CRYSTAL TESTER


Posted on Feb 5, 2014

JFET Pierce oscillator will test any crystal from 50 kHz through 25-MHz upper frequency limit of fundamental-mode crystals without tuning, and drive counter for measuring crystal frequency, Will test overtone VHF crystals on their fundamental frequency. T1 is small output transformer from tube-type radio, having about 33: 1 turns ratio, or 6. 3-V f


CRYSTAL TESTER
Click here to download the full size of the above Circuit.

ilament transformer if 1N645 rectifiers are used in place of 50- F filter capacitors to give fullwave voltage doubler providing required 9 V. RFC1 is 2. 5 mH, and RFC2 is 150-mH miniature toroid. -F. Brown, A Universal Crystal Oscillator, QST, Feb. 1978, p 15-16.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Voltmeter circuit
    Wireless Ir Headphone Transmitter Circuit
    Dual Tone Sounder Circuit
    BC337 Light Relay Switch By BC547 &
    3volt FM TRANSMITTER PROJECT
    Working Principle Television (TV)
    Car Battery Saver Circuit
    simple led automatic daynight lamp
    simple automatic street light system
    propeller clock amazing illusion
    Visual System Simulator circuit
    Energy-saving lamp electronic ballast circuit
    555 Simple circuit diagram of the timing of time



    Top