1927 Article Radio Tube Pressure Scientific Diagrams E. V. Simdt Electric SI1 SA1A Keywords specific to this image:

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typical garment

1927 Article Radio Tube Pressure Scientific Diagrams E. V. Simdt Electric SI1 SA1A Keywords specific to this image:This is an original 1927 one page article (one single sided page) by E. V. Smidt on the pressure contained inside a typical radio tube, as well as information on a Simple Electric Motor by Earl Aldridge and a Touring Switch for one's car by Guy E. Mcallan. CONDITION This 84+ year old Item is rated Near Mint Very Fine. Light aging throughout. Light creasing. No natural defects. Some light surface rub. No tears. No water damage. Please note that there