This is my grandpa. He worked as an engineer for the NBC's Blue radio network in the 40's. The red and blue networks of nbc were split up by the courts and the Blue became ABC. When TV came around the heads of the network asked him and his coworkers to build everything they needed to start broadcasting TV. A tall order. He stayed with ABC until he retired just after the '84 olympics. He's been helping me out a lot getting all the equipment wired up for power, as well as helping me solder all the connections in the audio patch bay. Many thanks Grandpa Giff!