[Test-Equipment] Xtal Tester

[Dino Papas]

Joe - if you want a more capable tester you might consider W1FB's circuit in the January 1990 issue of QST and updated in the W1FB Design Notebook.  The PCB is available from FAR Circuits; makes a nice unit but you will need a signal generator and a counter in order to determine the xtal parameters (series resonant frequency, 3-dB response points and series resistance).

73 - Dino KL0S
 
On Mar182013, at 1325 PM, Precision Carburetor DP wrote:

> Hi Joe.
> 
> In the July 1964 issue of CQ magazine page 30  there is an construction
> article for a crystal tester.  Below is a quote from a blurb on the title
> page. 
> 
> 
> 
> "The simple device described below was built to determine the condition of
> the many crystals around the shack."
> 
> 
> 
> W6BLZ EH Marriner was the author.
> 
> The simple circuit uses a 6AH6 pentode with a ma meter in the control grid
> circuit.  If there is some interest I will scan the article for anyone who
> wants it.
> 
> Jerry
> 
> W2JI