This reminds me when we bought a flat the big fan in the roof space didn't work. After watching a few of your videos i replaced the big capacitor and it started working again, saved me having to fork out for a new inline fan
In 1999 I was an intern in a household appliance repair workshop. There was a guy who came back regularly for replacing windings in his circular saw motor. When he brought it for the third time our foreman took the motor in and told the guy to bring the capacitor for checking. The guy reluctantly brought it, saying that he checked it and all was OK. When the guy brought the capacitor, foreman connected it directly to AC socket that had 15A meter in series (and some fuse), they waited for half a minute. The guy started saying: "see, told you it…" and suddenly the amp meter started maxing out intermittently, and some fireworks appeared. The capacitor was busted, now "for sure", with burn marks. Foreman took a new capacitor from a shelf, added it to the third-time-fixed motor, and told the guy: "You already paid for it". Fun times :)
I know you didn’t ask, but if I were you I would still tell the seller that it arrived damaged. You can explain you’re not upset and are not looking for a refund, but it could still be good feedback for the seller, in case they sell to someone who will care and it will end up costing them even more money to replace or refund than it would have to pack it more carefully.
After seeing so many videos of how badly parcels are treated, it's hardly a surprise this one was obliterated. Nice autopsy of the capacitor - In times gone by, I did the same to several busted old capacitors, just for fun 🙂
You talking about the inrush current reminds me of my high school back in the late nineties. After a big renovation of the building we also ended up with new computer rooms, which had 30 computers each. Near the door was an electrical panel with two buttons allowing a teacher to (de)energize all the outlets in the room. You can probably imagine how quickly they learned to not use that button to switch on 30 CRT monitors at once after tripping the main breaker a couple of times :D
I heard a similar story about a school I once worked at. They did just that and heard a loud bang eminating from the hallway, where a fuse had a very violent untimely death.
Another excellent Big Clive video! What did want from a 250w ballast. FYI we have several now defunct 400w ones laying around going to the scrap bin at work.
I believe X2 capacitors have a slightly different failure mode than normal capacitors, I think, based on the choice of dielectric material.They absorb over voltage spikes which puncture the dielectric but are designed to short the layers. Obviously the capacitance will lower but eventually they can short the supply blowing a protection fuse as an indication of failure. Y type capacitors are designed to fail open-circuit as if they were to go short they could potentially connect a live supply to an isolated piece of metalwork causing a shock hazard. Therefore X2 capacitors should never be used to replace Y capacitors although the other way round poses no problems except never knowing if they've failed without measuring them. The infamous Rifa X2 caps in old equipment have a further failure mode, although unintentional, by the outer epoxy coating cracking and allowing moisture ingress which causes sudden shorts and vaporisation of the internals in an explosive and often very smelly and smokey manners 😉
Many times I would wind a rope or cord around the shaft of a motor or machine. With the power on I'd "pull start" it. That'd get it going while I was off to get another capacitor. It's a fun trick to do in front of the customer!
I used to visit Cambridge Capacitors in Romsey, UK. They made the same type of capacitors for mainly lighting, mortor starters, British Rail and a lot more. I think all of their capacitors were epoxy potted, to stop moisture ingress. But Chinesolium products are not built to last, that why they are cheep and not so well built and designed. Thanks fore the carrier (Chineese) for the break down.
When replacing degraded dropper/motor run/etc. caps always go up in voltage if you have the space for it and don't want a repeat, the stronger you can make the dielectric the longer it will take to degrade out of tolerance. Ideally sourced from an actual industrial/electronics supplier or local hardware store (if you have one nearby cool enough to sell electric motor parts), not a random brand ebay/amazon/ali part. Like I don't expect further trouble from the furnace blower as I went from 370V to 440V and went to the trouble to source a reputable part.
I think Dave Jones did an interview with a guy in capacitor manufacture who said these film capacitors are more likely to lose value due to moisture ingress? That stuff at the end...is that the schoopage you've mentioned earlier? EDIT: I should have kept watching; you confirm it at about 5:50.
My electric cement mixer would sometimes not start on the switch. Checked everything and found the big capacitor was down on the ohms reading.. I replaced it with a slightly higher value replacement and it has worked perfectly ever since.
