Hi DiodeGoneWild, i know that there is like 1% chance to see my comment but, all i want to say is that your videos are amazing, i'm watching them everytime i have some time to spare but, all i want to say is that i don't want for you to leave this platform any time soon because you're doing some great things and for me, it's always a pleasure to watch.
Hi Diode I would appeal to the power of the Internet and Patreons to obtain a suitable rectifier either from NOS or salvaged from another meter to finish this restoration completely and in style. Thanks for the video and sharing your very vast knowledge!
In some long, almost forgotten time. A craftsman finished building this precision lab equipment. He proudly stamped his seal in the security screw wax well. And put the meter up for sale. Many decades later we all present watch in awe as DGW diagnoses repairs and educates. :)
I'm following Louis rossman and right to repair law n stuff. And by looking at the details companies provide to repair their products back then it made me giggle how repairing was appreciated and promoted by companies. And now we have to fight for it.
Worked as an Electrician for U.S. Corporation, in heavy industry. Though the accuracy of my digital multimeter wasn't an issue, since we often used Testers to see if voltage was there, LEDs for 120, 240, 277, 480, etc., so the Multimeter being off a little didn't matter in my case, but one year I misunderstood the notice about the meter calibration contractor being at work and submitted my meter with the meters from other employees in my department. Many of us make the mistake of thinking Digital Meters are showing the correct voltages. Though likely you're aware of your own equipment calibration, it occurred to me the analog meter might be closer to the values than you think. I'm not suggesting analog vs digital, I am though saying an uncalibrated digital cannot be entirely trusted. I watched the contractor use a calibrated test set to verify the readings on a few meters. I don't think he calibrated the meters, but meters that passed the test had a calibration sticker placed on them. Calibrated meters were used by employees that tested and set-up Protective Relays for Overcurrent (Timed and Instantaneous), Undervoltage, Phase Reversal (that one wasn't normally a problem), Variable Frequency Drives, etc., and another set of employees that calibrated 4 to 20 milliamp Process Flow Controls, and a host of other things I'm not familiar with. Great shows all, keep up the great work.
ah man that was class!!! just loved that.. and I learned so much on how a meter works, never watched anything on how meters work before... and Im glad to of seen this!!! and id say that wasn't a cheap meter when it 1st came out!!!
I recall that some old analog meters mentioned a method of calibration which utilized adjustment of a MAGNETIC SHUNT on the movement. The magnet was made stronger than needed and then there was a leakage path mounted between the two poles. Moving the added pole pieces closer to each other shunted some of the magnetic field, thereby reducing the field through the moving coil. That reduced the meter deflection. I have personally never done this kind of adjustment, but the idea has stuck in my mind.
Interesting as usual. That owners manual is basically a treatise on how to build an analog multimeter. The brake fluid tester is just going to give some indication of water content.
Hi, Tx again for yet another interesting video. Yes back in the 50’s materials were expensive and labour was cheap. In the west and probably even more so in Eastern Europe. So repairing such a device must have made sense. Nowadays we would call it sustainable. And that also makes sense 😄 Nice restoration with respect for its history.
Have a analog meter protek A800 which also had lost some accuracy but all it was required is calibration on the trimmers, it is a modern version. This model is another story and restauration was a pleasure to see, but hard to made .... Thanks for the video.
What is the voltage drop of the copper oxide rectifier? Can't it be replaced with even a schottkey or germanim diode bridge made from 4 descrete diodes? Ive never heard of a copper oxide rectifier before.
Great video! Wild hunch - From what I hear, you might be able to revive that rectifier with a little use, or replace it with either silicon schottky signal diodes or perhaps germanium diodes. They are said to have similar non-linear characteristics.
If someone wants to get something like that - there are meters like that with 0.03 V range, these have a hand hanged with a wire, not a bearing. However, they are all worth some effort, much handwork went into these meters in the day. I got an old EAV, it has its role on the bench, you just "see more" using a meter with a hand.
