Re: BITX40 Pop Fix

Evan Hand

Not sure that I understand what you are asking for the BITX40, as there is not a Q74 in that rig.  If your question is for the uBITX (any version), the T/R signal that controls the gate of Q74 is a 5 volt signal direct from the Raduino board.  It is labeled T/R, not TX/RX.  It is also connected to Q15 that then drives the K1 relay.


Join to automatically receive all group messages.