These manuals are available for download and free of charge. Manual, Foreign Tube Chart and Obsolete Tube Chart for Hickok 800A Tube Tester. Instruction for operation of Model 800A. Read these instructions through before attempting to operate the Tester,. 1. This instrument is designed to operate on Download HICKOK 800A TUBE TESTER service manual & repair info for electronics experts. Hickok 800 Instruction Manual & Tube Charts. Protective plastic covers front and back. Printed on hi-gloss 28lb high quality acid free paper for a HICKOK TUBE TESTER 800A manual 22 pages gloss covers card stock covers - $15.00. FOR SALE! Diode testing. gloss cover protectors. Tube test data. HICKOK 800A TUBE Tester Ultimate Manual With Test Data & CA-4 CA-5 Data More - $19.95. FOR SALE! This is a very nice comb-bound reprint of the instructionUse this procedure to test and calibrate the Hickok Model 800/800A mutual conductance (AKA transconductance) tube testers. Except as noted, all of the