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 | Part 2 is available here: www.youtube.com/watch?v=KgaCQdxR3r0 Комментарий от : @TechTangents |
 | LOVE your Videos ! p.s. Bottom of my Model 4 Does NOT have the metal mesh screen pieces Комментарий от : @780tech |
 | I've found several different system power supplies that include footprints for both size X capacitors. Makes it pretty nice because everything will fit smoothly regardless of which options you use. Комментарий от : @InfiniteBrain |
 | The mesh helps to avoid bugs haha 🌈 Комментарий от : @robertschnobert9090 |
 | 6:10 "... and the chips have a date code of 1984". Um, that big Intel chip in the middle, the most prominent one in the shot, says 1982. Комментарий от : @IrishCarney |
 | Loctite super glue uptains full bond strength in 10 min, full cure time is 24h Комментарий от : @Handskemager |
 | Oh man, just ONE of my monitors at work uses 100W when it's on! Комментарий от : @233kosta |
| Line filter caps are mainly there for noise suppression - stop it backfeeding interference through your house's wiring (which at that point becomes a giant antenna). Removing yours won't kill anything, but it will also most likely demolish any hope that PSU had of ever being FCC compliant. I'm pretty sure you can get filtered sockets (or extension leads), and I'm quite certain that you can just get inline filters to add to the power line yourself, but you're 100% on this - it's best to just replace the bad cap, do the job right. Комментарий от : @233kosta |
 | Ah, the "Reefer" caps. I had one let go in a sewing machine and one in a food mixer. They get everywhere! Комментарий от : @tim0steele |
 | Bro are you interested with old network equipment? We will soon disposal a lots of maybe 20yr old stuff.. if you want some let me known Комментарий от : @BOBY_K |
 | I would have just soldered a wire to the trace that connects to the broken piece of the card edge (looks like there's even an unpopulated through-hole just above the broken piece that you could solder a wire into), then spliced another wire into the edge connector harness, and connected the two wires with a Molex connector. No worrying about a fragile repair doing it that way. Комментарий от : @MaximRecoil |
 | anyone else see that loose little screw at 23:22 waiting to cause a short? :) Комментарий от : @pinfarmer |
 | old Комментарий от : @fe90 |
 | Bodge wires: fixing a bad PWB instead of throwing it away? Комментарий от : @JCMayPE |
 | We had one of those in the local library way back in the day Комментарий от : @bramvandenbroeck5060 |
 | Heat Synced Diodes was the name of my high school garage band. Комментарий от : @Godzilla_Jesus |
 | That Wyse terminal in the ad is gorgeous. Комментарий от : @Dreams_Of_Lavender |
 | can confirm there is no mesh on the bottom of the model 3 Комментарий от : @natgeohis |
 | i can only imagine the direction my life would have gone if my trs80 color programmable computer would have not overheated in the middle of every program i ever wrote. I think it was Q-basic? or color basic. It hooked up to duel dial color television. It needed a fan BADD! Комментарий от : @DS-es7id |
 | Negative -9v is 25% less than -12v ..... WAY out of spec.... 5% max either way with voltage or you are begging from problems. Комментарий от : @GORF_EMPIRE |
 | Cool idea 👍 think about doing month dedicated for Amstrad/Sinclair Комментарий от : @WolfKenneth |
 | Contrary to the claims of the uninformed, rosin flux is non-corrosive when cool. That is why it is used in electronics. Flux residue may be ugly, but it will not cause problems at room temperature. Комментарий от : @richardkelsch3640 |
 | I’d love to use a terminal like this to do maintenance on a Linux server Комментарий от : @askhowiknow5527 |
 | that psu looks very dodgy Комментарий от : @letterslayer7814 |
 | My first computer was a Model 4 back in the early 90s, a couple years before I got an IBM XT with 2400 baud modem that let me get on the internet (shell only of course). Had a lot of fun messing with it, but it didn’t have any games. Got it from a relative who sold insurance, and it only had stuff like Lescript and VisiCalc; not terribly fun for a 12-year-old. But at least it had a printer. Had a 300 baud acoustic-coupled modem I found that I tried to use as well, but didn’t have any terminal emulation software with which to use it. Wouldn’t mind playing with one again. Any ideas if there were games made for these models? My understanding is they were for business and the TRS-80 CoCo was the one for games. Комментарий от : @filminginportland1654 |
 | Radio Shack had a reputation for reason back when they made their own stuff. Комментарий от : @iceowl |
