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• 
  @WilliamLaakkonen2 күн бұрын

  That "Fluke" was actually built by the original Datron Crew- Fluke bought Datron some years ago. I worked for Datron in the 1980s.

• 
  @Mr_G27 күн бұрын

  X and Y capacitors are rated for AC RMS mains voltage, so, if you have 230 v AC, then 275 v capacitor is exactly right for this voltage. Some X/Y capacitors are even marked as 250 v, it means, that it is specifically designed to work in 220 - 230 voltage mains circuit (even if peak voltage at 230 v mains is around 320 v).

• 
  @Berk-lf6ge29 күн бұрын

  Really cool video. RF is a such a fascinatig field to study and you really know a lot! Please dont stop doing videos like this, they are super fun to watch and study

• 
  @MadawaskaObservatoryАй бұрын

  its too small. they should make it bigger!!!!!!!

• 
  @MadawaskaObservatoryАй бұрын

  i thought IEEE488 was dead. it should be.

• 
  @amirb715Ай бұрын

  15V out is for active probe power and that black wire to the mains for line trigger

• 
  @Plons0Nard2 ай бұрын

  I have the smaller version, the TDS2022. Within a year of purchase it broke down. Indeed the switcher. The heatsink was too small for the dissipated power. I modified it and now it has been fine for several years. Tektronics is no longer the sturdy brand it used to be. Cheers

• 
  @dragonlard45953 ай бұрын

  Does anyone know, where I can buy them nowadays? I cant find them anywhere.

• 
  @georgelivanes2832Ай бұрын

  I cant find them anywhere as well

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  @nurab-sal12764 ай бұрын

  It looks like a beautiful meter. Can you comment on if it is possible to do an ACV ratio measurement between the front and rear terminals? Many meters nowadays can do DCV ratio measurement, but for accurate measurements on amplifiers I want to know ACV ratio.

• 
  @IanScottJohnston4 ай бұрын

  I have a 3458A.....but would love a 8588A to join it and start some PPM wars between them!

• 
  @bansci4 ай бұрын

  I'd love a 3458A, it's the classic! I had the choice of course but managed to get a great deal on the fluke in the end. I think you need a calibrator next, or maybe a resistance and current mode on a PDVS3 maybe?

• 
  @chrisengland55234 ай бұрын

  43:00 in - "Ok, that's probably fixed it. Turn it on - any smoke?"

• 
  @petermikus23634 ай бұрын

  For me personally the HP/Agilient/keysight look much cooler and nicer altough it might not be as intuitive. Though the Fluke seems like a magnificent machine. Nonetheless i will never have or need imeither of them.

• 
  @xConundrumx5 ай бұрын

  Nope ... Just nope ... The non-standard spacing aside. Why oh Why when you have a massive screen like that is much of text just way to hard to read (poor fonts, font size, colors etc). Yes I know you can control it via LAN but come on. For that price ...

• 
  @bansci4 ай бұрын

  The interface is definitely a missed opportunity, especially how good the Keithley's are. Still, the specs on the fluke are out of this world...

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  @solodolo60185 ай бұрын

  Thank you very much for this video. Very informative. Theres an 8566b near me im thinking of picking up. It needs a new battery but i dont think thatll be a hard replacement. Luckily its a model that doesnt use the battery to store cal data from what ive read.

• 
  @poormanselectronicsbench20215 ай бұрын

  First off, great video! As far as the caps, any X/Y rated caps are made to fail by internally vaporizing the metallic surface on the internal foil ( Dave @ EEVblog took one apart and showed the damage process), and will also drop in capacitance as they do that. Using them in AC power / dropper circuits like that they commonly fail over time, but maybe using 2 larger value caps in series would delay that by lowering the stress on them. I would also consider replacing those multiple board mounted resistors with a chassis mounted one with a higher rating, or, at least standing off those resistors higher on the board and maybe putting a closely rated slow-blow fuse inline with them to use as a fail safe in case any thing like that happens again. Using a ICL component instead of resistors, along with a slow blow fuse might also work nicely, as the ICL would take stress off of the fuse until the relay bypassed it, and a closely rated fuse would also open and keep the ICL from cooking things.

