Capacitor value question

Discussion in 'General Electronics Chat' started by Will777, Nov 9, 2010.

  1. Will777

    Thread Starter Member

    Sep 12, 2010
    48
    1
    I am building a circuit which requires a 2pf ceramic capacitor as well as a 7pf ceramic capacitor.

    I cannot find these values, the closest I can get is 1.8pf and 6.8pf.

    Will this small difference in value make a difference to the circuit? The circuit in question is a model rocket tracking transmitter.
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The wrong capacitor values might change the frequency of the transmitter if it doesn't use a quartz crystal. Then maybe the coil can be made with its turns a little closer together to get the correct frequency.
     
  3. Will777

    Thread Starter Member

    Sep 12, 2010
    48
    1
    Thank you for the info.

    This circuit does not use a quartz crystal.

    So if I understand it correctly it will still oscillate, but the frequency might just be off? That is great news, I have a RF sniffer/freq counter that I can use to check the output freq.
     
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