 | I just cracked mine open last night. It has bodge wires all over, too. Video will probably get posted late tonight, if you are interested. Комментарий от : @Lee_Adamson_OCF |
 | The screen is to prevent bug entry, a problem several friends of mine had with their Model 1's. Комментарий от : @WilliamHostman |
 | with my model 3, i got lucky with the keyboard, only the #9 key on the right keypad was not working, i re soldered those two pins and now it works. it has two power supplies so i had two of those filter caps to change, and mine also has to heat sinks. Комментарий от : @rottmanthan |
 | crt power draw is a myth? nope maybe in older low res variants power draw is about the same as an lcd of the same physical size but I literally tested a 50" crt reflector type tv vs the LCD replacement and it was 60w vs 10w and the resolution was only a tenth of the lcd now it is true retro crt's under 640x480 might be about the same as the lowest tier LCD since 90% of LCD power is backlight but get bigger than a small monitor and power draw IS higher than an LCD at the same brightness Комментарий от : @christopherhauck4702 |
 | I bought a model 4P which is the portable model 4. It cost around $4,000 at that time circa 1982. Комментарий от : @charlesmurphy1510 |
 | I used to have one, but the Y key was broken. Very difficult to save the settings... Комментарий от : @pcuser80 |
 | 23:27 what is with the tiny screw shorting out the pins on U6? Комментарий от : @ElectricEvan |
 | We still had a couple of "dummy" terminals remaining when I first started in the business world in the mid-90s... And they finally disappeared and were replaced by pc-based 3270 emulators.. Комментарий от : @KevBehindACamera |
 | But can it run Fortnite? Комментарий от : @MemesnShet |
 | AkBKukU: "It's just two screws, right?"... Me: "AkBKukU, when will you learn?!" Комментарий от : @joenyland4833 |
 | The heatsunk diodes are 'Avalanche' diodes, similar effect to Zener, but more for circuit protection by 'clamping'/'crowbarring' current during over-voltage conditions than the Zener approach of regulating the voltage nearer the target voltage. Комментарий от : @TinWhisker |
 | Took less than 10 seconds to subscribe. Комментарий от : @Horzuhammer |
 | Do you think some Sugru on both sides of that chipped-off piece of PCB would further reinforce the repair? Комментарий от : @brycelynch2138 |
| The in-picture tight zoom on your voltmeter was a really nice touch - I like it. Комментарий от : @brycelynch2138 |
 | I remember these............. But the cool one is the teletype with the acoustic coupler.......... Комментарий от : @clangerbasher |
 | First-time viewer, first-time caller. Fantastic video dude. Love this stuff from back in ye olden days. Indeed, power supplies of the era were often fixed to a specific input voltage. In the pre-globalized world, products were intended for a specific market. A European version, for example, would have likely had a different PSU from the North American version. Today, with ultra-cheap universal switching PSUs, that makes little sense. The only difference is the plug on the line cord. The Apple II was an exception. Its switching PSU—very uncommon for the time—could be used on either 120 or 240V. Комментарий от : @Starchface |
 | Fan, wire mesh, multiple wires soldered in... First casemod and first modchip in computer history discovered. Комментарий от : @Loenne555 |
 | The Input Filtering is, while called input filtering (X&Y Caps + the Coils), not to filter the Input but to filter the crap coming from the PSU to the mains. So yeah, you can remove that without issues, if you have good AC coming in and not use 10 of them at the same time. And get some Desoldering Wick or braid... PS: Its -12V/0,1A and +12V... Комментарий от : @Stefan_Payne |
 | X1 capacitors have a better rating than X2 capacitors but it should be ok. Комментарий от : @MrMaxeemum |
 | Drop of epoxy on the back. Комментарий от : @ChristopherCobra |
 | The mesh could easily be part of some environmental shielding. We had to do the same with kit we sent to the tropics to stop bugs climbing inside Комментарий от : @captainboing |
 | OMG, I used to work for Tandy (radio shack Australia) and used to repair those and every other computer they had. lol the Model 1, the worst lol The mesh keeps the large cockroaches out ;) Комментарий от : @phizicks |
 | The low serial may be because it's from Canada. From what I remember they used their own serialized stickers that didn't necessarily match production serial numbers. Комментарий от : @riffraff60 |