• 
  @bansci4 ай бұрын

  Thanks for the thoughts, all great points!

• 
  @electrobert88745 ай бұрын

  The mercury battery is not a reference, but it is used as a floating offset correction

• 
  @bansci4 ай бұрын

  Thanks for this content! Do you have any more information about this somewhere?

• 
  @electrobert88744 ай бұрын

  In the schematic (page 41 of the user & service manual pdf) you can see that the battery is used as a floating offset source. It doesn't have a V-ref. Input voltage is chopper amplified and then showed on the analog meter.

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  @bansci4 ай бұрын

  @@electrobert8874Thanks I went back and watched my video again till I saw the schematic and it makes perfect sense! A nice stable (over short times) low-impedance voltage reference you can reverse to determine the offset voltage. Thanks for the correction!

• 
  @Samucas816 ай бұрын

  Hello, I need firmware for my hp 8594A, could you help me? Thanks.

• 
  @bansci4 ай бұрын

  Sorry, I don't have one of those units or the firmware...

• 
  @Samucas814 ай бұрын

  @@bansci Ok, no problem, tnks

• 
  @pedrorafaelechenique56546 ай бұрын

  Excuse me, could you tell me how you removed the front panel of the power meter?

• 
  @bansci4 ай бұрын

  I can't remember exactly how but it was a very painful process, I think the plastic clips over something meaning you have to flex it out, very nerve wracking when you have aged and brittle plastic!

• 
  @andymouse6 ай бұрын

  Awesome stuff ! just watched your initial unboxing and thoughts on the 8 1/2 digit fluke and now this one and I have subbed. Audio and metrology are 2 things I enjoy but I am very much the amateur (got to start somewhere !!) and enjoy your delivery of what you do. I am at the moment fascinated by Sinewaves and making low distortion sources and in particular Bulb Stabilised Wien Bridge Oscillators. I have a crappy sound card and have been using ARTA and REW software to find my feet, along side my Siglent's FFT which is only realy an indicator that things are improving ! anyhow great work I look forward to more stuff like this....cheers.

• 
  @bansci4 ай бұрын

  I think low-distortion-nuttery is just as addictive as volt-nuttery, or time-nuttery, except it's easy more expensive as you start chasing the hertz, and gigahertz... Save yourself!

• 
  @andymouse4 ай бұрын

  Lol ! but but but the sinewaves ? :)@@bansci

• 
  @rgosens27 ай бұрын

  30:20 Is that a twin PSU I spot there?

• 
  @bansci6 ай бұрын

  If you're talking about the PSU on the bench in the lower right, that's a donor PCB I got off eBay when I thought the issue might be with a switching transistor or some other part. I didn't think it would be a simple resistor failure but now I know better! If you mean the barrel jack in the back, that's a output for powering some other peripheral, I don't think it can be a power input.

• 
  @JAKOB19777 ай бұрын

  Alright mr big dog om campus.. thx for dropping the DMM-pants and making the rest of us feel inferior about our own precious digital multimeters. nahh :P but that is one very nice piece of testgear your have there...congrats with the heavy purchase... Is it still a nice relationship, here a year after the honeymoon phase?

• 
  @bansci6 ай бұрын

  So far so good, I haven't used as much as I thought. Other dmms like the DMM6500 and DMM7501 are just so much better for general experiments, but this does what it's supposed to do, which is be the last word in precision!

• 
  @erwe10547 ай бұрын

  прикольный балун для смесителя на отрезке коаксиала

• 
  @erwe10547 ай бұрын

  Ну наконец то хакнули этот tracking generator bg7tbl Оказалось дешевые массовые технологии внутри были обнаружены там. Чип ADF4350 позволил сделать маленький объем и упростить производство вместо громоздких умножителей частот. Хорошо было бы сравнить с Anritsu MH680A по характеристикам

• 
  @hobonickel8408 ай бұрын

  i can pick up one of these in units in great condition but without the charging cable for $200 is that worth it without the cable.. so it will cost me $400 to have a working unit with cable? Do you think a novice can set up a diy charge cable? I dont need it remotely was just going to use it as desktop

• 
  @bansci8 ай бұрын

  Hey, the units are well worth $200, but I only use it when I'm messing around with SMPS. I would recommend making your own charger to save money, you can shave down some barrel jacks to the right size, but it will take some iterations.