I don't think it's because they were expensive. That's the modern way of thinking. Back in the day it was all about availability. If the Communist Party has decreed that X amount of multimeters and Y amount of multimeter spare parts should be produced-that's what you're stuck with. If later it turns out Y was too small-well, you're out of luck. It may be another 10 or 20 years before the decision to increase the production of Y clears the bureaucratic chain of command. So you blew your analog current meter and want to buy some spare parts? No you can't-the industry simply doesn't make enough of them. You'll have to roll your own, i.e. rewind the copper windings, and dip it in resin. Can you buy the copper wire and the resin? Of course not: the Communist Party has decided that the general public shouldn't need this stuff, so it isn't for sale to the public. You'll need to steal some wire from your factory (if you work at a factory), or buy it on the black market from somebody who stole it from their factory. Both of you can go to prison for it-and not for stealing, but rather for the crime of "private sale and purchase of goods." All that just to obtain some bloody copper wire! Ah, the joys of Socialism and the planned economy.
well, it can be interesting to see whats inside the rectifier, I did not see this type anywhere inside of old school electronics.. I guess this one can be KUPROX maybe, cheaper than selenium
1% sounds very good for d.c readings, i imagine if it was used for repairing valve radios it would be way more accurate than it needed to be :-D. Did that site state the full scale deflection current for the meter movement?, i would have wanted to check the meter before touching anything. Shame that the rectifier is special :-(
Bruce Nitroxpro - but the principles would be the same, so the same arrangement of resistors would be required. That is resistors in parallel (shunt resistors) for the current ranges. And series / voltage divider (multiplier resistors) for the voltage ranges. The AC ranges are more tricky, because the characteristics of the diodes affects the needle position, and hence scale range markings on the plate are designed for the particular type of diode used. So changing this or redesigning this part of the circuitry to match up with the existing scale is not really worthwhile.
Very interesting. Thank you. Obviously a meter from the days before the 'chuck away' society we live in today. Maybe we need to learn from this, before we fill the planet full of cheap non repairable junk. I wonder what percentage of items, which are thrown away, today, have simple, easily repairable faults because we have neither the skills, inclination or are just to lazy to fix!
Modern digital multimeters have many abilities, there are a wide range available to suit most engineers needs. These start from basic models costing only a few Pounds Sterling which are capable of measuring voltage, resistance and current, to expensive and exotic meters. The more expensive meters are capable of performing not only the three functions mentioned above but depending on the needs of the service technician there are meters to measure capacitance, frequency, temperature, transistor specifications
Hey diode pls will u reply my one question. Plsss, I made ir remote controlled using standalone Atmega 328 pu microcontroller which controls 8 relays but 1 relay connected to AC fan which after switching it makes all relays turn off it's like it get reset to off positions. What should I do to avoid this🙄
@@drelectronics13 , I'M still laughing... because it was MY turn. LOL Now, flick your Bic and heat up your relay until your microcontroller melts down. There ya go! That ought to do it.
There were also versions that could measure resistance , the top knobs were for current and voltage dc or ac and the knob on the bottom was for resistance range .
Yes it is called the Avomet II/DU10 U actually own a functional one of these however the batteries used in them arent manafactured anymore so i will have to make something for that.
- …and he probably put a bucket of glue in it. Well, if it was a bucket of cyanoacrylate instant glue, that was the last thing this person did in this world before leaving us a perfect death mask.
It is not so much that things were expensive (and they were) but that folked fixed what they had.. No sense in buying a new one when you could fix the old one.. I am still of that mind set.. I see it passed the cat test so all is well in diode land.. carry on!
This is a moving coil meter (coil moves in a permanent magnet field), so it's not RMS. It shows the average value. Such meters are usually callibrated so that they show the RMS value for sine wave, but they don't show the right value for other waveforms. To measure the real RMS value for any waveform, it would have to be an electrodynamic or moving iron system. But those systems have usually a very low sensitivity.
Maybe if you had the button that was glued you could have released it through heating. I find the beautiful EM meter, it is of high quality. In the past I also bought a universal meter from Russia and it reminds me of this meter. I always have to laugh at your cat assisting.
You are totally wrong with measuring ac voltage, voltage scale on the bottom of indicator and it's indication is right. When you measuring maim voltage Avometer says 0.78 on voltage scale 0.78*300=234V. Upper scales for current.
