In-depth Look at the HP AC-4G Decade Counter

I asked, y’all delivered! This was by far and away the most requested of all the projects I’m currently working on, so without further ado, enjoy the beautiful Hewlett Packard engineering! If you’re not sure what on earth I’m talking about, check out this video: https://youtu.be/7MXy6WZj77I Check out Ray Fantini’s fantastic video on the HP Frequency Counter: https://youtu.be/3ka1wwvex5o Here’s the excellent reference data on the HP materials: http://hparchive.com/Catalogs/HP-Catalog-1959.pdf http://www.nixiebunny.com/hpac4/hpac4.pdf Also, we now have some epic shirts for sale! https://my-store-11554688.creator-spring.com Come join us on Discord and Twitter! Discord: https://discord.gg/p7UsfHD Twitter: https://twitter.com/UsagiElectric Thanks for watching!