Fluke 893A
35:23
21 күн бұрын
Tektronix 1503B
40:34
Ай бұрын
HP µLab - Take 2!
21:41
Ай бұрын
Fluke 8375A DMM - Part 2
29:09
2 ай бұрын
Fluke 8375A DMM - Part 1
29:14
2 ай бұрын
Sinclair MTV1
28:35
3 ай бұрын
Fluke 5100B - Part 3
26:17
3 ай бұрын
Fluke 5100B - Part 2
26:40
3 ай бұрын
Fluke 5100B - Part 1
27:24
4 ай бұрын
Loewe-Opta - "Bella" - Part 1
27:07
Philips PM5705 Pulse Generator
30:55
HP-3476B Cleanup
20:09
5 ай бұрын
HP1607A - Logic Analyzer
33:48
6 ай бұрын
Workbench Island: Drawer Update
12:59
Philips G7000
16:50
8 ай бұрын
Time Clock - Part 2
23:11
9 ай бұрын
Time Clock - Part 1
22:59
9 ай бұрын
2024 Channel Update!
2:45
10 ай бұрын
Heathkit T3 Rebuild - Part 2
23:29
10 ай бұрын
Heathkit T3 Rebuild - Part 1
25:57
11 ай бұрын
Altix Shutter Repair
17:09
11 ай бұрын
Update: Vintage Headphones Upgrade
6:09
Brother M-1109
19:13
Жыл бұрын
Commodore C64 Cleanup
15:18
Жыл бұрын
Пікірлер
@HeyBirt
@HeyBirt 21 сағат бұрын
"...could count on 1 or 2 paws..." Hmm...but if you are a mitten paw that might raise the # of games by 30% or more :)
@Kids_Scissors
@Kids_Scissors 2 күн бұрын
saw the puppet and instantly subscribed lol never seen a channel mascot quite like this! very cool
@ForgottenMachines
@ForgottenMachines 3 күн бұрын
35:18 I particularly like your music choice for this section
@ForgottenMachines
@ForgottenMachines 3 күн бұрын
This is absolutely amazing! I found you on Member-yt channel on Usagi's server...excellent video production!
@atkelar
@atkelar 2 күн бұрын
Thanks!
@sideburn
@sideburn 3 күн бұрын
I finally dove back into my faulty one today... I had cleaned the corrosion, fixed broken traces (this one was really damaged from the battery), put new nicads in it and recapped it. And it worked for a while and then the VHF (I am in use and using a vhf modulator) went out. I pulled all the varicap diodes out and one of them had a pretty high iR reverse current. These doses are unmarked so I didn't know what type they were but found some within the specs of VHF (MV2109's) and swapped out all 4 and its working now... I am going to burn it in for a while and then reassemble. So far so good! So if your tuner goes out it looks like MV2109's are a working replacement.
@HeyBirt
@HeyBirt 3 күн бұрын
I am the guy who had the brass replacement gears made. Like you I first tried to figure out how to machine them myself but the 0.25m size made that difficult. Even finding someplace to make a small number of them (i.e. a few thousand) was difficult. The Y-axis (paper feed) anti-backlash gear also tends to crack at the hub. You can 'patch' those though. I did a video on that and have had some success with resin printing them.
@atkelar
@atkelar 3 күн бұрын
Small production runs of anything with tight tolerances are difficult indeed. Any long term "studies" for the interaction of the brass gears with the plastic ones? That's the main concern I have. If the entire gear train were metal, I wouldn't see a problem, but mixing them seems like creating the next weak spot?
@HeyBirt
@HeyBirt 3 күн бұрын
@@atkelar There are two failure modes w.r.t. a plastic and metal gear meshing. If the gear material is glass filled nylon (very common) the abrasiveness of the glass will destroy the metal gear. The other issue is the increased strength of the metal vs plastic will cause the metal gear to break the plastic. In this case the stepper motors used are very weak. The motors will stall long before there is a chance of gears breaking. Also consider that the torque at the motor pinion is much lower that at the other end of the gear train and no gear teeth break at the other end. I've run the brass gears for hundreds of hours now with no visible wear issues.
@KeritechElectronics
@KeritechElectronics 4 күн бұрын
Oh my goodness, these E&L Instruments boards are a thing of beauty and a joy for ever! I absolutely adore those toggle switches. Good restoration and mod job on that one. BTW, try a hairdryer for removing those pesky stickers. A heat gun or hot air station turned really low should also do the trick.
