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.

Power type and voltage. Alternating Current supply (AC) / 100-120 Volt. No sound reproduction output. Hickok Electrical Instrument. Tablemodel, low profile (big size). 12 x 9.25 x 6 inch / 305 x 235 x 152 mm. Price in first year of sale. United States of America (USA). Hickok Electrical Instrument Co. Service- or Lab Equipment. All tubes original and working. Missing probe so not tested.