Connections between the VFO and the Bitx are Clock 0, ground, the to the 2 pin connector next to the vfo coil approximately in the middle of the board. You have to remove ?the VFO coil as per instructions. I also put a 40 meter low pass filter in series with the VFO lines and the BitX connection. I'm not sure it made any difference, however it should turn the VFO square wave into a sine wave, and it's said to cut down the noise generated by the VFO.?