Já mám Avomet II (DU10) a teď si ho dávám dohromady. 2 spálené bočníky a zřejmě poškozené i předřadné rezistory na rozsazích 300 a 600V. On chce vůbec kompletně poštelovat 😀 dokonce mě napadlo že ho pošlu tobě ať si ho dáš dohromady a vystavíš na poličku do garáže 🤣
Unlike the digital multimeter, the analog multimeter doen't measure true RMS voltage... which explains the difference in readings of alternative current and voltage.
@@elecrticityelectronics8591 well, thus nobody calibrated it for a *perfect* sine wave, right? And «true RMS» in digital meters is a matter of huge amount of small approximations which balance themselves in some way.
@@5Dale65 Czech does have to do with most of his (mis)pronunciation, but unlike other Czechs, he ends his words longer than they should be, even outside English.
Me: *discovers your channel, the dangerous wireless charger video exactly* Geez, this guy's accent sucks! *doesn't stop watching* Fuck it, i'll watch it Me later: Guess I'll stay. *subs* Me now: Somebody tried to fix it with gLyUE
Sir why you are not revealing your face ??.. In your microwave oven video by chance you shown your face during opening the oven but you ommited your face from video by editing.. why ??
Hi DiodeGoneWild, i know that there is like 1% chance to see my comment but, all i want to say is that your videos are amazing, i'm watching them everytime i have some time to spare but, all i want to say is that i don't want for you to leave this platform any time soon because you're doing some great things and for me, it's always a pleasure to watch.
Thanks :). I hope I will keep making my videos as long as I don't pass away ;).
Me too :) Edit: i'm glad that you replied to me ;)
@@DiodeGoneWild I you passed away, would you be a.......
Canceled Czech?
I couldn't resist...
Tech Gorilla ...
Hi Diode I would appeal to the power of the Internet and Patreons to obtain a suitable rectifier either from NOS or salvaged from another meter to finish this restoration completely and in style. Thanks for the video and sharing your very vast knowledge!
1950's car manual- how to adjust valve clearances. 20220 car manual- don't drink the contents of the battery. Times have changed. Great video.
You have to open a museum with all your vintage stuff, I would visit it for sure
Here is the showcase. Who needs museums now?
The resistor: I'm completely blown!
Danyk: Are you series?!
So let's change it with the one I've got heeeeeeeeere xD
And this one cums off
@@ЯСуперСтар XD
Your humor is so good, yet so "bad!" LOL
@@BruceNitroxpro all thanks fly to Danyk and his amazing cat!
That manual is unbelieveably awesome! You don't see anything near like that today.
In some long, almost forgotten time. A craftsman finished building this precision lab equipment. He proudly stamped his seal in the security screw wax well. And put the meter up for sale.
Many decades later we all present watch in awe as DGW diagnoses repairs and educates. :)
Amen. Long live the workpeople of old. I was born before Pearl Harbor, and remember them well!
In my country some people, especially the elderly, still refer to the multimeter as an avometer, even if it is a digital multimeter of any brand 🤷♂️.
Thanks!
thank you for your support ;)
Glad you got your qualified gas technician with you! I totally adore her!
I'm following Louis rossman and right to repair law n stuff. And by looking at the details companies provide to repair their products back then it made me giggle how repairing was appreciated and promoted by companies. And now we have to fight for it.
And without the little apple of his eye making one comment, either!
Beautiful! Especially the manual. Amazing.
Worked as an Electrician for U.S. Corporation, in heavy industry. Though the accuracy of my digital multimeter wasn't an issue, since we often used Testers to see if voltage was there, LEDs for 120, 240, 277, 480, etc., so the Multimeter being off a little didn't matter in my case, but one year I misunderstood the notice about the meter calibration contractor being at work and submitted my meter with the meters from other employees in my department.
Many of us make the mistake of thinking Digital Meters are showing the correct voltages. Though likely you're aware of your own equipment calibration, it occurred to me the analog meter might be closer to the values than you think. I'm not suggesting analog vs digital, I am though saying an uncalibrated digital cannot be entirely trusted.
I watched the contractor use a calibrated test set to verify the readings on a few meters. I don't think he calibrated the meters, but meters that passed the test had a calibration sticker placed on them.
