On the picture bellow you see one of the smallest circuits in the Bitx20 V3 build.It`s the PA driver,the last step in the transmision line before the transmit signal enters the PA Amplifier.As you can see,I used another binocullar core,only this time with bifilair windings.I also discovered that the circuit diagram I found on the internet is somewhere different as the one`s I`ve allready build.On my other Bitx20 V3 there are only 8 windings through the cores.So far in this build I took 13 turns through the cores.Hmmmm!Maybe I have to correct this.The transistor is the 2N3904.Next and final step on the exciter is the VFO.
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