Hickok CA-5 Quick Start Manual

NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
NOTE 5:
NOTE 6:
NOTE 7:
NOTE 8:
CAUTION:
FOR THE
MODEL CA-5 ADAPTER
WHEN USED WITH
MODEL 539B
ROLL CHART TUBE TESTER
The letter preceding the numerical reading in the MIN MUT
COND (minimum mutual conductance) column indicates the
proper Setting for the FUNCTION switch.
(symbol ''*' on Roll Chart) Set BIAS at 40 VOLTS, press and
hold down button indicated in the PRESS column while rotating
BIAS control until tube strikes. The striking voltages indi-
cated are nominal values and reference to handbook Critical
Grid Characteristics of Thyratron tubes reveal appreciable
variations from these average values.
(symbol "ж" on Roll Chart) Make emission tests, only. Good
tubes will read above index mark RECTIFIERS & DIODES OK.
Not applicable.
Readjust BIAS VOLTS after button P4 15 pressed, then read Gm.
(symbol "6" on Roll Chart) A short indication on position
"A" of the SHORTS switch is normal,
Not used,
"Cut off" tube section NOT being tested by means of a 30 to
35 volt battery (Eveready 413, or equal). Polarity and con-
nections are indicated in the NOTATIONS column: e. g.,
NOTE 8: 7-, 2+, indicates connect negative lead to pin 7 and
positive lead to pin 2, of any convenient socket on the tester.
Disconnect battery between any change of SELECTORS.
THE HICKOK ELECTRICAL INSTRUMENT CO.
10514 DUPONT AVENUE . CLEVELAND, OHIO 44108
3200-201 REVISED