2KVA 120V Variac Autotransformer (Incredible Buy)

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Looking for a good quality, high current 120V Autotransformer (Variac) at a very reasonable price? Look no further, in this video I'll show you the unit, demonstrate how this extremely useful equipment works, perform a partial teardown, and show 2 or 3 extremely minor modifications that I made. I wasn't expecting total perfection due to the low cost, but it did surpass my expectations. You won't find this unit being sold anywhere close to this price, so I have a feeling the deal may not last. Enjoy the video!
Link to 120V / 2kVA Variac shown in this video:
amzn.to/2KLzMzC
Larger 120V / 3kVA Variac:
amzn.to/3682umV
Many Variacs at LOW prices:
s.click.aliexpress.com/e/_dY3...
(Amazon & Aliexpress Affiliate Links)
***ATTENTION: The original deal at $52.00 shipped did not last due to very strong demand once this video was shown.
Link to a "reasonably" priced 230V Variac:
amzn.to/2sAlCZZ
**Help me make more videos by visiting the link below. All donations, big or small, would be greatly appreciated. Thank you!
www.paypal.me/electronicsNmoreYT
Bobby Tectalabyss & bklynlandlord, Thanks for your generous $5/mo donation!
**For GREAT deals(Usually cheaper than EBAY) on electronics, drones, automotive tools, household items, phone accessories, locksmith tools, & much more, please visit the link below and SAVE IT AS A BOOKMARK on your computer or smartphone to Banggood for future purchases. (Your purchase supports my channel!)
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*Try these money saving coupon codes: affiliate6 or aff7off or f8aaf1 or 781622 or 5719ed or elec* or ask if other codes are available!
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16 июн 2017

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Комментарии : 245

@electronicsNmore 7 лет назад

Thanks for watching guys! If you're looking for other equipment/items at great prices, then please refer to my video playlist below. Scroll through the list to look for items of interest. ru-vid.com/group/PLQ6IOhUBblU161growMalXOs1Ers6q_tj

@tersta1 3 года назад

I have a pure sine wave inverter that's putting out about 110V and I have an electronic pilot ignition on my gas water heater that demands exactly 120V. I'm trying to find power line conditioner will boost to a steady 120V . Will this AC Variable Automatic Voltage Regulator Converter do the job of stabilizing the output voltage to 120V?

@electronicsNmore 3 года назад

@@tersta1 Yes. You can boost up the AC input voltage to around 135V.

@tersta1 3 года назад

@@electronicsNmore Perfect! I'm ordering one. Thanks. :)

@electronicsNmore 3 года назад

@@tersta1 If it's not on sale, use the coupon code.

@tersta1 3 года назад

@@electronicsNmore For sure, I used the coupon to get a few dollars off and it was a lower price than other brands too. Good deal . Thanks for the video.

@davidlong1786 Год назад

I bought one of these or at least very similar and added a digital volt/amp/watt/energy display for better accuracy. While doing so I discovered that one power outlet was wired wrong, having the neutral and hot leads reversed. I urge everyone buying these to check them to make sure things are wired properly.

@Omkarah 5 лет назад

Thank you so much for this wonderful review! I bought one today on eBay for $67.99 with free shipping from California. I am going to use it to control a Poppery II popcorn popper used to roast green coffee. This allows one to control the power, thus temperature. I am going to plug in a "kill-a-watt meter" into the variac, and the popper into the meter. That way I can monitor the wattage and change the temperature at different points during the roast. When I receive the variac I will open it up and check all the connections, and like you mentioned, possibly resolder some.

@IronGordon 6 лет назад

thanks for posting a detailed video of this. I've been researching and this answered a lot of questions for me.

@electronicsNmore 6 лет назад

Thanks for watching! Be sure to check out my extensive video playlists for other great videos of interest to you ,rate thumbs up, and share my channel with friends.

@cometcal2 4 года назад

Thank you for the detailed observation of the product. Though some of the viewer comments are offensive, the banter gave me a greater understanding of the pros and cons.

@ljose007 6 лет назад

Thanks for this great presentation; I find this to video to be very useful. Keep up the great work.

@Pyridox 7 лет назад

Thank you for the info & demo on this. I was wanting one of these for repairing old tube radios and other electronic equipment, in which this is a necessary to bring the voltage up gracefully. The reason why I haven't gotten one was the price, several hundred dollars usually and most are not rated as high as this one 2000 Watts (VA). For accuracy, it's always good to have a DMM showing the voltage. The one that you are using is a decent meter, it reads AC voltage in RMS. I'm ordering one now, and thanks for the coupon code. Saved me another $3.27!

@electronicsNmore 7 лет назад

Thanks for your support Pete! If you haven't checked out the other great products shown on this channel, then please click the link below and see if anything interests you. ru-vid.com/group/PLQ6IOhUBblU161growMalXOs1Ers6q_tj

@MrNigel1340 7 лет назад

Thank you for a well laid out and informative video, have just purchased a 240v Variac and this may possibly be one of the best purchases I have made to compliment the tools in the workshop and for future experiments, regards Doc Cox

@electronicsNmore 7 лет назад

Did you find a good deal on a 240V version? Thanks for watching!

@marklowe7431 4 года назад

We see these in Australia as well. Was a little concerned about how safe they are but it looks totally fine. Thanks for posting the video. Very helpful.

