But when I buy something broken with intentions to repair it, it's complete disaster and unrepairable...
@EEVblog
7 жыл бұрын
Join the club.
@Tarbard
7 жыл бұрын
I bought a really old "broken" computer thinking it would be fun to repair, wasn't broken they just forced the memory card in the wrong way around. I was strangely disappointed.
@derkeksinator17
7 жыл бұрын
Can confirm, have an old 466 tek scope and the power supply blew and took half the mainboard with it.
@TheError404
7 жыл бұрын
or somebody tried to jam the connector the wrong way around and ripped the socket clean off while managing to short out the Vcc rail to something else, melting every power trace, destroying the mosfets along with switch mode controller which caused the 5V logic supply to become 20 volts for a while. Welcome to destination fucked
@esuohdica
7 жыл бұрын
Me too, every bloody time!
@Psychlist1972
7 жыл бұрын
"So, what do you test with your test equipment?" "I test test equipment with my test equipment." :)
@MaxKoschuh
7 жыл бұрын
Once upon a time, a gold digger came home after 5 years of hard work, with a tiny pocket full of gold. "What are you going to do with all that money?" "I will buy new tools for the next dig, which is starting tomorrow"
@A2000MHz
7 жыл бұрын
"With what do you calibrate your calibrator?" "I calibrate my calibrator with a calibrator calibrating calibrator!" :-P :)
@antoineroquentin2297
7 жыл бұрын
8842A ebay prices have gone up 300% after the video
@mcsniper77
5 жыл бұрын
Yeah you can't a broken shitty benchtop dmm for $100 at this point.
@_yonas
4 жыл бұрын
They still go for around 400USD on my local ebay...
@benni5541
4 жыл бұрын
@@_yonas well its not like they are still in production after 40 years so supply is near 0
@Narwaro
7 жыл бұрын
Everytime you make a video about some used gear you got a bargain on, I go to ebay and its like 300 bucks plus 250 shipping from the USA and I am like "yeeeeeah" in good ol' Europe
@ianmacdonald6350
7 жыл бұрын
I'd be wary of using switch cleaner on any high accuracy equipment (or radio gear) as it alters the dielectric constant of the switch contacts. Some switch cleaners can also damage front panel plastics over a period of time. Seen cases where a control has fallen off inside because its mountings have disintegrated a few months after switch cleaner was sprayed on it. This is certainly a concern on vintage gear if you want it to last. Have found that the best and safest thing to use (if you have to) is WD-40. Provided it's the genuine article, and not a ripoff of course. WD-40 was developed for use on the Atlas missile as a water dispersant (hence name) and a criterion was that it must not put electronics off-tune. Still keep it off soft plastics or rubber though.
@KerryWongBlog
7 жыл бұрын
One problem of these multimeters using VFDs is that the display are usually quite dim for used ones and replacement can be quite expensive. I personally like meters such as Keithley 196 or Keithley 192 which have crisp LED displays.
@EEVblog
7 жыл бұрын
Yeah, LED is better.
@zoefowler7002
7 жыл бұрын
An even better display technology are nixie tubes.
@MaxKoschuh
7 жыл бұрын
my Keysight 34450A has this weird OLED display that I completely felt in love with it
@cws-999
5 жыл бұрын
If you have GPIB interface... kzitem.info/news/bejne/0598m6l-f4dheoo
@TheDefpom
7 жыл бұрын
AC is a seperate PCB... there are two versions of the PCB, if it is the wrong one you need to change a couple of connections around on the PCB, I had to do that on one of the units I purchases (I have had a few of them), it is mentioned in one of the service manuals.
@kevin_6217
7 жыл бұрын
This has to be my favorite KZitem Channel. "Awwwhhh. *inhales*. The first thing I notice is the red silk screen, check this out. Awhhhaahh. Awhhhaahh! Look at that! Look at the red silk screen markers! Oh, that's sex-on-a-stick. Look at that...
@MaxKoschuh
7 жыл бұрын
yes, Dave is wonderful. Love his blog. *If you like true excitement, maybe check out the Beautiful-Electronics Blog
@EngineeringVignettes
7 жыл бұрын
You find one for a good price on EBay... then you look at the shipping cost. Pirates, the lot of them. - Eddy
@steve_case
7 жыл бұрын
Another good find is the 8840A/AF. Made for the USAF, I belive. It contains the option 09 AC TRMS converter and IEEE-488. Got mine for about $60 too. Specs are not quite as good as the 42, but a solid meter nonetheless. Great price on the 8842A!
