Today was a setback, I took the handheld radio and gave it to Anita to do some radio checks and my RFI issue is back, now with the other radio, it drops the AP74 on the DSAB network. I soldered up a new DB25 connector so that the long run would feed the back then each item on the network would daisy chain. After doing this I tested things again and I still get the interference. I left this issue for now, too frustrating.
