Hear are some articles on the subject worth reading: Crystal Motional Parameters, A comparison of Measurement Approaches by Jack R. Smith, K8ZOA, June 11, 2006 http://www.cliftonlaboratories.com/Documents/Crystal%20Motional%20Parameters .pdf
Lesson Plan where they measured a crystal http://www.omicron-lab.com/customer_examples/pdf/Measuring_Equivalent_circui t_of_Quartz_crystal_II.pdf Simplified Tools and Methods for Measuring Crystals by Jim Kortge, K8IQY http://www.k8iqy.com/testequipment/pvxo/Atlanticon2002V1R5.pdf I have done measurements using the techniques documented above. I have used various pieces of equipment such as a spectrum analyzer with tracking generator, TAPR VNA, and the HP 3586C Selective Voltmeter with its internal tracking generator. I noticed the transformer jig as documented by K8IQY left something to be desired in my measurements. This was confirmed in the first document by K8ZOA where his table of test jigs and methods did not fair very well with the transformer jig. I ended up settling on a 50 to 12.5 ohm minimum loss pad on both sides of the crystal and the HP3586C for the measuring instrument. I have not read, at least recently to remember anything about it, the QST 1990 article. I probably have it on my QST CD collection. I will have to look it up. Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 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 -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
