[ARC5] Crystal tester.

[Kenneth G. Gordon]

Wayne:

The military had a good crystal-test unit, but I cannot remember its nomenclature.

I have also collected several circuit which were designed to test crystals. Some are very 
simple, and some are far more complex but give you far better information.

I'll try to get those all together and send you PDFs of them.

Ken W7EKB

On 11 Jun 2016 at 17:05, Robert  Eleazer wrote:

> 
> Earlier this week I was trying to figure out if a couple of 1 MHZ
> crystalswere working - one 
> hadworked and then the oscillationstopped after a couple of minutes.With
> the other crystal 
> theoscillator was dead. 
> 
> I wonder if anyone has a design for a crystal tester? I was very
> impressed with the 2nd LO used 
> in the National NC-270 whenI converted a NC-155 to a crystal 2nd LO.I
> also was very 
> impressed with the 7404 TTL crystal controlled oscillator I built back
> in the mid-70's.Both worked 
> the first time.
> 
> I am always impressed with things that work the first time for me. In
> contrast, Edison said he did 
> not trust such devices.
> 
> I'd like to build a stand alone duplicate of the NC-270 2nd LO to use as
> a crystal tester and 
> general purpose oscillator. Has anyone done anything like that?
> 
> Thanks,
> 
> Wayne
> WB5WSV


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