 | I sold the last of my Tandy machines a couple years ago, but here's some reference pictures from my Model 1, Model 3 and CoCo3. flic.kr/s/aHsmH1oLKf Комментарий от : @SenileOtaku |
 | My oldest computers is a trs 80 model 100 Комментарий от : @foxknapp2199 |
 | In Japan they have 50Hz and 60Hz. Maybe the Psu was also sold ther? Комментарий от : @user-cz2ef6dq3k |
 | They might've started a new serial range per year? Комментарий от : @Nukle0n |
 | I see comments on that neg-12 voltage being low. These supplies are meant to be tested under load, the neg 12 isn't really regulated, just zener clamped IIRC. Once you're pulling an amp or so from 5 and +12, it'll probably pop right up to 11-13v just fine. I ran a computer repair shop back in the '80s, Trash-80s were a favorite. Converted soo many model III and 4 cassette models to floppy based back then, adding drives, controller and power. Bought a couple 100 of this style P/S when Osborne went under, kept me in rent for quite a while..:) Still have a few parts and bits rattling around. And a few model 100s.. Loved those things... Stu Комментарий от : @TinkerbatTech |
 | The next time you use CA (super) glue to repair something like this, use some baking soda as a catalyst kicker to instantly cure, harden, and strengthen the joint! It works really well, but sets almost instantly... so be warned! Комментарий от : @tekvax01 |
 | Nice alarm clock, I had one just like it, made me late a number of times then I bought a cheap sony dream machine in which I still have the guts of it and the radio still works. No clock though. Could you remove the logic ground wire(the one where the connector on the board is broken) and just solder it to a point on the board that is connected to the pin that was broken? Комментарий от : @coondogtheman |
 | Wow, that is so like an old Sperry Univac data terminal of the same era, cut my teeth programming on an ol' Sperry til I got kicked off the course for hacking the college's mainframe which was linked to the county council's even more interesting mainframe, happy days of a misspent youth ;) Комментарий от : @dodgydruid |
 | You posted a picture of an online 1984 main cpu board. It's very possible the bodge wires were on the back.... Just a thought. Комментарий от : @timfountain98 |
 | It wouldn't be a Tandy computer without bodge wires! Комментарий от : @Nf6xNet |
 | Thanks for showing this,you do have alooot of technical dkills & knowledge ,but i only wish you called it part 1 sothat we can prepare ourselfes for part 2. Комментарий от : @johneygd |
 | Radio Shack had great computers at one time. I had the Color computer that hat he Motorola 6809. Комментарий от : @nimrodquimbus912 |
 | I saw AkBKukU at a Radio Shack yesterday. I told him how cool it was to meet him in person, but I didn't want to be rude and ask him for photos or anything. He said, "Oh, like you're doing now?" I was taken aback, and all I could say was “Huh?” but he kept cutting me off and going “huh? huh? huh?” and closing his hand shut in front of my face. I walked away and continued with my shopping, and I heard him chuckle as I walked off. When I came to pay for my stuff up front I saw him trying to walk out the doors with like fifteen class X filter capacitors in his hands without paying. The girl at the counter was very nice about it and professional, and was like “Sir, you need to pay for those first.” At first he kept pretending to be tired and not hear her, but eventually turned back around and brought them to the counter. When she took one of the capacitors and started scanning it multiple times, he stopped her and told her to scan them each individually “to prevent any electrical infetterence,” and then turned around and winked at me. I don’t even think that’s a word. After she scanned each capacitor and put them in a bag and started to say the price, he kept interrupting her by sounding the alarm on his Casio Databank watch. Комментарий от : @RealRonaldThump |
 | Nice serial terminal. I'm sure it had many great years interacting with Unix and/or mainframes and mini computers. Комментарий от : @substance1 |
 | ✔🥇✔ Комментарий от : @kacper9207 |
 | Wow dodged the line filter bullet, good job man xD Комментарий от : @JonTheGeek |
 | Love that Tandy. I'm totally with you on the keyboards. My TRS-80 Model 4 also needs the keyboard disassembled and either cleaned or possibly add silver conductivity to the pads, but because it's so much work, I've opted for the 'Press Keys Harder/Longer' method instead. :) At least I have a desoldering station now, so it shouldn't be quite as bad when I get around to it. Комментарий от : @brianv2871 |
 | I was wondering why yout DT-1 had french text on it, well, now I know, it comes from Canada :3 Комментарий от : @NintenloupWolfFR |
