For sale is reprint of Hickok 535 Dynamic Mutual Conductance Tube Tester manual. Manual is 20 pages long and includes 11×17 foldout of Circuit Diagram.
Manual comes with 4 pages of Ballast Tube Data, Part list and Operating Instructions. Manual is dated 1948. Also included are 3 Bulletins (T-101, T-103, T-127) with additional 6 pages of tube data.