@johnwest7993
2 жыл бұрын
I have one of the AF ones. I got it in return for repairing 3 other identical ones that the AF repair center said were not repairable. The repair tag on mine said they had replaced the IC that their troubleshooting chart said to replace, but it didn't fix it. So I looked at the indicated IC, (not hard to find as it was covered with solder flux,) and noted that it had been installed backwards. So with nothing to lose I just removed it, cleaned up everything and reinstalled it in the correct orientation. I'm still using it on my bench 25 years later.
@Pootycat8359
2 жыл бұрын
I just got a good deal, too---a Fluke 45 for $130 + tax, free shipping. I don't have the standards required to see if it meets specs, but as far as my Fluke 87III on 4 1/2 digits, can tell, it might.
@lawrencel3188
7 жыл бұрын
Another Fluke 45 user here. Might consider upgrading to this bigger brother Fluke.
@stevec5000
7 жыл бұрын
Dave there is something to repair, why not make the display bright again? They are only feeding 5 volts to it so 8 or 10 volts might do the trick. I found one of these cheap at Goodwill that has the AC option and it's a bit dim, not as bad as this one, but when it gets too dim I'm going to try boosting it up.
@kibi15
7 жыл бұрын
Nice meter. I got an 8840A a few years back. It has a busted transformer. I ended up winding my own as a replacement.
@leppie
7 жыл бұрын
And suddenly broken ones sky-rocket to $300 :D
@duanethompson2360
4 жыл бұрын
Thanks, just picked one up on eBay for $45, because of error 30. It has the option 5 just no option 9. Everything thing else is good! Thanks
@BiecherBender
7 жыл бұрын
eBay price in Germany 250 to 300€
@TheFrostEngel
7 жыл бұрын
J Bender mehhhh hier in DE mal wieder zu teuer :(
@Foozlebop
7 жыл бұрын
J Benders eBay price for two 2016 calibrated 8840As in the US? 130 shipped!
@MaxKoschuh
7 жыл бұрын
yes, I guess all the cheaper ones were sold right after this video came out
@mx0r
7 жыл бұрын
everything is expensive in germany; somehow got used to it... :-|
@GlennPierce
7 жыл бұрын
Yeah UK stuff is the same. Even the broken stuff is really expensive. I wonder why ?
@GermanToolReviews
7 жыл бұрын
Nice Find! I notice that a lot of ebay sellers mark things 'For Parts or Not Working' so they can sell it as is no returns even if it actually works. It also costs money for them to properly test it.
@sparkplug1018
7 жыл бұрын
Between the time and effort to test things, and the way that eBay shafts the seller if someone complains, its not terribly surprising that people are doing that.
@Dratchev241
7 жыл бұрын
the very few things i have sold on scambay I have listed as parts/not working even if the thing worked 100% way too many people who want to scam people these days
@novano1d
7 жыл бұрын
But you don't have to list it as parts or not working just to disable returns, though.
@sparkplug1018
7 жыл бұрын
+Novanoid Sadly in a lot of cases even if you disabled returns, listed in the description as an as-is sale, eBay can still side with the buyer. And just give them their money back.
@novano1d
7 жыл бұрын
Ah, okay.
@Tarbard
7 жыл бұрын
I liked the big readable display on that keysight multimeter so I looked up the price out of curiosity, £2600 :-O
@phillyphakename1255
8 ай бұрын
Those front/rear selector buttons are notorious for getting oxidized contacts, creating issues. We get a few loads every year that need them replaced. A 2 dollar part fixes it, dont try to clean the contacts. At least I was getting paid when I learned that lesson...
@allesklarklaus147
7 жыл бұрын
I got an 8842A from 1993 and a 8840A from 1997. The older 42A has the old Motorola SCA623 (?) reference and the 40A has the LTFLU1. Both are probably the best unheated references. After all these years both meters deviate 0 to just 1 LSD from each other and they seem to never have been adjusted (cal stickers are old and okay). Which is impressive since the references should usually drift in different directions, at least thats what I read.
@packratswhatif.3990
6 жыл бұрын
alles klar klaus *6
@Jeroen74
7 жыл бұрын
I had hoped you mention the input impedance of >10GΩ for the 20mV to 20V ranges, and 10MΩ for 200V and 1000V range.
@QLTD
7 жыл бұрын
1:22 was the voltage set to 100V when you switched it on???!!
@QLTD
7 жыл бұрын
Oh! I got it the drawing shows the opposite! I thought the white in the drawings represent the white in the switches!! It is confusing! BAD DESIGN!! >:-(
@diggleboy
4 жыл бұрын
This is one of my trusted favourites! I miss the auto calibration and ranging clicking of the relays inside. A workhorse with simple calibration steps for the DIY.
