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Usagi Electric
Usagi Electric
Usagi Electric
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Welcome to Usagi Electric!

On this channel, we dive into old school technology, focusing heavily on vacuum tubes. My primary goal is to build computing circuits based off the legendary machines of yesteryear, only with a slight modern twist. All the tubes will be operating with very low voltages on the plate, making the projects safe and easy to follow along with. So, lets grab our multimeters, some random tubes and a low voltage power supply and have fun!

Usagi Electric covers one of my main passions, while my other main passion can be found over on Usagi Motors.
The Bendix G15 Boots!
36:12
21 день назад
A Day of Fun With MFM Hard Drives!
34:07
Месяц назад
The Most Adorable Data Terminal Ever!
18:07
Месяц назад
I Was Wrong… and It’s Awesome!
42:30
2 месяца назад
An Epic Trip Through Japan!
33:54
3 месяца назад
The PDP-11/44 Lives!
27:19
3 месяца назад
The Bendix G15 (Almost) Roars into Life!
24:04
3 месяца назад
PDP-11/44 PSU is Slowly Coming Back to Life!
22:41
4 месяца назад
The Forgotten Usagi: Ep. 02
42:31
4 месяца назад
FM is RLL, MFM is RLL, RLL is RLL! Fight me.
37:40
4 месяца назад
Assembly Programming is Hard…
20:00
4 месяца назад
The Forgotten Usagi: Ep. 1
45:13
4 месяца назад
Software Problems? Hardware Solutions!
32:18
5 месяцев назад
The Rarest IBM PC Clone in the World!
43:10
5 месяцев назад
The Mini-Centurion is Back!
21:28
5 месяцев назад
Health Update and a Really Cool Disk Pack!
6:31
6 месяцев назад
VCF East 2024 + Museum Tour + PDP8 Fun!
26:50
6 месяцев назад
Co-Op Snake on a 1980’s Business Minicomputer!
34:13
6 месяцев назад
Doing Carburetor Work on the Austin Healey 3000
19:43
6 месяцев назад
Комментарии
@thomasjackson8096
@thomasjackson8096 2 часа назад
In the fall of 1968, freshmen at Rose Polytechnic Institute (later Rose-Hulman Institute of Technology) were tasked with writing and running computer programs on a Bendix G15, using a numeric version of assembly language. After meeting that challenge, we were allowed to move on to using Fortran IV running on the school's IBM mainframe.
@LoneWolf-wp9dn
@LoneWolf-wp9dn 3 часа назад
Straight outta vault 69
@ms-ex8em
@ms-ex8em 3 часа назад
do u know much about bbc micro hard disks?? from 1982 or 1983?? i wanted to see one of the older bbc micro hard disks (8 inch type) thanks................
@avernar
@avernar 4 часа назад
My first printer was a Commodore MPS-801. I frequently printed large assembly dumps. Set it to 16.7cpi condensed superscript. Can't remember how I reduced the line spacing but I think I managed to fit like 132 lines per page. The sound it made with those settings were those of an eldritch horror from the depths of the abyss. Had to point a fan at the print head to keep it from overheating.
@primewatch8136
@primewatch8136 6 часов назад
Could you upgrade the board with highscore counter view on led byte
@Tera83074
@Tera83074 10 часов назад
I remember as a teenager these MFM drives ware a dime a dozen, as in they ware free. I had a lot of fun with them. About the RD52-A the black plastic arm that moves when the drive starts and stops, that the drive head lock. As the drives spin-up the air pushes on that arm moving it away to to unlock the drive heads and obviously the reverse as the drives spin down. This made the old "Park head" commands unnecessary.
@zaraak323i
@zaraak323i 11 часов назад
There was a Capt. Fantastic pinball machine in the bowling alley down the street from where I grew up. I spent many hours and quarters at that bowling alley!
@hotsauce2446
@hotsauce2446 16 часов назад
"Reforming" 60 year old electrolytics and saying they "look good" not just on this but on other stuff. One day somethings gonna short and blow something impossible to replace and you'll learn better.
@antonnym214
@antonnym214 17 часов назад
To feed the paper tape through, how about a 12v or 24v synchronous motor? They were in use in computer equipment in the 1950s.
@antonnym214
@antonnym214 18 часов назад
Your dog is adorable! What breed and name?
@antonnym214
@antonnym214 18 часов назад
To the channel Members: We hope you feel appreciated, because you certainly are! This is a great channel. Thank you VERY much for keeping it rolling! All good wishes.
@Rowrowthegravyboat
@Rowrowthegravyboat 19 часов назад
I’m probably not your intended audience. Actually most of what you said was gibberish to me. I trust you though I’m used to being the dumb one. That being said I’m an amateur radio operator and I love trying to see how these things work. It’s amazing to me, because I struggle to even classify this as a computer. So I’m utterly fascinated. I may have to come back and check in on the updates (ps you earned a sub) 😉
@tomsworkshop5856
@tomsworkshop5856 20 часов назад
Thanks for this. I'm no longer scared that 829b tubes can't be used in triode mode.
@JBo77
@JBo77 21 час назад
I bet all those machines have a great story to tell
@derekbambenek7803
@derekbambenek7803 22 часа назад
Ah, get excited; getting masses of circuits to cooperate is tricky business at times! Be yourself, man!
@jasonhamilton5756
@jasonhamilton5756 22 часа назад
Congratulations! 🎉
@nicodo123
@nicodo123 22 часа назад
missed opportunity to use your old intro on this video (because it involved an electric typewriter)
@karachaffee3343
@karachaffee3343 День назад
Bodine made capstan motors for Ampex professional studio tape decks --many classic recordings were laid down on Ampex equipment !
