Changes

[[File:TH-D74A.jpg|none|thumb|Fully Assembled Kenwood TH-D74A|alt=]]Full teardown pictures and videos of the TH-D74 along with notes on reverse engineering and obtaining a copy of the firmware. 

There is a serial port<ref>Test citation to see if References header is automatically added.</ref> labeled SCTX and SCRX (See Processor Board Bottom picture above), both of these lines appear to be transmit only from the top CPU board down to the bottom transceiver board. As the radio is tuned from one frequency to another the SCRX line has a lot of activity, when the transmitter is keyed up the SCTX line has activity. Below is a sample of what is seen on the SCRX line. [[Travis Goodspeed]] commented to me on Twitter that these commands seemed similar to the Rig Control commands sent from PC's to radio's to control them.