Vintage Hickok OS-10 Tube Radio Oscillator. This oscillator made by Hickok is a rare piece of test equipment. There 4 tubes in the system: 6J7, 1C6, 1D6, and 1V. All of them test strong on our TV-7 tube tester. I replaced the power cord because the old power cord was cracked and frayed. It powers up and produced output on the o-scope on all bands except the highest “G” band. The glass cover on the right dial indicator is missing/ broken as shown in the photos.