@GARCKY
@GARCKY День назад
Just found this. in 1963, one of those at Cal Poly San Luis Obispo was my first introduction into computing. Then, I moved on to writing FORTRAN programs for the schools IBM 1620. Nice blast from the past in this series of videos.
@guyandthatoneguy6538
@guyandthatoneguy6538 День назад
20:26 please put it back on
@gfodale
@gfodale День назад
I donated 3 of those printers back in the late 1990's to a friend when I was moving. No idea now what became of them, or the friend... I plan on getting a run of the mill dot matrix printer for a radio teletype setup around the first or second quarter of next year. Budget is tight, and other items have priority. I'm looking at some much quieter Epsons. Won't touch the new Epson crap, but the old dot matrix machines were good. Good luck in your adventures.
@ms-ex8em
@ms-ex8em День назад
wheres the hard disc for the bbc micro ?? any1 know ?? i typed it into google but i cannot seem to find a photo of it anywhere (the older 8 inch hard discs) thanks..........
@natec2843
@natec2843 День назад
Not totally sure, but I think "Can't halt CP" is your computer trying to get you arrested by the FBI. Lol jk.
@lorenzobachelor8452
@lorenzobachelor8452 День назад
You know because you are servicing this you have to sign the service log with your name and date for the next technician.
@scottn322
@scottn322 День назад
What an awesome contribution to computing history! We get in such a hurry for.the latest, greatest thing that it can be easy to fail to preserve things like this... but it was so important to human history, so getting it to work is fantastic.
@nicodo123
@nicodo123 День назад
Hellorld!
@WilliamForsythe-g7j
@WilliamForsythe-g7j День назад
Poor mans diode curve tracer is o-scope set to XY mode, power diode under test with x-former(s) and appropriate current limiting resistor. I would remove diode from board to test it to keep magic smoke from escaping other semiconductors. ( XY mode can be used for transistor curve tracing also, Ya just gotta have an Ah-Ha moment first...)
@гига-нигга
@гига-нигга День назад
You first need to "call -151" :)
@hotsauce2446
@hotsauce2446 День назад
Make sure the brightness is down all the way if you're powering up a crt without the yoke hooked up. It will burn a hole in the center of the phosphorus in a second.
@hotsauce2446
@hotsauce2446 День назад
Just wait till it heats up. It's awful with tubes, almost impossible to get the smell out when it's that bad.
@hotsauce2446
@hotsauce2446 День назад
Be careful getting water on the back of the CRT. Moisture/water can cause the hermetic seal between the pins and the glass to fail. Hopefully you removed the plug and let it dry.
@kevincozens6837
@kevincozens6837 2 дня назад
I really admire electromechanical devices from days gone by. All the operations worked out by hand. They are just an absolute marvel. Does the Capt. Fantastic pinball machine have anything to do with Elton John? Name used under licence perhaps?
@arneminderman3770
@arneminderman3770 2 дня назад
Best of the best! ❤❤❤❤
@zero0ryn
@zero0ryn 2 дня назад
Vinegar is good for removing dried battery juice.
@MattTheBeegBrain
@MattTheBeegBrain 2 дня назад
Have you tried chanting the proper litanys and Hymns to placate the machine spirit?
@BearMeat4Dinner
@BearMeat4Dinner 2 дня назад
Love da 74i sweater ! Last time I printed with dot matrix was back in 03!!!!
@radicalradiotech4944
@radicalradiotech4944 2 дня назад
you're a Tommy Flowers of The Millenium
@radicalradiotech4944
@radicalradiotech4944 2 дня назад
Wow that tester is just brilliant! love your show!
@juliushowlett7247
@juliushowlett7247 2 дня назад
Was the missing 011 of "0111" of "7" a checksum or torn off... or... did the bulb take some time to 'warm up' before registering data since those are the first 3 bits? I think I'm missing something here, but it's super cool you guys got this mess running again. Such good times. :)
@jnharton
@jnharton 2 дня назад
You could have used some ribbon cable (like the gray stuff IDE cables are made of) to replace that flexible film. Would be easier to make fit than fiddling with solid core wire.
@Astinsan
@Astinsan 2 дня назад
Do you like player machines? They are my favorite pinball machines.. Poorly maintained, you play as is.. its progression of skill makes them fun
@FreqBand
@FreqBand 2 дня назад
Buy some accurate resistors ? Based on the importance and scale of the job... couldn't you get two accurate cal resistors ?
@darthmemeious9526
@darthmemeious9526 2 дня назад
When the pc was brand spankong new, it needed a diaper. And now its old. And needs the diaper again 😂😂😂
@martinwidmer5961
@martinwidmer5961 2 дня назад
Would you not want to replace ALL diodes to avoid more malfunctions coming up soon?
@jub8891
@jub8891 2 дня назад
bend wat?
@robjw66111
@robjw66111 2 дня назад
what a classic collection, you still find ones like this i bits of southern europe in small bars or resturants. they are great to play! I shold make space int he house ! lol.
@DrGooseDuckman
@DrGooseDuckman 2 дня назад
I fixed mine with WD-40. 🏴‍☠️
@3SPKY5U
@3SPKY5U 2 дня назад
As a civil engineer and retro computing nerd, this thing is double cool for being used to do grading calculations.
@68CHUCKLES
@68CHUCKLES 2 дня назад
AWESOME printers ! I have one been working since 1982 and still does. They came with several i/o options. Litton made the printhead positioning motors. I want to find a parallel i/o card for mine. I believe they even have a printhead alignment mode where they print a pattern on paper, one line.
@hotsauce2446
@hotsauce2446 3 дня назад
You should bring these things up on a variac with a load equal to its current draw in series with it to keep from having a cap short and blow something when you first plug it in