
>characterizing it, i.e. a Crystal Activity Meter type thing.
>
>Have Fun,
>
>Brooke Clarke
>
>  
>