Hickok 539B Tube Tester
With added 2mm AC Line & Bias Jacks for Digital Meters
Clean & Calibrated
 
Includes three new socket savers to be installed before shipping and not seen in the pictures; a 7 pin-min socket saver, a noval (9-pin) socket, and an eight pin octal.
 
See pictures 6, 7, 8, 9 for calibration specs, some additional notes, and relative information for this 539B. 
Hickok 539B with Bias & AC Line Jacks for Digital Meters Calibrated & Clean. All the meters are accurate. New capacitors and added protection diodes for the meter. 
 
See pictures 6 thru 9 for calibration specs and information that includes the added bias and AC line jacks for this 539B. These pages should tell you all you need to know about this 539B.
 
No trick to use the jacks just plug in a multimeter or other accurate DCV digital meter in the 2mm sockets, red to positive and black to negative (bias set to read positive voltage although negative voltage is being applied), and it will read the actual DC bias voltage being applied in the test. Same with the AC line jacks except positive and negative does not matter; just plug in a multimeter or accurate digital ACV meter in the 2mm plugs and it will read the actual AC voltage.
Please see the calibration information in the pictures.
 
The Fluke Multimeters seen in the photos are not included and shown for demonstration purposes only!
 
Free Insured Shipping in 48 Contiguous USA
Please contact in advance of purchase for shipping costs internationally. The cost for shipping in the USA will be deducted from the total cost of shipping when shipped internationally.