• 
  @rajeshsain35918 ай бұрын

  Hello sir.. I’m using MFC Model no: GESDA0045025BV020 argon gas flow controller. More variation coming during machine running. Can suggest what’s the issue in this Card. I have also checked ICs and resistors no any variation found their readings.

• 
  @bansci8 ай бұрын

  Your valve might need servicing, also check your upstream pressure, perhaps you have other things switching on the line affecting the pressure?

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  @rajeshsain35918 ай бұрын

  Sir ​​⁠@@banscithanks for support. I serviced the valve no any seal found in damaged condition then all cleaning done and fitted again also checked the line pressure found ok & other valves are working on same pressure. Now I found only fixed value 240.43 during startup. Can suggest how to resolve this issue. when I operate the valve by hmi no any gas flow increase shown on display. sir can I connect with you if possible on mail id or WhatsApp number.

• 
  @bansci8 ай бұрын

  @@rajeshsain3591 Hi, I'm sorry I'm not an expert in repairing these, and I can't offer support. It may be with the oscillation that you have bad PID settings, but if the flow rate is stuck now that's a new problem. Good luck!

• 
  @gerryjamesedwards12278 ай бұрын

  That envelope tip is golden! Great idea, and, like most great ideas, it seems obvious once you know it! Cheers, mate, subbed!

• 
  @carlosdanielmendozaperez69078 ай бұрын

  I think i found another great and promising Electronics Channel

• 
  @JohnUsp8 ай бұрын

  Impressive. Thanks.

• 
  @lumpyfishgravy9 ай бұрын

  Muldameder

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  @bansci8 ай бұрын

  Ouch!

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  @fichambawelby263210 ай бұрын

  👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏

• 
  @theinel Жыл бұрын

  The most common unsolved problem of MAS is when the sensor going bad, also capilary clodged, heater and temperature sensor problem. Then Trashed.

• 
  @jhyland87 Жыл бұрын

  Do you by any chance have the arduino code you used to interface with the mass air controllers? :-)

• 
  @bansci Жыл бұрын

  So the MFCs I've shown at the start of the video can be controlled using a python library (github.com/numat/mfc). I've also designed a analog control board, and the code is here for the arduino controller (gist.github.com/toastedcrumpets/3ee78ff61feda329bbbc7c1797fa876f), but I don't think that's what you want.

• 
  @jhyland87 Жыл бұрын

  @@bansci yeah I'm using arduino (trying to, anyways, lol. I suck at C/C++)

• 
  @bansci Жыл бұрын

  @@jhyland87 Ah OK, one day I hope to release a board for controlling analog MFCs via a web/wifi/BLE interface but I'm a long way off wrapping that project up! I got this far with it oshwlab.com/m.bannerman/banflow (its not WIFI but it does work!)

• 
  @jhyland87 Жыл бұрын

  @@bansci Very impressive, even without WIFI. I'm making a nitrogen generator, I know I don't actually need Arduino for that, but it's a great excuse for me to buy a bunch of neat stuff and finally learn how to code C/C++. Im a software engineer, but mostly web type stuff (lately it's been all NodeJS), so lower level languages like C++ are a bit foreign to me.

• 
  @bansci Жыл бұрын

  Ah cool project! I want one too, but I've not made it. Was planning to follow applied science kzread.info/dash/bejne/aYSLp7WQocuqaNY.html. What's your design?

• 
  @jhyland87 Жыл бұрын

  Very interesting video. Since you were talking about GCMS a lot, i have a quick question. I know the GC usually works off of a carrier gas (mobile phase), which means it needs positive pressure to push it through. Then the MS works by ionizing the pgas samples and sending the charged particles through a vacuum. Question is - how does the GC continously pass the samples off to the MS if one works off of positive pressure and the other works off of a vacuum?

