UNIVERSAL TEST OSCILLATOR

  
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Crystal is in feedback path of Pierce oscillator, between base and collector of al, with 2.5-mH RF choke in place of tuned collector circuit. Oscillator works from 400 kHz to 20 MHz, depending on crystal. Designed for fundamental crystals; third overtone types will oscillate but at fun-damental. Value of 01 is for 1 MHz and higher; increase to 330 pF for l..
UNIVERSAL TEST OSCILLATOR - schematic




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