@diggleboy
4 жыл бұрын
I use this from 1997 - 1998. It also had a very high quality A/D converter for its accuracy including a precision reference voltage.
@christopherbartleson8918
4 жыл бұрын
How does the Fluke 8840a compare to this Fluke 8842a?
@aloneinanearthship4010
5 жыл бұрын
What's the difference between the 8842 and the 8840?
@radioengineering8247
5 жыл бұрын
Yep - $100 or so to buy one on eBay but then three or four times that in shipping to get the thing here (NZ). I have an 8840A with a dead display. They are very susceptible to damage if these units are dropped.
@mediamonster4936
4 жыл бұрын
How about a Fluke 8040A? How does it compare?
@JoshuasRecordings
7 жыл бұрын
I got two of these from the dump. Love these little meters! The VFD display is really awesome, at least I think so!
@DAVIDGREGORYKERR
7 жыл бұрын
You going to be wanting that extra user installable module.
@Petex90
7 жыл бұрын
And all cheap Fluke's are gone for a while after this video is released.. :D
@cvetomircvetkov5670
4 жыл бұрын
I own one of these. It measures a voltage and after disconmecting the leads the display still displays a number around the measured value and only when the leads are shortened the display goes to nill. Is this behaviour normal for this multimeter?
@TheOnlyPsycho
7 жыл бұрын
And now that you have posted this, the price is gonna skyrocket, thanks Dave!!! :-P
@rozendam
7 жыл бұрын
And as a gift you get a huge input impedance at the range of up to 20 V.
@michaelparker2449
7 жыл бұрын
The cheapest working model I can find on ebay is over £200.
@bjtaudio
6 жыл бұрын
Fluke 8842A are listed at $350~450 nothing on ebay at $100, and the meters are scratched worn and broken..All the new 5.5 digit flukes meters cost thousands and have basic DCV accuracy at 0.015% not the amazing 0.003%
@TOMKATPEDALS
7 жыл бұрын
Just scored one of these on eBay for $100 cause the listing was mislabeled
@mikedrz
7 жыл бұрын
Every time Dave recommends something, the prices seem to jump by 200%. He could recommend turd sandwiches, and they'd also triple in value. lol
@EdwindeJong0
7 жыл бұрын
I'm sure the red silk screen on green looks fantastic for non-color-blind folks, but it is completely unreadable for those with deuteranopia. Reading resistors is hard enough for us color-blind people as it is, please don't use red silk-screen and help us 3% of the population.
@MaxKoschuh
7 жыл бұрын
interesting point
@dcfoster83
7 жыл бұрын
Haha, I am red-green color deficient as well, I was just thinking exactly the same thing when I watched the video!
@Heathcliff_hensel
7 жыл бұрын
Edwin de Jong I'm also red/green colorblind, I wish LED manufacturers would get rid of the common red/green LED's found in consumer electronics and switch to red/blue or something like that. It would sure make my life easier.
@EdwindeJong0
7 жыл бұрын
I grew up playing a synthesizer that had a red-green blinking led. I had never noticed the difference until a friend of mine asked what the different colours meant.
@HainjeDAF
7 жыл бұрын
I have an option 9 board for this meter lying around.
@JonathanHerrera_Bass
6 жыл бұрын
Long time, I know. Still have this?
@seanhornibrook
7 жыл бұрын
Just picked up my first oscilloscope... REALLY nice Hitachi V-422 fully calibrated for $125 US. Super nice screen image. Thanks for these videos pointing the right directions... :)
@fakenews7266
7 жыл бұрын
Hey Dave have you given away the Rohde & Schwarz RTB2004 Oscilloscope ?
@waltschannel7465
7 жыл бұрын
Great video. I live in Fluke's home town, for 50 years and STILL DON'T OWN ONE! Makes me a bit of a pariah, 😂😂😂
@tonys8108
7 жыл бұрын
A few years back I got 6 of these Fluke 8042's with the gpib and ac option boards.. Only one was beyond economical repair. A solid lab-grade meter
@jaredkusner1137
7 жыл бұрын
I purchased an 8840A on ebay for $71.- , with free shipping. It works beautifully. An asset to my radio shop for sure. Thanks for another great video.
@MatthewSuffidy
7 жыл бұрын
Finding that was quite a fluke.
@EngineeringVignettes
7 жыл бұрын
Waaa Waaa Waaa....
@acalthu
7 жыл бұрын
If you don't want it, send it to me. I love old Fluke stuff but they're hard to come by in my country.
