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local oscillator

  1. PE9ZZ

    Front End LO/RF Tracking and Alignment

    Some time ago I made a spreadsheet in order to optimize the tracking of the local oscillator and the RF circuits in an FM front end. The most interesting finding is that this alignment should not take place at the band ends (88/108 MHz) but rather at 90 and 105 MHz. In case of the well-known...
    • PE9ZZ
    • Thread
    • fm front end local oscillator tracking tuning alignment
    • Replies: 20
    • Forum: Tuners
  2. S

    Sansui G-8700DB Digital Display is off by 0.2MHz - Local oscillator vari-cap replaced.

    The tuner in this receiver had issues but now functions. The first issue I had was that the local oscillator variable cap. did nothing and the dial was way out of whack. The digital display was way off too. After replacing the variable cap. and tuning it to proper DIAL setting, it worked OK...
    • sbbrown
    • Thread
    • digital display local oscillator
    • Replies: 2
    • Forum: Tuners
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