@CuriousMarc
@CuriousMarc 4 күн бұрын
The 5V BNC plugs at the back of the HP breadboard is to power the logic probes that came with the kit. I think mine came with the manual, and that I scanned it. Bark at me (or meow) if you’d like a copy of it! [Edit] Oh, I see now, you have the manual too...
@atkelar
@atkelar 2 күн бұрын
I expected that after reading the service manual and seeing that it came with the logic probe and pulser... but those usually come with hooks and "loose ends" to connect to pin headers. Were there adapters for BNC? And yes, the service manual is accounted for - the big set had two educational books aparently. A commenter has them, but they are too brittle to scan. [EDIT] no sooner I wonder about the BNC connector, I keep finding probes that come with it, instead of the hooks. Rather strange indeed!
@dcallan812
@dcallan812 4 күн бұрын
Oh there really are lots of different board's I might have to go down my own rabbit hole. 🤣🤣 Great video 2x👍
@atkelar
@atkelar 4 күн бұрын
Careful! Don't forget the safety gear! 😁
@mahuitron
@mahuitron 5 күн бұрын
Saludos desde México!! 🇲🇽
@Pulverrostmannen
@Pulverrostmannen 6 күн бұрын
A double re-cap eh. it does not become more Atkelar than that he he. pity on those diodes. I did a repair on my M audio keystation 49 I have in my studio that had given up the ghost in the most weird and bizarre way possible making it go absolutely haywire sending out midi commands until the computer panic, turn on tons of indicators dim in flickering patterns and not working at all. I was looking for the fault for hours on end and I just could not find it. I had a strange signal on the scope that somehow seemed to appear from nowhere disturbing the boards. I re-cap, changed transistors, disconnected boards and de-soldered everything I could from the board making it just the basic midi interface and nothing, I took off the display and cut off traces from where the signal was. I was going nuts. you know what it was? in the end the fault was the Red Power LED that was defect, and yes it was lit up perfectly too. the issue was even more weird, it had a constant but non symmetric permanent pattern reverse polarity leakage through it, you heard me right, in some way the signals in the board made the LED leak in reverse while being lit that gave a constant exactly defined pattern on the scope that was a combination of the real signal and the LED itself leading to a complete mayhem in the board. that´s why I had this signal seem coming from nowhere because it came from the stupid LED. if this was not enough you could not measure the leakage with the LED out of the board either. it only happen at certain frequencies. I was like give me a flippin break how is this even possible moment. but replacing the power LED solved the issue and the keyboard have worked ever since.
@JohnJones-oy3md
@JohnJones-oy3md 7 күн бұрын
Minor correction - these are solderless breadboards.
@atkelar
@atkelar 6 күн бұрын
Indeed; but I've ssen that distinction only when ordering them. In casual conversation, I'm not sure if I've ever heard that detail. Most of the PCB ones I see referred to as "perf board" or "prototyping boards" instead? Is that common?
@dafoex
@dafoex 7 күн бұрын
I have a little panel from something (i don't know what) which has an off-off switch. It also has a normally-maybe push button!
@atkelar
@atkelar 7 күн бұрын
Oh, the maybe buttons are sneaky! 😸
@wall_k
@wall_k 7 күн бұрын
I giggled so much during this one, thank you! Such a dirty video haha What is the lube you've used for the pot? PTFE?
@atkelar
@atkelar 7 күн бұрын
The white stuff is "silicone grease", the dark stuff is "Molykote". The silicone is fine for just about everything plastic, the Molykote is perfect for metal/metal IMHO.
@smudge3446
@smudge3446 7 күн бұрын
That puppet is really cute
@atkelar
@atkelar 7 күн бұрын
Awww 😊
@HeyBirt
@HeyBirt 7 күн бұрын
Good job! You can use spray glue (3m Super 77, etc.) to glue thin metal to cast acrylic, cut the shape, then soak the acrylic + part in acetone to release it. I have also sandwiched thin metal stock between two ~3mm pieces of cast acrylic to allow for drilling holes without distorting the thin metal stock.
@atkelar
@atkelar 7 күн бұрын
Thanks for the tip! I need to find some acrylic scraps; new stock is too expensive to waste ^^
@restcure
@restcure 8 күн бұрын
There may very well be larger, but that is the largest axial capacitor I have ever seen.
