You are bidding on a HICKOK TUBE TESTER MODEL 539A as can be WATCHED IN THE VIDEO and also seen in the pictures.
Feel free to watch a video of this unit working by clicking the following link: https://www.youtube.com/shorts/X61W7rmyuBE
• Please do make us your best offer or ask any questions you may have and we will respond promptly!
Description below in Italics was taken from the web:
Hickok 539 by Hickok Service Center, Inc., established in 1942. The listing is for “Parts Only” because we have no way of testing this unit.
The tester is supplied with the Original Manual.
The bench top case is made with hard wood (poplar).
A tube tester is a tool, and not an absolute device. Your experience should guide you as to the quality of the tube tested.
The reference voltages are the original Hickok Specifications.
The value of the deviations have been compensated for age and the solid state rectifier, this will have little or no effect on the accuracy of the tester.
Target Actual
Plate 150 Volts DC +/- 3 @ 1000 O/P/V 152.6
Signal 2.5 Volts AC +/- 0.2 @ 5000 O/P/V 2.51
Bias @100 40 Volts DC +/- 2 @ 1000 O/P/V 39.3
Bias @ 22 3 Volts DC +/- 0.2 @ 1000 O/P/V 3.2
Bias @ 22 3.3 Volts DC +/- 0.2 @ 20,000 O/P/V 3.44
Screen 135 Volts DC +/- 3 @ 1000 O/P/V 138.2
Low Screen 56 Volts DC +/- 3 @ 1000 O/P/V 58.5
Short Test Sensitivity 300,000 Ohms
Microhos Switch Check is within 1.2 meter divisions (2%) which is the tracking error of the meter.
6L6 Standard Tube 5,250 @ 6.31 Filament 5000
Questions- Do not hesitate to ask.
We're a small school and sometimes are not available on the weekends, not always though, we always try to check our inboxes even from home but if we don't respond on the weekends that's probably why. Most of the time though you will receive a prompt response so we can move forward.
Sincerely!
Itibere Silveira
EACH PROJECT
Ann Arbor, MI
Stock # 222605
