EEVblog

Another ebay score.
Dave tears down a HP4263A LCR Meter.
How an LCR Meter works: • EEVblog #38 - LCR Mete...
Forum: www.eevblog.com/forum/blog/eev...
4263A Datasheet:
www.testequipmenthq.com/datash...
4263A User Manual:
literature.cdn.keysight.com/li...
4263B service manual: www.doe.carleton.ca/~nagui/lab...
X28C64 EEPROM: pdf.datasheetcatalog.com/datas...
82C54 Programmable Interval Timer www.intersil.com/content/dam/I...
Precision DiFET opamp
OPA627 www.ti.com/lit/ds/symlink/opa6...
List of Keysight part numbers: literature.cdn.keysight.com/li...
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[@MrCarlsonsLab]

Great review Dave! Two thumbs up....unfortunately only one counts :^)

[@electronicsNmore]

I'll take the dust over corrosion any day of the week. :-) That device was probably sitting on a shelf for 20+ years, which would explain all the dust. The only bad thing is the dust acts like an insulator not allowing the components to cool properly.

[@douro20]

One of the nicest LCR meters I've ever seen is an ESI Videobridge. It has a monochrome CRT display and has functions you don't seen even on more modern units. It will do all the basic things a regular LCR meter will do, plus perform ESR testing, data logging, and analysis of circuit impedance along three thousand frequency points between 20Hz and 20kHz. It can even be configured for parallel measurement.

[@leisergeist]

For some reason I just love the front panels on all the 90s-era meters/supplies/etc

[@Lskaggs63]

Remember it well, worked on the rack mount model back in the late 1980's!

[@huynguyentuan3745]

Excellent tutorial, Sir!

[@doriphor]

1820-1741 seems to be an arithmetic cpu, from what I read they used them in HP branded calculators as well (21, 22, 25, 25C, 29C).

[@huseyinavci356]

Well done !

[@blayral]

Dave, I always have a brush at hand for dust in the case either I'm out of air spray or the later is uneffective.

[@Diggnuts]

So if you hook this up to some computer you could read out all or most of the measurements and calculators at once and program that to show and alert values that are out of bounds? Would be interesting to see how one would implement such a unit for small production run use.

[@famillePuces]

Hi Dave , nice tear down. Hey I have a question.. what is the meaning of the arrows behind some blocks of the block diagram? Does it mean it is analog?

[@IsettasRock]

Rig up some LEDs to backlight that display so it's easier on the eyes. Some retro green ones would fit in nicely!

[@error079]

How about a review of the Agilent U1733C?! Long overdue!

[@Vogtinator]

I wonder what the device says if you connect an LC circuit to it.

[@call5sam]

great video. how about reviewing a Sencore LC 53 LCR meter?

[@eriklextro8223]

Famtastic teardown; Hello Dave, I have problems to add. Of all the characters you are in diplay in total? ; 40x2?

[@sugarbooty]

Nice! I could use one like this, nice score!

[@xchying]

for your cable did you just short Lpot with Lcur or Lpot with Hpot?

[@llionstephen8224]

What is the difference of LCR meter reading with open correction vs. open AND short corrections?

[@sanjuuyonsai]

13:30 "Source Resistoror"

[@FoxMccloud42]

instead of airdust spray you could buy a cheap airbrush compressor. they quite and don't push to much air out.

[@drkastenbrot]

Damn i would have needed this because a regulator inductor on my video tx broke...

[@PlasmaHH]

No air cans? Time to build an air compressor with storage tank and all kinds of electronics gadgets ;) (Or be boring and buy a big soft conductive brush)... Did you have a look at what voltages the dc/dc provides and what they are used for? For me it looks like something introduced late in the design phase... "oh we have the base board ready but someone we can't get around needing another voltage for this one special asic on that other board" "ok, just whack in a dc/dc, dont want to respin the base board with the power supply section"

[@AB-yu2tj]

sorry to hear eevblog is down due to the fires in the server...I've come across a lot of helpful folks there. wow below $200, have you seen the prices now? Option 001 is mainly the transformer measurement...etc. under measurement mode you would see 8 pages instead of 6 pgs when you have option 001.. Just got mine, about $300. When I leave it trigger internal which is the same as auto numbers jump around too much and all measurement are less than what is marked on the caps. wondering why it's like that. I will take any input please. thanks

[@allesklarklaus147]

currently only one of these on ebay: 1200 euros - buy now... (in germany) australia seems to be really cheap on professionell gear :D

[@robbieaussievic]

Dave, why don't you have a compressor out in the bunker (with ear protection & Safety glasses) unless the motor noise is an issue with neighbours ? P.S. the case of that unit must have been removed for several years, or it's been stored in a camels eyelid for twenty years.

[@kevinhayden8558]

Hi Dave... Did you ever hear of a Jinko 2616c lcr meter?

[@Stormy_9-3]

What are the two things at the top right?@5:34

[@gmcjetpilot]

EEV blog: What LCR meter, bench or handheld? The Agilent you have is about $400, used classic bench models under $200 on up. No-name brand $80....Thoughts. I have a bunch of great older HP test gear, but those SPECIAL components scare me. If they go you are going to have a hard time finding a replacement.

[@aajpeter]

Going for $1k now, b model is $1.5k. what's the 0.1% under $200 alternative now?

[@1videoshow]

Dave terminology: Where is "gonski" ;) its actually an education program in Australia ?

[@elboa8]

Hi Dave. Was there never a back light on this unit?

[@FixedUntilBroken]

To answer that, no it doesn't have a backlight...I know you're question is from 6 years ago lol

[@Redmoonblade]

Antistatic coth?