I had heard the idea of self healing in polyfilm capacitors, but somehow I never got round to studying what that meant. Sorta like myself, blow out a bit somewhere and it heals but is evermore lowered capacity. Got chunks of film blown out all over these days. Takes many strikes for the light to come on solid during a nippy morning. There is a sodium vapor lamp on the pole out back that was out for several years and I never complained because it was supplied by the utility provider, and wasnt charged to my bill. Well they sent a man out to replace the one out front with an LED and it didnt work. I got to looking and realised the one in back had the wire disconnected from the supply that went on to the next pole which had the new LED on it. Turns out the neighbor was paying for both and had them come back out to restore the connection. Comical that the dude changed out that fixture and didnt bother to go to the next pole and fix the connection so it would work. So the much more useful ~ 2700K LED then worked but the old orange sodium vapor would cycle all night and then, why wouldnt he change that 26+ year old sodium vapor for a new led with much better color and double efficiency while there? It took about a month, but the Sodium vapor came back around and now works as expected? Was surprized at that because the older metal halides, once they start cycling on too much current, too hot, they only get worse. Ever had the desire to get a BIG roll of mylar and a big roll of aluminium and make a BIG capacitor? My dad showed me an article when I was a kid about an experimental megacapacitor built in a lake, been dreaming of what you could do with a hazardously large cap ever since. Capture a lightning bolt? If the leakage could be designed low enough, a single, decent sized lightning bolt would power my home for the rest of my lifetime. Well I never had a large enough property on which to store that cap comfortably far enough away from the house to reasonably account for the unexpected effects of intentionally coaxing a lightning bolt to discharge to right here, approximately.Turns out the neighbors get suspicious when lightning bolts hit too close, too often. Appropriately sized diodes and spark gap shunting of excess are no small task either. Might as well dig a sand pit and charge that with aluminum powder to sell fulgarites on ebay, should all else fail. Prolly a good thing I never had much mad money....
A few months ago, I had the misfortune to change capacitor in a tumbler drier, never again. You virtually have to dismantle the drier, that took two hours and resemble a macano kit, when dismantle, 5 minutes to install the capacitor, 3 hours to reassemble the drier. At my hourly rate , it's cheaper to buy a new tumbler drier and pay for the 5 year warranty.its not cost effective to just change the capacitor, you need to change drive belts , tension pulleys and bearings at the same time . At make sure you have a first aid kit , because of the sharp edges ,
Awesome destructive shipping .I got a Variac with Broken brushes and bent shaft via Amazon shipping .The company sent me a brand new one free of charge and I fixed the old one .bought new brushes for $5 each.replaced them and now have a spare 2kva variac brand new in box and using my damaged one on bench and it's fine .Scooped up a 5kva 240 /240v isolation transformer from the scrap yard ..HID Lighting eats contactors like crazy .we use 600/347 v for high bay Lighting .Dangerous as hell and should be banned with the new LED lighting technology .we should be operating at lower voltages .Too many lost their lives to open neutrals on 3 phase lighting systems .
What is the current consumption on like a 20w cfl that "buzz" fails in a remote spot like an out building and draws for months but stays dark and you don't notice it and think it is off? -asking for a friend
My ancient Dual belt drive record player had a duff motor start capacitor, it would start backwards half the time. Didn' t hear any satanic messages, though!
I've had IR motion sensor, that turns the light on/off/on/off/on etc. and I know it would be easily repaired, but they're so cheap, that it's easier to just install a new one. Then the new one works longer, so it's a win.
In my country VERY BAD cap will usually filled with half or very small cap) and even ANOTHER cap inside (for example 100000uF 50V with the inside are 4700uF 35V) for cheaper price and also filled with aspalt or wax. Mostly happen in Chinese cap or very cheap audio use cap
So the older, long lasting capacitors were potentially bad for the environment, and/or gave some Brussels bureaucrats hissy fits, but the new ones quickly end up in landfills. And that is what they call progress?
What would happen if you were to try and apply power from say a variable PSU to a strip of that metailised foil ? Also I bet that foil would look pretty in a microwave 😄
I broke a 4,800 dollar (US) ebay sale years ago over potential long-distance shipping damage. They offered 500 more for international shipping and I had a moment of weakness and agreed. It also mattered that it is Japanese military and sending it china seemed inherently wrong. Only people in the states that contacted me were museums looking for a donation so they can sell it a year later themselves like they are notorious for in America. Also having trouble getting a hold of Mitsubishi heavy industry's museum and that notorious war shrine in Japan. Mitsu hq's in Maryland and Texas also do not reply or call back either. Help please if you have a connection. Stuff needs to go back to Japan.