 | Thanks for titling your list "Problems" instead of "Issues." Комментарий от : @WardCo |
 | At least the fan didn't cause any permanent damage to the case, no holes to deal with. Love the repair work on the connector, hope it works! Комментарий от : @ColdRFusion |
 | might i recommend a hakko fr-301? i love mine! Комментарий от : @kaylaandjimbryant8258 |
 | JB Weld epoxy will provide a much greater bond than crazy glue and can be sanded down to form any shape needed. Комментарий от : @bryandepaepe5984 |
 | I do have a TRS-80 Model III, any suggestions as to what to replace first? cap wise? it has not been touched in probably 25-30 years. I haven't even opened it, its just sitting on a shelf gathering dust. Комментарий от : @juddsandage |
 | A part of Japan is on 100v 50Hz Комментарий от : @user-vs9pg1rj9d |
 | Oh cute the case even has the drive bay openings. Комментарий от : @pixelflow |
 | Super glue takes up to 24 hours to fully cure, even though it seems to cure much faster. It will be stronger the next day. Комментарий от : @chuckhole |
 | the power suply have bad caps.........change it!!! Комментарий от : @RatRodArgentinaJorgeENuviola |
 | Nice Barbies you sent to LGR, Shelby :) Комментарий от : @stevesmusic1862 |
 | 27:28 "Don't touch that! Poke poke." lol Комментарий от : @Nanospark0 |
 | First comp was a model 4. Was pretty nice for gaming. Upgraded to a Tandy 8088 for a few years till I got a proper Gateway P166 and WOW that was the shiz for me! Комментарий от : @Hurricanelive |
 | Working with either 50hz or 60hz but only 115(range) voltage means it works in throughout Japan, which has 50hz in the east, and 60hz in the west, all at the same voltage. I bet the maker also sold that power supply there. Комментарий от : @solarbirdyz |
 | 20:15 he said “ssweet” and the fucking clock rolled, most satisfying thing ever Комментарий от : @TheGabri00 |
 | There are a good variety of CRTs which will work in there- the JIS version of that CRT, which should be a bit more common, is the 310GNB31. Комментарий от : @douro20 |
 | Fixing that card edge it is better to use a thin piece of plastic on the non-contact side, and instead of solder remove all the solder and use some thin copper then solder it. Then the crack will be covered on both sides and be much stronger than just using solder and superglue. Superglue is much stronger when the surface area is increased. it is stronger between two flat sheets than on the edge. I say this because of my experience in repairing boards for cranes and other warehouse equipment. The best repairs are ones that you never need to do again, and my preferred choice. Spend a little more time making a slight modification so it will not break again therefore never see it again and even better never see it again under warranty. Комментарий от : @Paul-gz5dp |
 | Where is part 2? I must see this thing work! Комментарий от : @bennetfox |
 | Perfect Click without any doubt. Комментарий от : @retro8263 |
 | You could've asked Mead Corp. to sponsor this video. Комментарий от : @stickoutofthemud |
 | I love your hair Комментарий от : @jamesdoe4515 |
 | Can't wait for part 2. Комментарий от : @kaczan3 |
 | If the wire mesh is not all grounded together, it's not for shielding. Presumably it's for dust. Interesting that they'd bother with that with no stock fan in the case. Комментарий от : @Psychlist1972 |
 | -9v on a -12v rail is not good. Change the caps, three of them looks bad on top cover. Комментарий от : @santi308 |
 | #SepTandy? Love it! ^^ Great restoration project, can't wait for part 2! Please keep up the good work! :D Комментарий от : @Ramsis-SNES |
 | you need some new electrolytic caps on the powersupply Because it should read -12 volts not -9 volts Комментарий от : @richardbrobeck2384 |
 | I wonder if that board with all the bodge wires was a factory refurb that went into an early unit that went in for a warranty claim? Комментарий от : @Mikeywil0003 |
 | Where is part 2 ? Комментарий от : @ottv1324 |
 | The line filter cap has nothing to do with protecting the device itself. It's just there to prevent the device from putting out interference on the power lines that could affect other devices on the same power line. Комментарий от : @jtsiomb |
 | That ending felt weirdly like a cliffhanger haha Комментарий от : @CattoRayTube |
 | Your editing or whoever edits this is really good, like 10/10 good. Комментарий от : @happyguy5025 |
 | remember, super glue and backing soda Комментарий от : @MakarovFox |
 | Tbh waiting for part 2 AAAAAAAAAAAAAAAAAAAA Комментарий от : @DEMENTO01 |
 | This is so gnarly, I love it 💐 Комментарий от : @hesterhenrietta261 |
