Hickok Electrical Instrument Co
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Western Electric / Hickok tube tester KS-15560-L1 vs KS-15750-L1 ?? How do they compare ? From what I have seen , the 750 seems to be similar to the 539 ( 750 having a more stable power supply ) . I cannot find much information on the 560 . Can anyone help with this ? Is the 750 a more desirable tester than the 560 ? Thank you for your help !!