• 
  @bansci Жыл бұрын

  Hi, so the MS is in a vacuum which is "leaky". The sample gas "leaks" into it continuously, and a vacuum system constantly removes this sample gas to maintain the vacuum. To introduce a sample gas, you just place it near the leak. All of the sample gas doesn't all need to go into the MS, so you flow the sample gas past the leak. The leak being a tiny hole stops too much gas entering (removing the vacuum). So with a GCMS, you have a high pressure at the start of the column, that drops down to more-or-less room pressure by the time it exits the column to the detector. If the detector is a MS, then it flows past a sample port for the MS before being released into the lab or into an extraction system. Hopefully this helps understand the pressures!

• 
  @theelmonk Жыл бұрын

  Very pleased to hear you acknowledge the problems with Dreamsource Labs' unacknowledged use of Sigrok's Pulseview.

• 
  @bansci Жыл бұрын

  Yeah, the device is great, very well made, but I didn't realise the issues around its software and this has sort of spoiled it for me. They're still releasing their own software and selling the devices though.

• 
  @SoonerRoadie Жыл бұрын

  Thanks for the video. What kind of platinum resistance thermometer are you using with the DMM6500?

• 
  @bansci Жыл бұрын

  Hey, can't remember exactly now. Something like one of these uk.rs-online.com/web/p/rtd-sensors/2364261 Definitely 4 wire PT100 and class B or better. Was the best I could buy on RS. No calibration certificate though and I did not anneal the thing or do anything special. Good enough for this job though!

• 
  @thetechgenie7374 Жыл бұрын

  Likely coincidence that that YIG/LO failed and not overloading the input? It is a common failure point with those older HP’s I seen over the years. They don’t take shock well, newer spectrum analyzers actually uses a shock pad screwed to cavity to help a absorb shock. I had to fix one that had a bad counter/divider as signal was free run pretty much. When buying test equipment from depots especially military equipment they get toss about, or even left outside and etc? So likely wasn’t anything you did to make it failed, it just likely failed due to age? I don’t think you killed it? It likely passed due to natural causes? If was a overloaded input the attenuator or mixer the first converter assy would have failed instead? So you were correct to suspect that, as would have assumed the same. Great video on a nice piece of gear.

• 
  @bussi7859 Жыл бұрын

  Flumsy and without Organisation

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  @TT-lf5hi Жыл бұрын

  Hi, did you know about the ability to hack this oscilloscope before you bought it? I find it hard to know what has hidden features when looking at old equipment and I don't think it is very feasible to spend hours and hours researching every tool that goes on auction, any tips on how to get learn about good equipment without the massive time investment?

• 
  @bansci Жыл бұрын

  I don't think there's any special trick, just only research equipment you want and you have a chance of buying. The chance bit is probably what you need to get right. I don't check eBay often as prices are high in the UK. But I keep an eye on the test equipment Google groups and check out their adverts, as usually prices are more reasonable so it's worth the effort. Same is also true for clearance auctions that sell company equipment, you can occasionally get amazing bargains but you must be careful not to get carried away

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  @donepearce Жыл бұрын

  Maths please, not Math. You are not American.

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  @ahamedraihan2438 Жыл бұрын

  The video is informative. How can I find out the default login IP for first time login? My MFC don't have any display. Its a mks GM50A series MFC. No default IP address found in the manual.

• 
  @bansci Жыл бұрын

  From the manual "The MKS IP Address format is 192.168.2.X, so the Host IP Address must be of the same format. A recommended Host IP address is 192.168.1.Y with a Subnet Mask of 255.255.252.0, where Y is some number between 5 and 254" This means you will need to scan the subnet 192.168.2.X for any http servers. You can do this using tools like NMap, or just try pinging all X=1 to X=254 values using a script. You could also try a broadcast ping, by pinging 192.168.2.255, this should cause all devices in the subnet to respond. Only the port scan is guaranteed to work though, some devices ignore pings.

