Rear view after assembly. The 7812 was added to make 12V available to the RCA jacks for accessory power. There's no point in additional wall warts to power the keyer, ETC, when I can simply get it from the rig's power supply. The phone patch jacks were previously modified by N2NC to break the receive line similar to Icom. This allows one to easily switch in a receive-only antenna. I brought the PTT line from the DIN plug to what once was the IF output jack.