Re: Redy for smoke test but Bitx 42

Dexter N Muir

Wrong, Curt.  Presence of that Tuning connector defines your board as BITX40 - and yes, Shep, that extra 3-pin connector on board was for the potentiometer to control the voltage of a varicap diode in the early analog oscillator. If you have the Raduino, that is redundant: the Raduino replaces that oscillator. The inductor for that oscillator was a toroid: there should be a blank component outline in that area for that(L4), and C91. Refer to the circuit diagram at

That 4.7k resistor is only needed for proper operation of the uBITX.

Join to automatically receive all group messages.