@QbidMusicandMore
7 жыл бұрын
Almost making me nostalgic. When I was in school we used these in the labs.
@v8snail
7 жыл бұрын
Plus the customary eleventy hundred & seven AUD delivery from the US. . .
@SimoWill75
7 жыл бұрын
Please do the 5450A cal video using the wekomm, sounds interesting.
@xDevscom_EE
7 жыл бұрын
Crap, I need to buy one now, as since this video, 8842A prices on evilBay will now rocket into space. These 8842A indeed have reference better than many 6.5digit meters :) Actually same reference as 24000$ 8.5digit Fluke 8508A or 30K$ Fluke 5520A ;)
@jenniferw8963
Жыл бұрын
I wish the IEEE GPIB connector was RS-232 instead. I have no idea how I'd adapte that to R$-232 for controlling the meter from my arduino :)
@SidneyCritic
7 жыл бұрын
When you make $ on the video($400) and not the reselling price of a repaired unit($100), the "beyond reasonable repair" price it a lot higher. You could spend another $100 and still be way ahead, rather than not making a video and selling the repaired unit.
@AriannaEuryaleMusic
3 жыл бұрын
I found exactly one of these exact model at my local flea market, and I didn´t buy it, and that´s why Im watching this video, (to know more about it) Now I know that I will buy it next sunday...
@zo-lee3140
4 жыл бұрын
If you want to repair one I have an 8840A just went wrong, you can borrow it ;-) Otherwise, I have to buy a 121GW instead.
@Matlalcueitl
7 жыл бұрын
$70+ shipping if you live in Europe.
@GeoffEspeland
3 жыл бұрын
Are the 09 AC options interchangeable between an 8840A and an 8842A? Thanks
@rodrigomeldola6538
3 жыл бұрын
7:42 It was at full volume, I told my family that I was watching porn for engineers...
@XtianApi
11 ай бұрын
In the US, I'm seeing 300 and up. Maybe that's because of this video
@Sam-th4jl
7 жыл бұрын
the title of this video is a great pun
@WisdomVendor1
7 жыл бұрын
Dave, why the fuck go to ebay to get this?? seems you have a magical dumpster you have just taken it from.
@RBSVader
4 жыл бұрын
Not very cheap on ebay. But...it's nice. Maybe i should get one.
@ianide2480
7 жыл бұрын
Big rod fanboy... Dave, Dave, Dave, smh
@stargazer7644
7 жыл бұрын
There's one on ebay now for only $899, Buy It Now. lol :)
@ergunguler3981
2 жыл бұрын
Hello. What are you think about hantek hdm3065?
@NickyNiclas
7 жыл бұрын
Well the price is skyrocketing now lol
@pinterelectric
7 жыл бұрын
Now the price will double!
@stergeon8272
6 жыл бұрын
PSA: If you pick one of these up with a dim or dead display, it might be cold solder joints on the transformer taps. This solved dim display for some people, and in my case solved what I thought was a dead display. Great meter!
@Ziferten
2 жыл бұрын
This is also a problem on its predecessor, the 8840A!
@florianhofmann7553
2 жыл бұрын
Send it back complaining that it is working and not as described!
@TheDefpom
7 жыл бұрын
Yeah, I was right, 8842A !
@kostaskritsilas2681
6 жыл бұрын
The Fluke 8840/8842s are great bench meters. If you aren't hung up on brands, younmay want to look up the Philips PM2525/2535s, and the HP/Agilent 3478/3478As. They both have LCD readouts, and should be in the same class as the Flukes. I don't remember the accuracy specs off the top of my head. I know the HP/Agilent is closed case calibration.
@richardgoebel226
7 жыл бұрын
Nice find but what about the missing stuff on the back where the holes are? Are you going to get the -09 board to get this fully operational?
@EEVblog
7 жыл бұрын
Nah, I have no real need.
@ThomasHaberkorn
7 жыл бұрын
Best bargain quality LCR meter?
@lukejohnson5247
7 жыл бұрын
EEVblog - Hi Dave. Is it possible for you to do a 'solar panel road' style breakdown of the battery packs on NASA's luna/Mars rovers. The is much conjecture floating about regarding NASA's stated battery life and power capacity on a robot whose lithium ion battery is only half the size of a car battery; especially when compared to an 800kg Prius battery pack that's only good for 200k (or 4 hrs - or something like that). It's to complicated for a simple sparky, as there are solar charging and photon loads to take into consideration. The thesis being 'Is NASA's stated battery life BULLSHIT?', I'm sure it would make a great vid... + the conspiracy nuts will go apeshit over it.