@leongyokeloong5083
@leongyokeloong5083 8 күн бұрын
The black cat is highly educated.
@Kids_Scissors
@Kids_Scissors 2 күн бұрын
high intelligence specimen
@kandarthecougar
@kandarthecougar 8 күн бұрын
Atkelar has catflu! 😷😁👍
@atkelar
@atkelar 8 күн бұрын
I'm more of a summer cat... I got stuffy nose from October to May usually.
@kandarthecougar
@kandarthecougar 8 күн бұрын
@atkelar Poor kittycat 😊
@jmpeax3596
@jmpeax3596 8 күн бұрын
7:55 - I don't know if that's the right decision - remember: in case of tantalum, "cap" is spelled with an "r"
@atkelar
@atkelar 8 күн бұрын
Ineed, but these are the tubular expensive, NASA grade ones... they should be fine *knocks on wood* :)
@JamesHalfHorse
@JamesHalfHorse 8 күн бұрын
Is deoxit technically dipping oil for breadboards? I have found breadboards of varying quality online but I have yet to find anything decent for a holder that has any sort of switches or indicators much less a power supply. I see one on Amazon that is just a frame and some banana jacks. Unfortunately I live in a place that now that Radio Shack is gone I am probably the most well stocked and that is not saying much. Theres no surplus, recyclers and got to travel a while for a decent hamfest so whatever is currently for sale or on ebay is about all I got. I was shocked pun intended to find a new oldstock linear power supply for a broadcast console made in the 90s by a company out of business quicker than I could rebuild the one in it and probably cheaper if you count overnighting parts from digikey. That and storm damage took up my week. Got reminded why not to be in a building connected to a 500ft lightning rod in bad weather too. Fun times. I am going to borrow that 180 grit joke next time I am cleaning faders at work.
@atkelar
@atkelar 8 күн бұрын
Not sure if ebay works for you, but there seems to be a good supply of these almost all the time. Schools are replacing them usually, as evident by "one of 10+" offers. I have my eye set on some, but one has to look closely at the price tag: there's at least one offer out for about 450$ for that CD-1 model I have here... that's about an order of magnitude too high.
@JamesHalfHorse
@JamesHalfHorse 8 күн бұрын
@@atkelar I will have to look then. I don't know if I have looked for specifically them used but finding them new wasn't giving much result.
@jorgedanielcorvatta1317
@jorgedanielcorvatta1317 8 күн бұрын
Excellent work.. congratulations.. 👍
@LaserFur
@LaserFur 8 күн бұрын
14:13 have to watch out for those Off-Off switches . ;) One issue I had with breadboards was too much capacitance between the rows for higher frequency operation.
@atkelar
@atkelar 8 күн бұрын
I think it should be fine up to around the low MHz range; but for anything truly RF, it's certainla a problem. If a PCB would require hand routed traces for the signal paths, a breadboard isn't oging to work for sure.
@YuriyKrivosheyev
@YuriyKrivosheyev 8 күн бұрын
Great! Thx!
@davidv1289
@davidv1289 8 күн бұрын
Thank you for another interesting video! The magnetically attached breadboards are a great idea. If you are still looking for more breadboarding options, look for the Knight Electronics Mini-Lab. It has +5, +12 and -12 volt regulated supplies, 0 to +18 and 0 to -18 volt adjustable supplies, a clock and function generator 1 Hz to 10 kHz with sine, triangle and square with adjustable zero offset, plus 8 de-bounced switches, 8 buffered LEDs, two buffered momentary "pulser" switches, and a 1 k and 10 k potentiometer. They show up occasionally on eBay for a reasonable price. Regards, David
@gothesouthway
@gothesouthway 8 күн бұрын
I'm bored of bread, I just want the hand puppet.
@gryffuscze
@gryffuscze 8 күн бұрын
Whaaat? A new Usagi Electric and Atkelar videos on the same day? What is this, early christmas? :D :D AMAZING! :D
@byterock
@byterock 8 күн бұрын
Yep the logic lab. I have a 100% complete (even with the ics) one I picked up a while ago, it also came with a case and two books, and an optional logic pulser and probe and one other over the IC dongle. Unlike other HP stuff the two books are in a word 'fragile' They will fall 100% apart if I try to scan them. Will have to make a vid on them some day. The breadboard on the logic-lab was removable so students could have differing projects on the go, or as I was told to take your work up to the teacher to have it checked or debugged as well in once course the student would pick up the breadboard with a 'Faulty' circuit and it was her job to find and fix the problems. Also according to local lore the designer of the box for the logic lab went on to work fro Apple and designed the cabinets for the the APPLE ][ line of commuters. Another great bread board are the 'Knight ML-2010 Mobile Lab' as it had nice size bread board and it could take 5X3.5perf board as well and it had a built ins function generator a ramp/sweep and pulse generator even three data buses all in a heavy duty AL case.
