Category: Magazines

On the Cover The Moorhead vertical-anode version or the British “R” valve of WW1 In this issue

On the Cover A British E1190 600- MHz power triode In this issue

On the Cover A Cooper Hewitt style Mecury-arc rectifier In this issue

On the Cover Sperry 8404 klystron (Navy CS-8404 In this issue

On The Cover RCA 5671 triode In this issue

On the Cover The Famed Umac 606 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 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