Calibrated meters were used by employees that tested and set-up Protective Relays for Overcurrent (Timed and Instantaneous), Undervoltage, Phase Reversal (that one wasn't normally a problem), Variable Frequency Drives, etc., and another set of employees that calibrated 4 to 20 milliamp Process Flow Controls, and a host of other things I'm not familiar with.
Great shows all, keep up the great work.
Well getting the needle up as we get older often poses more of a challenge.
And I get that... and I'm ONLY 78!
ah man that was class!!! just loved that.. and I learned so much on how a meter works, never watched anything on how meters work before... and Im glad to of seen this!!! and id say that wasn't a cheap meter when it 1st came out!!!
I recall that some old analog meters mentioned a method of calibration which utilized adjustment of a MAGNETIC SHUNT on the movement. The magnet was made stronger than needed and then there was a leakage path mounted between the two poles. Moving the added pole pieces closer to each other shunted some of the magnetic field, thereby reducing the field through the moving coil. That reduced the meter deflection. I have personally never done this kind of adjustment, but the idea has stuck in my mind.
Interesting as usual. That owners manual is basically a treatise on how to build an analog multimeter. The brake fluid tester is just going to give some indication of water content.
Great stuff that manual is an amazing find.
Hi, Tx again for yet another interesting video.
Yes back in the 50’s materials were expensive and labour was cheap. In the west and probably even more so in Eastern Europe. So repairing such a device must have made sense.
Nowadays we would call it sustainable. And that also makes sense 😄
Nice restoration with respect for its history.
Rx again!
Janus Kobain ack
@@Conservator. that's niiiice! © ;D
Janus Kobain 🤣
Have a analog meter protek A800 which also had lost some accuracy but all it was required is calibration on the trimmers, it is a modern version. This model is another story and restauration was a pleasure to see, but hard to made .... Thanks for the video.
Your videos are really cool, I wish I could find some old equipment like that to take a look myself.
11:26, 11:30 with the captions on
Cum on m8...that wasn't funny
Hahahaha
One restoration suggestion:
Keep the galvanometer of the broken one, but design a circuit with modern components to replace the rest of it.
Well done.
Very good video 👍
Wonderfull. Old but function. New will be bad after waranty and not possible to repair. Thank you cat!
What is the voltage drop of the copper oxide rectifier? Can't it be replaced with even a schottkey or germanim diode bridge made from 4 descrete diodes? Ive never heard of a copper oxide rectifier before.
Hey. voltage drop is about 0,2 - 0,35 V and can changed out to schottky diodes today. Some adjustments will be needed for accuracy.
Great video! Wild hunch - From what I hear, you might be able to revive that rectifier with a little use, or replace it with either silicon schottky signal diodes or perhaps germanium diodes. They are said to have similar non-linear characteristics.
If someone wants to get something like that - there are meters like that with 0.03 V range, these have a hand hanged with a wire, not a bearing. However, they are all worth some effort, much handwork went into these meters in the day. I got an old EAV, it has its role on the bench, you just "see more" using a meter with a hand.
great video, very nice old meter.
gimme da mita!
You're awesome, Diode :-)
Cool man ....
Kdysi jsem plně funkční AVOMET z Metry Blansko také měl a vyměnil jsem jej za RLC můstek. Někde..? mám z AVOMETu ještě původní náhradní usměrňovač.
Thanks for the info
I never thought that a manual that I can't read would be fascinating...
I don't think it's because they were expensive. That's the modern way of thinking. Back in the day it was all about availability. If the Communist Party has decreed that X amount of multimeters and Y amount of multimeter spare parts should be produced-that's what you're stuck with. If later it turns out Y was too small-well, you're out of luck. It may be another 10 or 20 years before the decision to increase the production of Y clears the bureaucratic chain of command. So you blew your analog current meter and want to buy some spare parts? No you can't-the industry simply doesn't make enough of them. You'll have to roll your own, i.e. rewind the copper windings, and dip it in resin. Can you buy the copper wire and the resin? Of course not: the Communist Party has decided that the general public shouldn't need this stuff, so it isn't for sale to the public. You'll need to steal some wire from your factory (if you work at a factory), or buy it on the black market from somebody who stole it from their factory. Both of you can go to prison for it-and not for stealing, but rather for the crime of "private sale and purchase of goods." All that just to obtain some bloody copper wire! Ah, the joys of Socialism and the planned economy.
well, it can be interesting to see whats inside the rectifier, I did not see this type anywhere inside of old school electronics.. I guess this one can be KUPROX maybe, cheaper than selenium
You are genus . So It is time to make more complex tutorial like Online UPS.