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  @davidaz4933 Жыл бұрын

  The JFETs 2SJ74BL and 2SK170 notoriously unattainable That's the only reason I didn't build this awesome amp

• 
  @bansci Жыл бұрын

  diyaudiostore.com/collections/frontpage/products/matched-jfets?variant=39335247020105 Now you have no excuse :-P

• 
  @davidaz4933 Жыл бұрын

  @@bansci Thanks I am registered on the DIYAUDIO website many years I posted a lot of posts there about a DAC I built At the time they sold in the store they did not make deliveries to Israel I see they fixed it I checked now including shipping $47 I will later order a set from them I am currently more focused on the project of improvements to my spectrum analyzer R&S Looking for a good source for a 10 MHz rubidium reference I regret that I did not purchase it in the time that was on stock from a supplier tech mart in Israel for less than 50 dollars not working it very easy to fix them

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  @bansci Жыл бұрын

  @@davidaz4933 Ah you're in Israel? I always see excellent test equipment for sale from there on eBay, but the taxes and shipping are too much to the UK. Regarding frequency references, I really like BG7TBL's GPSDO, it has a second hand quality ovenized crystal in it, mine was a Trimble. He also does a frequency analyser too which seems well respected (called the FA2). The GPSDO needs to be left on, but I found it as good as my rubidium as far as I could test.

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  @transfunktionator Жыл бұрын

  Awesome Video, thanks!

• 
  @lambertax Жыл бұрын

  Are you using leaded solder? Because unleaded solder isn't fit for repair. You heat too much the pads with your unsoldering iron. That's why you killed the pad. Nice job to find the problem on the power supply, it was far from obvious. 👍

• 
  @bansci Жыл бұрын

  Thanks for the advice and support! I am using unleaded solder, I'll try to get some leaded for testing. I didn't think I'd over-heated the pad too much in this case, the contact time wasn't that long and you need to melt both sides well for the gun to do it's business but clearly results speak otherwise. In hindsight, I should have just clipped the resistor and pulled the leg through the other side without using the gun.

• 
  @mastertechlima1067 Жыл бұрын

  i have tds3032 white screen.no relay noise. i have found +-5v 3.3v. have any idea wheres the problem??

• 
  @bansci Жыл бұрын

  Sorry no, I'm not sure where the split rails are generated, but I'd check for shorts pulling the rail down using a thermal camera at first (because I have one), I'd check if the rail has high ripple perhaps indicating a capacitor problem. Unfortunately it's still wide open at this point!

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  @mohammadbastam6364 Жыл бұрын

  Really really cool! Can't wait to see the next version

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  @tomallen6073 Жыл бұрын

  Would this be good for an electrician?

• 
  @bansci Жыл бұрын

  Not really, won't fit in their pocket and is like taking a Lamborghini for the weekly shop!

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  @ernestb.2377 Жыл бұрын

  Interesting video to watch. Thanx 👍

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  @infolabtronix4649 Жыл бұрын

  Hello again, i have a TDS3014B, with Floppy Drive and would like make the firmware upgrade, but the firmware file that I have V4.41 is +/- 2,5Mbytes, so I dont know how a can divide the original file in to four floppy disks, like disc1, disc2, disc3, disc4..... Someone can explain me how I can do this process? I have a laptop with floppy drive and new formated and blank floppy disks.... Someone can help ? Many Thanks

• 
  @bansci Жыл бұрын

  I checked out the firmware file, its a zip with four folders each one labelled after a disk you need to copy it on to. I got the zip from here www.tek.com/en/support/software/firmware/tds3000-and-tds3000b-series-firmware-fv341

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  @xDevscom_EE Жыл бұрын

  Please, for metrology ppms love, do not use any alligator clips for precision measurements. Even simple bare copper wire out of UTP LAN cable would be much much better. 8588A equipped with proper 5-way binding posts, use it to the benefit to avoid banana stuff :) Also those crusty resistors have huge TCR. Your mercury worry is legit, so I'd use gloves for uncleaned resistors like that just to err on safe side.

• 
  @bansci Жыл бұрын

  Thanks, all excellent advice from the master himself! I was going for speed not accuracy for the video here, but I've been reading a bit more about what you suggest on this topic, the talk of metrology q-tips now makes sense in Marco Reps' videos now!

• 
  @scaryperson27 Жыл бұрын

  Very nice amp. What was the reason for the soft start over say two CL60's on the mains and transformer primaries? Must have more capacitance than typical.

• 
  @bansci Жыл бұрын

  Great question, I would say efficiency, but the amp is not very efficient anyway. I originally used it just because it was part of diyaudio's universal power supply design but given the trouble I've had something like a NTC solution is looking very attractive!