[Test-Equipment] crystal checker

Chris Trask christrask at earthlink.net
Sun Feb 24 12:04:26 EST 2008


     Yes, that's what I meant to say.  Thank you for catching that.

-----Original Message-----
>From: Bob Roehrig <broehrig at aurora.edu>
>Sent: Feb 24, 2008 10:01 AM
>To: Chris Trask <christrask at earthlink.net>, Discussion of Electronic Test Equipment <test-equipment at mailman.qth.net>
>Subject: Re: [Test-Equipment] crystal checker
>
>On Sun, 24 Feb 2008, Chris Trask wrote:
>
>> The trick was that he was loading up the holder capacitance (Cs) with a 
>> pair of 470pF capacitors in the feedback network, forcing the 
>> parallel-resonant frequency to be considerably closer to the 
>> parallel-resonant frequency so that they were approximately equal.
>
>I think you meant closer to the series resonant frequency.
>
>
>                               Bob Roehrig
>                     Aurora University    Telecom dept.
>                            broehrig at aurora.edu
>                          K9EUI  W9ZGP  WD2XSH/19
>                     630-844-4898      fax 630-844-4222
>                     "Nostalgia is a thing of the past"


Chris

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