[@zx8401ztv]

A very powerfull bit of kit, but your handheld meter is far quicker and plenty accurate enough for most uses. The hp looks a pain in the arse to use.

[@edcammarata6430]

I have PC boards from a 4262A the test pins appear To be gold, does anyone know?

[@flemish4]

Wouldn't a phase angle with a magnitude of >90 suggest a negative resistance..?

[@dhrosa14]

flemish4 Yes. That can happen if you plug in a powered device, like a battery. If you hook up a 1.5V battery with an ESR of 1 ohm to the meter, and the meter tests with a voltage of 1.4V, it will measure -100mA flowing into the device, and hence a resistance of -14 ohms.

[@flemish4]

Thanks, that makes sense

[@Daveyk021]

Didn’t show if the “A” did ESR.

[@kristhetrader5029]

MATE, good review, you need an air compressor!!!!!!!!!!!!!!!!!

[@EEVblog]

Kris TheTrader An air compressor is not practical in my circumstances. I have to dust on the outside stairwell of the building.

[@JustinAlexanderBell]

EEVblog They make very small and lightweight oil-less compressors that would be perfect for this use.

[@MrBuck295]

EEVblog Maybe a compressor and a portable tank ,so you can fill the tank and take it where ever

[@EveOnlineRanger002]

Justin Bell are you talking about the ones for model air brush?

[@MrBuck295]

Eric Kerensky size of the compressor don`t matter ,but I have one of those portable tanks sold for inflating your car tire ,took the fitting off and replaced it with an air gun nozzle and regulator ,I can fill tank and go spray my hearts content, after tank is full no power source needed

[@richcollins513]

Replace the 2 large caps ASAP

[@jeales895]

"Resistoror"@13:35

[@kainhall]

hey! one thing i have always wondered about is how PC power supply's can sense if they are feed 110 or 220. back in the day, and still on cheaper units..... you have the red swtich. but my corsair hx 850 is able to switch on the fly from 110 to 220. or 120 to 240, and 50 or 60 hertz. its able to run on like 100 to 270 volts and 40 to 70 hertz or something like that.... yet still deliver 850w. HOW! mainly.... how does it sense, and how does it switch for voltag.e

[@jaaasgoed]

***** The mains frequency isn't really important, because the supply has a rectifier in it and runs on DC. The compensation for the difference in input voltage is done by changing the duty cycle and/or the frequency of the switching converter. That's it on a very basic level anyway.

[@slademcthornbody9060]

***** The power supply rectifies the mains and then feeds it through a switching transformer which is switched at duty cycle which is servo'd to maintain stable output rails at the required 3.3, 5, 12v etc regardless of load. The servo controller does what ever is needed to maintain the required output voltage. Because 100-270 is much higher than the output, it really doesn't care what voltage or frequency is on the input within reason (and component ratings). If the input voltage is lower, it will increase the switching duty cycle to compensate and therefore draw more current. Some supplies will also have a PFC circuit to draw a sinusoidal input current, but that is another story...

[@mrlazda]

***** New power supplies don't switch between input voltages, they are universal input voltage 85 - 264 Vac input range (100 - 240 Vac nominal). Old ones that had switch for 110V used voltage doubler circuit (diodes and capacitors on 110V position worked as voltage doubler and on 220V as full wave rectifier), basically old ones was designed to work width 220V AC input, and universal ones are designed to work with 100V input (this is not totally correct, but it can be looked that way) and only difference is in turns ratio on transformer (both keep output voltage stability by adjusting duty cycle).

[@darrenjacobson7456]

So really this thing is an impedence meter with an inbuilt calculator?

[@EEVblog]

Darren Jacobson That's all any such LCR meter is, yep. The magic of math.

[@Michalmas64]

Darren Jacobson Yes, some more details here: cp.literature.agilent.com/litweb/pdf/5950-3000.pdf

[@ericksonengineering7011]

Law of dirt: Dirt cannot be created nor destroyed, just moved from place to place. I like to brush and vacuum dust away when cleaning old electronics. Keeps my lab cleaner than forced air. I just use a junky paint brush. Cheers!

[@KingNast]

Can I donate an air compressor??

[@andycristea]

send it for the mailbag! :D

[@ttoo3000]

Have you got yourself a trade account at jaycar yet? you could quite easily get one. if you don't let me know.

[@EEVblog]

Tom Merry I had ones in the past but they keep cancelling it.

[@ttoo3000]

Strange, I'll have a look into it.

[@yaosio]

Get a data vac, works better than an air duster and never runs out.

[@EEVblog]

Real Name An electric duster is of no use in my lab, the dust would go everywhere. When I air dust stuff I go to the outside stairwell to do it. No power out there.

[@kevincozens6837]

EEVblog An electric duster combined with a vacuum cleaner would do the trick.

[@MichelSatoer]

"This is a HP yes, none of this Agilent or Keysight rubbish" Is Agilent rubbish? I thought it was a well respected brand?

[@VaughnRhinehart]

Agilent is not rubbish, Dave was being sarcastic. If you watch other of his videos, he often calls superior tech rubbish in mockery of the viewpoint of the designers of the device he is showing.

[@twocvbloke]

Get a vacuum cleaner that has an exhaust port to attach a hose to with a blower nozzle on the other end and the regular vac hose you can hold nearby to suck up the dust, saves buying that blowjob-in-a-can stuff all the time... :P

[@bskull3232]

asahi kasei=AKM

[@deanfrees1027]

Let me know if you need any test gear www.valuetronics.com

[@antennabrain5439]

you need an A Brain for that

[@AB-yu2tj]

Common tell us the truth how much you paid for it

[@ijacobs333]

Third :D

[@aaronlaubenthal4191]

First comment

[@Shambler101]

aaron laubenthal who cares