Category: Volume 4

On the Cover The inner structure of the ill-fated 6AE4 magnetron In this issue

On the Cover The Eimac XM15 developmental power triode, ca 1947 In this issue

On the Cover The Amperex 211G power Triode In this issue

On the Cover The Bell Labs type A transister, 1949 In this issue

On the Cover One variation of the Schickerling T.V.T. tube In this issue

On the Cover The “Liberty Valve” as once sold by the Radio Apparatus Co. of Pottstown, Pa In this issue