@atkelar
@atkelar 8 күн бұрын
I did manage to score an affordable set of the logic probes/pulser a few months ago, so all I'd be missing to follow the labs for fun would be the lab manuals - I guess I could order the ICs. Indeed scanning larger books is difficult, I'm still struggling with the one for the µLab. I'll have a look out for the Knight one, thanks for the tip!
@byterock
@byterock 8 күн бұрын
@@atkelar I know where one is for sale about 200$ drop me a line if you want the link to the sale. Scanning the books would not be hard one is the 'course' proper the other just an intro to logic ics and some data sheets. The problem being they will completely de-bind if I do it ;)
@atkelar
@atkelar 8 күн бұрын
KZbin about page on my channel should show contact info. Depending on shipping and my bank account, this does sound interesting 🤔😁
@MarvinFoxy
@MarvinFoxy 8 күн бұрын
English is difficult for me, but it is very interesting to watch
@atkelar
@atkelar 8 күн бұрын
My native language is German, but for international audiences... I have to keep it in English. The subtitles are coming up in a bit!
@jspencerg
@jspencerg 8 күн бұрын
​@@atkelar We appreciate your English narration.
@DerKlemm-Crafter
@DerKlemm-Crafter 8 күн бұрын
​​@@atkelar Your english is very good
@pglick123
@pglick123 8 күн бұрын
Thanks! To help buy more cotton swabs.
@atkelar
@atkelar 8 күн бұрын
Thanks!
@evanrhildreth
@evanrhildreth 8 күн бұрын
In my opinion, wire wrap is so much better. The circuits are much more robust, and can be used as a permanent circuit. With bread boards, you pretty much have to duplicate your circuit on a soldered pcb if you want to keep it.
@atkelar
@atkelar 8 күн бұрын
It's a bit hard to come by wire wrap pototyping stuff these days though. The only thing I have is some euro PCB card connectors for wire-wrapped backplanes.
@DustinWill
@DustinWill 8 күн бұрын
Agree with everyone else. Great video.
@Wolfram53
@Wolfram53 8 күн бұрын
Excellent ! Thank You !
@e7yu
@e7yu 8 күн бұрын
Hi, Atkelar I found the manual for the HP 5035T, but KZbin wont let my reply message to your video stay. Do you have a way for me to show you the page link.
@mrwho30
@mrwho30 8 күн бұрын
KZbin does not like links in the comments, you have to be a lil bit "resourceful" to make it undetectable for youtube itself. Underlines, spaces and plus symbols instead of dots and backslashes works wounders.
@e7yu
@e7yu 8 күн бұрын
😸
@atkelar
@atkelar 8 күн бұрын
😸
@e7yu
@e7yu 8 күн бұрын
@atkelar Hi, Atkelar I found the HP 5037T manual on the web as a . PDF Do you have a fan email or discord or telegram that I can send you the link to.🤔
@PapasDino
@PapasDino 8 күн бұрын
Nice work as usual! Only issue with breadboards is increasing frequency is a limiting factor, not great for RF in general but very useful for most low frequency analog and digital stuff.
@byterock
@byterock 8 күн бұрын
yep that is a lost art, though till used in many military and space applications.
@atkelar
@atkelar 8 күн бұрын
Indeed, RF is dark magic 😅 - I'm happy to be able to try out circuits without much hassle now. RF is always an edge case that needs all sorts of special consideration.
@aioni77
@aioni77 8 күн бұрын
I really like music in your videos ❤ nice restorations again 😊
@R.Daneel
@R.Daneel 8 күн бұрын
@18:30 Always makes me think we're getting "Another Brick in the Wall". ;-)
@Silverfoxwolfen
@Silverfoxwolfen 8 күн бұрын
'Close enough', a true engineer :)
@malteibs6350
@malteibs6350 8 күн бұрын
Snipping off the weird mains plug is satisfying 😂
@malteibs6350
@malteibs6350 8 күн бұрын
You are really the master of switches! I'd never dare to open one...