Wow amazing
1% sounds very good for d.c readings, i imagine if it was used for repairing valve radios it would be way more accurate than it needed to be :-D.
Did that site state the full scale deflection current for the meter movement?, i would have wanted to check the meter before touching anything.
Shame that the rectifier is special :-(
I think I'd have wanted to figure out a more modern circuit using modern components, for sure. That capacitor would be HISTORY. The diodes, also.
Bruce Nitroxpro - but the principles would be the same, so the same arrangement of resistors would be required. That is resistors in parallel (shunt resistors) for the current ranges. And series / voltage divider (multiplier resistors) for the voltage ranges.
The AC ranges are more tricky, because the characteristics of the diodes affects the needle position, and hence scale range markings on the plate are designed for the particular type of diode used. So changing this or redesigning this part of the circuitry to match up with the existing scale is not really worthwhile.
Nice work man (y) Wish I reach your level one day.
Wow, when you are measuring High AC current, every time you place your hand close to it , the meter needle moved up.
Maybe electrostatic forces, maybe just moving air....
@@DiodeGoneWild , Those old meters seldom had that much sensitivity, I'd bet this fellow was about to electrocute himself. Just a guess.
very good.
your English pronunciation is very lovely and i like your voice and way of talking...
Dude please teardown the 30watts warp charger from OnePlus,it delivers 6amps at 5volts ,please dudee
Mam Avomet. Ty same problemy... Usmernovac je asi poskozeny, asi 20% dolu. Zkusim germaniove diody. Pozdrav z USA.
Amazing !
What about ESR of capacitor, i think you not check it
Very interesting. Thank you. Obviously a meter from the days before the 'chuck away' society we live in today. Maybe we need to learn from this, before we fill the planet full of cheap non repairable junk. I wonder what percentage of items, which are thrown away, today, have simple, easily repairable faults because we have neither the skills, inclination or are just to lazy to fix!
Modern digital multimeters have many abilities, there are a wide range available to suit most engineers needs. These start from basic models costing only a few Pounds Sterling which are capable of measuring voltage, resistance and current, to expensive and exotic meters.
The more expensive meters are capable of performing not only the three functions mentioned above but depending on the needs of the service technician there are meters to measure capacitance, frequency, temperature, transistor specifications
Yea.
tvl 100% pražák, to protahovááánííí znííí stráášně
Dany diode
Cool. Thanks!
A vomet?
I remember when I was a kid i got a multimeter that was a quite similar to this one but it had a grey metal enclosure and 2mm terminals
use dremel grinding to fix that switch
Hey diode pls will u reply my one question. Plsss,
I made ir remote controlled using standalone Atmega 328 pu microcontroller which controls 8 relays but 1 relay connected to AC fan which after switching it makes all relays turn off it's like it get reset to off positions. What should I do to avoid this🙄
Stop laughing long enough, and I'll tell you.
@@BruceNitroxpro ?? Tell me
@@drelectronics13 , I'M still laughing... because it was MY turn. LOL Now, flick your Bic and heat up your relay until your microcontroller melts down. There ya go! That ought to do it.
@@BruceNitroxpro . Well thank u for ur suggestion. And now stop laughing just go and subscribe to my channel goldboy tricks 👈
can you do a video about your alpha gaiger counter?
There were also versions that could measure resistance , the top knobs were for current and voltage dc or ac and the knob on the bottom was for resistance range .
Yes it is called the Avomet II/DU10
U actually own a functional one of these however the batteries used in them arent manafactured anymore so i will have to make something for that.
What happens when you connect multimeter to another same multimeter?
You will have another mini multimeters every nine months
glyuuu
Screeeew that gleeew!
Глю
- …and he probably put a bucket of glue in it.
Well, if it was a bucket of cyanoacrylate instant glue, that was the last thing this person did in this world before leaving us a perfect death mask.
You are from which country
He's from the Czech Republic.
