Crystal checker

Posted on Sep 3, 2012

Use this circuit for checking fundamental oscillates, Q2 conducts and the LED lights. A3 HF crystals on a `Go-No-Go` basis. An untuned or 6V, 40mA bulb could be substituted for the Colpitts oscillator drives a voltage multiplier LED

Crystal checker
Click here to download the full size of the above Circuit.

rectifier and a current amplifier. If the crystal.

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