@PlasmaHH
7 жыл бұрын
Hm, 275 for a broken unit here... or ~80 for a used working one, but 380 bucks delivery from the US, what the fedex? Also if the manual has the schematics, maybe one can hack together their own AC board...
@BobSolimeno
7 жыл бұрын
I picked up one of these on ebay last week after seeing this video and interestingly my unit does NOT have the LT FLU-1 voltage reference, but instead is marked with the Motorola logo and has the following part number: SZA 2638 K8850. I could not find anything online about this part and I'm curious if anyone knows anything about i relative to the LT FLU-1. Meanwhile, this unit of mine does not power up, and there was a hand written note adhered to the Z8 microcontroller chip indicating it was no good. So I have lots to sort out!
@brucestarr4438
4 жыл бұрын
Thank you, I just bought one, same thing, for parts AC not working, even has a calibration sticker... Error 30 and the pic of the back shows it never had the AC circuit installed at all... Not going to tell the seller his mistake, until it is in my hands.
@richfiles
7 жыл бұрын
I used to use a Fluke calibrator as a function gen for tuning resolvers on a brushless motor meant to operate the control surfaces of a refueling jet's boom. The precision was just a joy, compared to trying to get accurate repeatability with a function gen with dials... Probably could have requested a digital FG, but that calibrator was perfect though!
@jimhatch14
7 жыл бұрын
got my 8842a. with expected gpib interface. I was always just out of touch with 80's equipment, wanting to use my c64 on gpib. bought this to play with gpib, and it had the true rms ac board! I'm into hifi content creating, broadcast hifi nuts and normal people. On my dc calibrator, and as things warm up getting better all the time! true rms reference is important to me in my audio career as a contract tv radio broadcast engineer.
@RolandElliottFirstG
5 жыл бұрын
Postage is over 100 dollars, something has to be done about local and international post prices. Seems crazy that it has no AC Ranges standard out of box, this does not seem right, must be another setting perhaps.
@rossrobotics6342
5 жыл бұрын
Just scored one of these for $58 on Ebay. It has the fading display, but pretty sure I can repair it. Might make a repair video.
@gregswartz8924
7 жыл бұрын
A meter you have, (the HP 3468) I have as well. I do not use it as often as you, but are there areas where you find it unsatisfactory?
@charleslane2735
4 жыл бұрын
If I send you my meter,can you calibrate it for me?
@SootySweep22
4 жыл бұрын
Oh, Dave. Functionalality?! Function. Function is the word.
@laser-on-off
7 жыл бұрын
You turned it on before taking it apart !
@sl06bhytmar
7 жыл бұрын
bought one for 140€ from Finland... calibrated 2014, so probably going to be fine for long time.
@mlynch001
6 жыл бұрын
You covered everything well, and this is why there are FLUKE meters and then everything else. Built like old Tektronix scopes.
@gtb81.
7 жыл бұрын
add the ac module please
@llhand
7 жыл бұрын
Yup. When I got my "for parts or repair" fluke on ebay, I opened it up, plugged in the daughter card correctly, and it worked. Not bad for twelve dollars.
@Wes8761
4 жыл бұрын
So measuring AC is an option? Jesus..
@evanpapp93
7 жыл бұрын
I still use these, yes we still have 5, everyday! They have been banging around on calibration carts for more than 10 years! Very rugged units.
@PapaWheelie1
7 жыл бұрын
Have you had a look at any Tektronix scopes?
@PapaWheelie1
7 жыл бұрын
The 1705a was what I used for years to find satellites- nothing at any price can replace its accuracy even today
@rogert151
6 жыл бұрын
Anyone know where to get a 10M replacement divider network for these ?
@drabara
7 жыл бұрын
No cheap ones on Ebay europe, starting from 290 euro's
@Sahko123
7 жыл бұрын
You should look for a schematic of the AC measurement module and hack it in that would be an excellent video to watch
@Liwayputi
7 жыл бұрын
These are wonderful benchtop meters. A common reoccurring issue with these is the input connectors. They tend to oxidize and mess up the low ohms and mV measurements. In the cal lab, we just pull out the connectors, clean, then solder to fix the problem. You then have to readjust the calibration.
@leonardbutcher8555
7 жыл бұрын
Why is it so cheap in Aus, over here in the good old UK, its over £300
@AxelWerner
7 жыл бұрын
How to fix the Display?? Is there a Led replacement?
@zx8401ztv
7 жыл бұрын
Hmm nice old fluke dave, worth getting the true rms pcb :-)
@BIgGuidojoe
7 жыл бұрын
i got a fluke 45, i think its the little brother to that meter. its great for what i need it for. can never go wrong with fluke
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