I built/tried to build the TX interface for FMS from http://net-express.com/nexus/fmsinterface.html I plugged it into the computer and nada. After pulling it apart I found that there was no current able to pass through one side of the transistor and a lot of resistance on the other side. Did the transistor melt when I soldered it or it the transistor up side down? The side that won't pass current is connected to pin 10 on the parallel port connector.