It's a T/R and the throat mic for a Zero. Also looking for 1930's Japanese vacuum tubes for it, one has the top nipple connection wire broken, Idk how to fix it.
This reminds me when we bought a flat the big fan in the roof space didn't work. After watching a few of your videos i replaced the big capacitor and it started working again, saved me having to fork out for a new inline fan
Must be a start capacitor. We don't have these in states on home owner fans. But lots of industrial motors (compressors etc) we have them
Fixed my geriatric tumble dryer a while back, exactly as described. Nominal 8.3uF cap was down to 2uF 😮
In 1999 I was an intern in a household appliance repair workshop. There was a guy who came back regularly for replacing windings in his circular saw motor. When he brought it for the third time our foreman took the motor in and told the guy to bring the capacitor for checking. The guy reluctantly brought it, saying that he checked it and all was OK. When the guy brought the capacitor, foreman connected it directly to AC socket that had 15A meter in series (and some fuse), they waited for half a minute. The guy started saying: "see, told you it…" and suddenly the amp meter started maxing out intermittently, and some fireworks appeared. The capacitor was busted, now "for sure", with burn marks. Foreman took a new capacitor from a shelf, added it to the third-time-fixed motor, and told the guy: "You already paid for it". Fun times :)
I know you didn’t ask, but if I were you I would still tell the seller that it arrived damaged. You can explain you’re not upset and are not looking for a refund, but it could still be good feedback for the seller, in case they sell to someone who will care and it will end up costing them even more money to replace or refund than it would have to pack it more carefully.
I love Big Clive's serene, calming voice. Good for bedtime stories!
What sort of bedtime stories do you want to listen to? What sort do you think he would provide?
So they add the balls for more smoke and flames? 🤣
That did go through my mind.
A sharp blade is so much safer than a dull blade. If the blade is dull it will snag increasing the probability of a slip as you increase force on it.
After seeing so many videos of how badly parcels are treated, it's hardly a surprise this one was obliterated.
Nice autopsy of the capacitor - In times gone by, I did the same to several busted old capacitors, just for fun 🙂
the postal service did a proper number on that, good you want the parts and to the whole thing. thanks for the look inside the cap 2x👍
Big Clive - Once again making the mundane simply fascinating!
You talking about the inrush current reminds me of my high school back in the late nineties. After a big renovation of the building we also ended up with new computer rooms, which had 30 computers each. Near the door was an electrical panel with two buttons allowing a teacher to (de)energize all the outlets in the room. You can probably imagine how quickly they learned to not use that button to switch on 30 CRT monitors at once after tripping the main breaker a couple of times :D
our teacher used to throw a fit and do that, big fat baby
I heard a similar story about a school I once worked at. They did just that and heard a loud bang eminating from the hallway, where a fuse had a very violent untimely death.
That's a first! Usually they are filled with tar or epoxy, sometimes wax.
I wish more people were like you, seeing the positive instead of going mad and grumpy over inconsequential things...
Who knew this thing had balls? Great capacitor autopsy sir!
Those weren't big balls, but yes.
Wow. Thanks again Big Clive. so cool to know.
What a load of balls!
That's what she said!
Another excellent Big Clive video! What did want from a 250w ballast. FYI we have several now defunct 400w ones laying around going to the scrap bin at work.
I believe X2 capacitors have a slightly different failure mode than normal capacitors, I think, based on the choice of dielectric material.They absorb over voltage spikes which puncture the dielectric but are designed to short the layers. Obviously the capacitance will lower but eventually they can short the supply blowing a protection fuse as an indication of failure. Y type capacitors are designed to fail open-circuit as if they were to go short they could potentially connect a live supply to an isolated piece of metalwork causing a shock hazard. Therefore X2 capacitors should never be used to replace Y capacitors although the other way round poses no problems except never knowing if they've failed without measuring them.
The infamous Rifa X2 caps in old equipment have a further failure mode, although unintentional, by the outer epoxy coating cracking and allowing moisture ingress which causes sudden shorts and vaporisation of the internals in an explosive and often very smelly and smokey manners 😉
1997! I'm glad you tested how out of tolerance they were now 😅
Many times I would wind a rope or cord around the shaft of a motor or machine. With the power on I'd "pull start" it. That'd get it going while I was off to get another capacitor. It's a fun trick to do in front of the customer!
