Independent receive for the DB6NT MKU23G2

摘要

I have been using a DB6NT MKU 23G2, for many years now. Having acquired a GR1236 noise meter and an SDRIQ receiver I needed to investigate extracting a 144MHz receive only signal from the transverter. This is needed to drive a 144/28MHz GPS locked converter to use the above units without needing a separate 2304/144MHz receive converter. Initial examination revealed that a signal could be tapped off from the slider of the RX gain pot. A small terminal pin was inserted alongside the pot and a lnf chip capacitor connected to it on the track side of the board. A short piece of RG174 on the ground plane side of the board was connected to an SMC connector on the side of the box. The opportunity was also taken to fit an SMA connector on the sidewall near the crystal to allow for future external 120MHz oscillator input.