We’re back on the Bendix baby! In today’s episode, I want to take a look at all the unique logic cards in the system, but before we get that far, we gotta get our clean on. Hop along as we take every single card out of the Bendix G-15, clean each one painstakingly, then repopulated the whole machine, and finally take a deep dive into what each card does. We also try to answer a pretty important question – is this an NC or an ANC machine? Check out System Source here: https://museum.syssrc.com/ Here's the Bendix G-15 Theory of Operation Manual: http://www.bitsavers.org/pdf/bendix/g-15/60121600_G15_Theory_Of_Operation_Nov64.pdf If you want to support the channel please hop over to Patreon: https://www.patreon.com/usagielectric 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 Intro Music adapted from: Artist: The Runaway Five Title: The Shinra Shuffle https://ocremix.org/remix/OCR01847 Thanks for watching! Chapters 0:00 Working on the Big Blue Beautiful Behemoth 1:00 The game plan 3:25 Taking every card out 5:58 If you’ve got time to lean, you’ve got time to clean 7:56 Door latches and modifications 9:18 Putting it all back together 11:04 D2 “Diode 2” module 11:56 Card edges and replacement diodes 12:48 D1 “Diode 1” module 13:35 D3 “Diode 3” module 14:20 The BI and FF cards 15:36 BI “Buffer Inverter” module 16:39 FF “Flip Flop” module 17:12 And aside about diode clamping 18:05 DC “Diode Clamp” module 18:35 CC “Clock Clamp” module 19:42 CF1 “Cathode Follower 1” module 20:54 CF3 “Cathode Follower 3” module 21:23 CF2 “Cathode Follower 2” module 21:54 RA “Read Amplifier” module 22:44 WA “Write Amplifier” module 23:42 RC “Read Clock” module 24:44 Alphanumeric (ANC) vs. Numeric (NC) 28:44 Scouring schematics for the answer 32:49 What did we learn? 34:57 Happy kitty! Here are all the modifications: Blue B3T - C7K C8K - K5P C7N - A54P C7V - C8V - A54A K34J - Loose wire B54P - Two white wires that disappear into loom Red C7C - E48R C7P - F51P C7R - B36F D16D - C54R D16E - D35V D16F - J15B D16S - D17R - E14B D17E - A28T B41k - K47V (Broken connection) B41V - H50P Yellow K7D - D30S ... https://www.youtube.com/watch?v=q9IxVi24R5Q

The universe is interesting. Sometimes, it just knows when you need a win, and it tosses you a softball. The little Hard Drive that came with the 11/83 originally should have an OS on it, so let’s plug it in and see what happens! Of course, the episode isn’t without its perils, but interestingly, they’re not related to the Hard Drive at all. So come along as I delve into a world I’ve never set foot in before! If you want to support the channel please hop over to Patreon: https://www.patreon.com/usagielectric 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 Intro Music adapted from: Artist: The Runaway Five Title: The Shinra Shuffle https://ocremix.org/remix/OCR01847 Thanks for watching! Chapters 0:00 Introduction 1:59 Send it 3:26 Whoa, it actually worked! 4:48 Time for that curveball 5:45 Status report 7:38 Repairing the VT-320 10:19 Alright, let’s try this one more time 12:20 Hmm, it froze, let’s try again 15:54 I don’t know how to use RSTS… 17:41 Bunny! ... https://www.youtube.com/watch?v=79cC4rv5Qg8

In this episode, we revisit the low voltage audio amplifier that we built many, many moons ago. This time though, we’re making one critical change – we’re eliminating the output transformers! That’s right, OTL amplifiers usually use hundreds of volts, but we’re going to attempt to build one at just 48V, and the results are surprisingly good! Here’s the schematic: https://i.postimg.cc/fLcBGPXt/OTL-AMP-Full.png If you want to support the channel please hop over to Patreon: https://www.patreon.com/usagielectric 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 Intro Music adapted from: Artist: The Runaway Five Title: The Shinra Shuffle https://ocremix.org/remix/OCR01847 Music used: Artist: Red Tailed Fox Title: Suco de Melancia https://ocremix.org/remix/OCR01671 Artist: Paper Coelacanth Title: Amarant’s Night Ride https://ocremix.org/remix/OCR04182 Artist: Sir_NutS Title: An Open Galaxy https://ocremix.org/remix/OCR03963 Artist: N-JekteD Title: Purgatory https://ocremix.org/remix/OCR01385 Thanks for watching! Chapters 0:00 Intro 2:22 OG amplifier baseline 3:23 What we’re going to change 6:08 Did this fool really say “one two B four A”? 9:20 Breadboard testing 11:30 The new hotness! 14:01 Let’s give it a listen 17:00 How does it compare to the OG? 18:12 Outro 19:20 Bunny! ... https://www.youtube.com/watch?v=qGkn6C5cd1E

In this episode, we take our first step towards building a vacuum tube computer! There’s a lot of different architectures out there, so we take a look at one that will hopefully work well for us. This is going to be a long road with lots of speedbumps and testing along the way. It should be properly fun! Also, we’re now on Discord, Reddit and Twitter, so join us! Discord: https://discord.gg/p7UsfHD Reddit: https://www.reddit.com/r/usagielectric/ Twitter: https://twitter.com/UsagiElectric Thanks for watching! ... https://www.youtube.com/watch?v=y149hLe1zYo