Foiled again by a capacitor, eh? 8^) Neat to see one apart (fully). Cheers!
A nice teardown, I never really took one apart yet. I'd expect a cap to be potted rather than having any loose filler material inside.
I used to visit Cambridge Capacitors in Romsey, UK.
They made the same type of capacitors for mainly lighting, mortor starters, British Rail and a lot more.
I think all of their capacitors were epoxy potted, to stop moisture ingress.
But Chinesolium products are not built to last, that why they are cheep and not so well built and designed.
Thanks fore the carrier (Chineese) for the break down.
The wire stripper-glitter...
When replacing degraded dropper/motor run/etc. caps always go up in voltage if you have the space for it and don't want a repeat, the stronger you can make the dielectric the longer it will take to degrade out of tolerance. Ideally sourced from an actual industrial/electronics supplier or local hardware store (if you have one nearby cool enough to sell electric motor parts), not a random brand ebay/amazon/ali part. Like I don't expect further trouble from the furnace blower as I went from 370V to 440V and went to the trouble to source a reputable part.
Been subscribed to you for ages, love it!
oh, the titty bots, joined 1 month ago but "subscribed to you for ages" 🤦
I’d love to see a series about consumer electronics diagnosis and repair from basic to complex. The process!
I think Dave Jones did an interview with a guy in capacitor manufacture who said these film capacitors are more likely to lose value due to moisture ingress?
That stuff at the end...is that the schoopage you've mentioned earlier? EDIT: I should have kept watching; you confirm it at about 5:50.
It's good when the sacrifice of others (equipment) teaches us stuff. It's good I tellz ya!
Are the polystyrene balls to stop or dampen the humming/ buzzing when the power is on?
My electric cement mixer would sometimes not start on the switch. Checked everything and found the big capacitor was down on the ohms reading.. I replaced it with a slightly higher value replacement and it has worked perfectly ever since.
I had heard the idea of self healing in polyfilm capacitors, but somehow I never got round to studying what that meant. Sorta like myself, blow out a bit somewhere and it heals but is evermore lowered capacity. Got chunks of film blown out all over these days. Takes many strikes for the light to come on solid during a nippy morning. There is a sodium vapor lamp on the pole out back that was out for several years and I never complained because it was supplied by the utility provider, and wasnt charged to my bill. Well they sent a man out to replace the one out front with an LED and it didnt work. I got to looking and realised the one in back had the wire disconnected from the supply that went on to the next pole which had the new LED on it. Turns out the neighbor was paying for both and had them come back out to restore the connection. Comical that the dude changed out that fixture and didnt bother to go to the next pole and fix the connection so it would work. So the much more useful ~ 2700K LED then worked but the old orange sodium vapor would cycle all night and then, why wouldnt he change that 26+ year old sodium vapor for a new led with much better color and double efficiency while there? It took about a month, but the Sodium vapor came back around and now works as expected?
Was surprized at that because the older metal halides, once they start cycling on too much current, too hot, they only get worse.
Ever had the desire to get a BIG roll of mylar and a big roll of aluminium and make a BIG capacitor? My dad showed me an article when I was a kid about an experimental megacapacitor built in a lake, been dreaming of what you could do with a hazardously large cap ever since. Capture a lightning bolt? If the leakage could be designed low enough, a single, decent sized lightning bolt would power my home for the rest of my lifetime. Well I never had a large enough property on which to store that cap comfortably far enough away from the house to reasonably account for the unexpected effects of intentionally coaxing a lightning bolt to discharge to right here, approximately.Turns out the neighbors get suspicious when lightning bolts hit too close, too often. Appropriately sized diodes and spark gap shunting of excess are no small task either. Might as well dig a sand pit and charge that with aluminum powder to sell fulgarites on ebay, should all else fail. Prolly a good thing I never had much mad money....
That knife may be bad news for fingers but it's great for giving my glutes a workout. Squeaky bum time watching. 😱
I guess sand was too expensive to pack those caps with... :P
What a load of balls. (I hate that packing material)
A different sort of messy to the goo that ejects from oil-filled capacitors when they get punctured.
