Hickok tube tester I-177 I-177A I-177B 117N7 pushbutton

Description

What you see is what you get.
This part was removed from a working I-177.  I pulled the bias pot from the 177 to fix a 600A, a much more valuable machine, making the 177 useless.  This part is untested and sold as shown, as is, no return warranty or refund.
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