Heathkit IB-101 Frequency Counter: History, Restoration, Demonstration, Theory

In this video, I document Heathkit's first digital product, their model IB-101 frequency counter (it looks externally identical to their later IB-1101 product which has a higher frequency range).

I cover the history of this model, my restoration of it to fully working condition, I demonstrate it in operation, I describe the circuit theory of operation, and I also tack on to the ending a brief look at how I designed and 3D printed a new light shield for the Nixie tube display.

Once I get around to completing the CAD work, my newly CAD drawn IB-101 schematic, calibration, etc; document, and also my 3D printable "light shield" STL file, will be available for download here: www.serpentwebsite.com/fileshare.htm

Timeline Table of Contents:
00:00 Introduction & history
04:10 Restoration
08:06 Internal tour
26:11 Demonstration
32:04 Beauty shot
32:23 Heathkit manual
40:15 Schematic diagram/circuit theory
1:14:24 Designing & fabricating a light shield