TNX for another GREAT video !
73 N8AUM
Nice very cool 👍👌
It is not so much that things were expensive (and they were) but that folked fixed what they had.. No sense in buying a new one when you could fix the old one.. I am still of that mind set.. I see it passed the cat test so all is well in diode land.. carry on!
Is it showing the RMS value or is it just wrong on AC?
This is a moving coil meter (coil moves in a permanent magnet field), so it's not RMS. It shows the average value. Such meters are usually callibrated so that they show the RMS value for sine wave, but they don't show the right value for other waveforms. To measure the real RMS value for any waveform, it would have to be an electrodynamic or moving iron system. But those systems have usually a very low sensitivity.
Maybe if you had the button that was glued you could have released it through heating.
I find the beautiful EM meter, it is of high quality.
In the past I also bought a universal meter from Russia and it reminds me of this meter.
I always have to laugh at your cat assisting.
Цешку купил, поди?))
Čtyřnozí pomocníci 😺 jsou někdy užiteční a jindy "zlobí". 😀
You are totally wrong with measuring ac voltage, voltage scale on the bottom of indicator and it's indication is right. When you measuring maim voltage Avometer says 0.78 on voltage scale 0.78*300=234V. Upper scales for current.
Já mám Avomet II (DU10) a teď si ho dávám dohromady. 2 spálené bočníky a zřejmě poškozené i předřadné rezistory na rozsazích 300 a 600V. On chce vůbec kompletně poštelovat 😀 dokonce mě napadlo že ho pošlu tobě ať si ho dáš dohromady a vystavíš na poličku do garáže 🤣
I here just want to confirm he use the same accent..
Unlike the digital multimeter, the analog multimeter doen't measure true RMS voltage... which explains the difference in readings of alternative current and voltage.
But they are already calibrated for pure sine wave and he was using sine wave.
@@AmitabhAnkur your are right if the sinewave is perfect.. but in reality it's not perfect and the analog meter doesn't take into account this..
@@elecrticityelectronics8591 well, thus nobody calibrated it for a *perfect* sine wave, right?
And «true RMS» in digital meters is a matter of huge amount of small approximations which balance themselves in some way.
I wonder what a multimeter looks like 70 years from now? They probably wont exist the way this world is going.
👍
Great!! :D
Non PCB electronics just hurt my eyes
Way too much gljue! 😁
Cmq chi ha messo la colla E! UN!FOTTUTO! G.E.N.I.O.!!!!!!!!
Not hundert, hundred!
Do you reaaly speak that wayyyyy or is just your signature voiceeeee? Pleaaaaase tell meeeee.
I believe czech really sound like that.
@@5Dale65 Czech does have to do with most of his (mis)pronunciation, but unlike other Czechs, he ends his words longer than they should be, even outside English.
mam doma
Пипец, дядя, у тебя произношение. 25 минут изнасилования ушей, хоть бу субтитры добавил
Будь добр к этому человеку. Он изо всех сил старается улучшить понимание между людьми.
Так есть же субтитры. На английском.
Если уши сильно устают, можно звук выключить и без него смотреть)
Some charger...
G.T.A. gran thief analogmeter
Me: *discovers your channel, the dangerous wireless charger video exactly* Geez, this guy's accent sucks! *doesn't stop watching* Fuck it, i'll watch it
Me later: Guess I'll stay. *subs*
Me now: Somebody tried to fix it with gLyUE
Czenglish hell
Is this guy speaking Rissian or Italian? XD
He is speaking czeeeeeeeeeeeeeech or slooooooooovaaaaaaaaak.
@@quickbf "Jack, slow f**k" XD
Iam from czech
Ma come cavolo parli?
10
Screeew
Owwww weee
Gleeeeue
SKRJUUUUUUUUUUUUUUUUUUUSSSSSSSSSSSSSSSS
Well, can't blame you for having fun with us together. His accent is a sweet raisin in the cake. ;D
Gyuu
Fifth to comment
Your accent is SO DISTRACTING [is it from somewhere, on Earth?], not your fault, of course, but DAMN... Still, good video
Sir why you are not revealing your face ??..
In your microwave oven video by chance you shown your face during opening the oven but you ommited your face from video by editing.. why ??