Hickok Model 540 Dynamic Mutual Conductance Tube Tester Manual $8.99 Category: Hickok Description Description For sale is reprint of Hickok 540 Tube Tester manual. Manual 7 pages long and includes Circuit Diagram. Manual comes with 4 pages of Ballast Tube Data, Part list and Operating Instructions. Manual is dated 1944. Related products Hickok 690 VHF-UHF Crystal Controlled Marker Calibrator Operating Manual $9.99 Read more Hickok Model 760 Video Scanner Operating Manual $9.99 Read more Hickok 890 In-Circuit Transistor Tester Manual $10.99 Read more Hickok KS-15559-L1 KS-15560-L1 Tube Tester Manual $9.99 Read more