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  1. W

    ANYTONE AT-5555N2 receive noise work-around

    Your aware that the settings on each radio are differant. Ones factory settings are diff from the next! You need a scope and signal gen to do any work to this unit
  2. W

    ANYTONE AT-5555N2 receive noise work-around

    DO NOT TRY AND CHANGE THE S METER SETTINGS WITHOUT A SIGNAL GENERATYOR. Without the generator as soon as you change the setting, you will NOT be able to change it back!!! if your Stock setting is 3800 and you key the mic and turn the dial WITHOUT a signal generator the reading will drop to like...
  3. W

    Anytone AT-5555n Service Manual.

    bf adjusts the frequency of the 10.24Mhz BFO fd0,4,5,9. What do these control? Hmmm. Bingo! These are for fine tuning! The radio performs fine tuning by adjusting the voltage across a set of varicaps, which affects capacitance and hence the frequency of the oscillator. These must be the limit...