Ohhh, a weed growers lamp ballast...Thank God for leds.
A few months ago, I had the misfortune to change capacitor in a tumbler drier, never again. You virtually have to dismantle the drier, that took two hours and resemble a macano kit, when dismantle, 5 minutes to install the capacitor, 3 hours to reassemble the drier. At my hourly rate , it's cheaper to buy a new tumbler drier and pay for the 5 year warranty.its not cost effective to just change the capacitor, you need to change drive belts , tension pulleys and bearings at the same time . At make sure you have a first aid kit , because of the sharp edges ,
Awesome destructive shipping .I got a Variac with Broken brushes and bent shaft via Amazon shipping .The company sent me a brand new one free of charge and I fixed the old one .bought new brushes for $5 each.replaced them and now have a spare 2kva variac brand new in box and using my damaged one on bench and it's fine .Scooped up a 5kva 240 /240v isolation transformer from the scrap yard ..HID Lighting eats contactors like crazy .we use 600/347 v for high bay Lighting .Dangerous as hell and should be banned with the new LED lighting technology .we should be operating at lower voltages .Too many lost their lives to open neutrals on 3 phase lighting systems .
I hope you share what you do with the inductor =D
However did Clive know that strip joints involve glitter?
“ GoodEvening Clive❤”
Destroyed in that special kind of a way
wait arent those old caps full of PCB's you know the chemicals not the boards...
What is the current consumption on like a 20w cfl that "buzz" fails in a remote spot like an out building and draws for months but stays dark and you don't notice it and think it is off? -asking for a friend
My ancient Dual belt drive record player had a duff motor start capacitor, it would start backwards half the time. Didn' t hear any satanic messages, though!
Should take a look at a SOX lamp ballast, HPS ballast, and MV ballast and see how they differ.
Alternative to "one moment please" >> abracadabra
Why ya got a grow lamp there mate? Lol
Can't believe how awesome this is!
Tell me more about the glitter at the stripper club. How was the lighting? 😇
I've had IR motion sensor, that turns the light on/off/on/off/on etc. and I know it would be easily repaired, but they're so cheap, that it's easier to just install a new one. Then the new one works longer, so it's a win.
hello again from newfoundland
Will we get to see what you're planning to do with that yuge ballast???
In my country VERY BAD cap will usually filled with half or very small cap) and even ANOTHER cap inside (for example 100000uF 50V with the inside are 4700uF 35V) for cheaper price and also filled with aspalt or wax. Mostly happen in Chinese cap or very cheap audio use cap
So the older, long lasting capacitors were potentially bad for the environment, and/or gave some Brussels bureaucrats hissy fits, but the new ones quickly end up in landfills. And that is what they call progress?
I still haven't made my own capacitor, I was going to for fun.
Maybe soon. 😀
Oh no. You've introduced ersatz crafts herpes to your home.
And the purpose of the polystyrene balls in the cap is ????
What would happen if you were to try and apply power from say a variable PSU to a strip of that metailised foil ? Also I bet that foil would look pretty in a microwave 😄
This fault is one of the top reasons why your alternator on your emergency generator stops giving output. another cheap fix.
Great! Now my comments praising a video also get deleted for no reason. I just stop commenting on TH-cam.
This one's visible.
Clear your browser history including all cookies and temp data. I've had the same thing happen and clearing that fixed it.
Shoopage.
😎
One moment please 😂
Seems I’m seeing this late ?
Nope. Just released for general viewing.
Paterons get to see videos early.
Its a Huge mess 😂 just like the country!... Rite Big Dude, TFS, GB :)
I broke a 4,800 dollar (US) ebay sale years ago over potential long-distance shipping damage. They offered 500 more for international shipping and I had a moment of weakness and agreed.
It also mattered that it is Japanese military and sending it china seemed inherently wrong.
Only people in the states that contacted me were museums looking for a donation so they can sell it a year later themselves like they are notorious for in America.
Also having trouble getting a hold of Mitsubishi heavy industry's museum and that notorious war shrine in Japan. Mitsu hq's in Maryland and Texas also do not reply or call back either. Help please if you have a connection. Stuff needs to go back to Japan.
It's a T/R and the throat mic for a Zero. Also looking for 1930's Japanese vacuum tubes for it, one has the top nipple connection wire broken, Idk how to fix it.