Hickok 539B 539C Tube Test Data Book $9.99 Category: Hickok Description Description For sale is reprint of Hickok 539B and 539C Tube Test Data book. Tube Data Book is 84 pages long. General test data section is 23 pages long, Obsolete tube types is 26 pages long, Foreign tube types section is 27 pages. Related products Hickok Model 691 Heterodyned Marker Adder Operating Manual $9.99 Read more Hickok KS-5727 Bell System Practices Tube Tester Manual $8.99 Read more Hickok 532 Dynamic Mutual Conductance Tube Tester Manual $9.99 Read more Hickok 191X Universal Crystal Controlled Microvolt Signal Generator Manual $9.99 Read more