@electronicsNmore 4 года назад

Thanks for watching Mark! Be sure to look over my extensive video playlists for many other videos of interest to you, and most importantly share links to my videos on social networking sites. ru-vid.complaylists

@yosmith1 7 лет назад

Just ordered one. Hard to pass up on that kind of deal! Thanks for sharing

@electronicsNmore 7 лет назад

Thanks for supporting my channel. Be sure to rate thumbs up and share.

@hiseminencetheholymacdiarmada 4 года назад

I have one of these between my wall outlet and my drill press, it’s great for precise rpm on the drill press and eliminates changing the belt to different pulleys.

@qua7771 3 года назад

@Mo no Not necessarily true.

@ripstephenhawking8787 2 года назад

That's true, it would nicely vary your drill press RPM. HOWEVER, you will NOT have the power and torque that you would have by switching the belt pulley ratio. So that's fine if you're running small bits or drilling soft material if the bit is bigger. If all you're doing is running 1/8 holes into plastic sure you can just turn down your power. If you're trying to run a 1inch paddle bit through oak.... just change your pulley. This method is not a remedy for laziness by ANY means. Period

@Peteworth 7 лет назад

Wow thanks, this is something I've been waiting to buy at an estate sale or second hand because it costs so much, but is a great tool to have for safety's sake and testing high powered stuff.

@electronicsNmore 7 лет назад

Great for testing. Get it while you can. The deal may not last. Glad you enjoyed the video!

@stevedonovan9265 5 лет назад

Thank you much for this, i just bought one off ebay including ship for $61.00 and this is very encouraging and informative. I'll be sure to open mine up and do any necessary touch up. Great video thanks again.

@electronicsNmore 5 лет назад

Thanks for watching Steve! Be sure to look over my extensive video playlists for other great videos of interest to you and share.

@sibalogh 7 лет назад

This is good. The only thing, if you wanna fiddle with, maybe the fuse as you mentioned, and don't worry about the solder on the switch but rather the brush tips should be flattened to the full width to make them wear slower and, above all, more linear in control...

@keitha.9788 3 года назад

I bought this exact same unit a couple of months ago. It works great.....

@electronicsNmore 3 года назад

Good to hear! Mine still works great too. For the low cost, you really can't complain.

@PThumper361 6 лет назад

Well done. Thanks for sharing !!

@electronicsNmore 6 лет назад

Thanks for watching! Be sure to check out my video playlist below for other great products of interest to you, and share my channel with others. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QMdeu9GhTT0.html

@lynnnash4576 7 лет назад

Thank you for this the one that I had for years got lifted at this price I had to purchase it. Thanks again

@electronicsNmore 7 лет назад

Lynn Nash Smart move, you'll like it as much as I do. Be sure to rate thumbs up and share. Thanks

@lynnnash4576 7 лет назад

but of course, blue hand is showing I used your link and coupon and it is on its way. I will pass it on to a few tech friends. I can't believe you got some thumbs down on this I guess they do not understand the use for one. Haters gonna hate oh well

@electronicsNmore 7 лет назад

Unfortunately there are a small number of Trolls/Degenerates on RU-vid. There's ZERO reason to rate the video down. Nothing but spite work.

@thespiritof76.. 5 лет назад

I have one from the 50's made by GE with a Bakelite housing that had a service life of over 60yrs and still works perfect.. the inside of this one looks every bit the quality of my GE... I would expect the same service life from this product as well!

@electronicsNmore 5 лет назад

The old stuff is good. :-)

@alexandreesquenet3736 4 года назад

Excellent review!

@electronicsNmore 4 года назад

Glad you enjoyed it!

@yareps 7 лет назад

Purchased! Thanks!

@electronicsNmore 7 лет назад

A Frend Be a fool not to at that price. Thanks for watching!

@EsamoKoram 7 лет назад

Cool design

@ZenithClarity 7 лет назад

Been wanting one for a LOOOOONG time. You just made me jump.

@electronicsNmore 7 лет назад

Great to hear. :-)

@brit1066 7 лет назад

What a TERRIFIC presentation, One off the best I have seen, clear precise with VERY LITTLE REPETITION.

@electronicsNmore 7 лет назад

Thank you!

@brit1066 7 лет назад

You are welcome, in so MAN, MANY of these kinds of reviews the reviewer has no idea what they are talking about, but they cotton on to something they think is important and they REPEAT and REPEAT and REPEAT the same thing over and over again. To the point were I feel like screaming "I hear you, I've got it don't say it again". I am a retired Cisco, HP, 3Com, Honeywell, Silicon Valley startup engineer with perhaps too much time on my hands. This variac looks terrific, I have always wanted one and I would love to buy it but my wife would simply say "what on Earth have you bought that for" and I would make my usual weak bleating response "It's a toy".

@electronicsNmore 7 лет назад

For the money, it's a great deal. It was originally listed for 50 bucks, but they sold out fast and the price went up to $74.99, which to me is still a great price for what it is. Now it's showing $169, no way is it worth $169. For $169 I'd expect much higher quality switches, connections, and voltage meter.

@spaceted3977 Год назад

I've just got a 240 volt digital 0 to 2000 watts and I' m really pleased with it !!!! The dial and the digital display aren't accurate so you need a volt meter !!! Mine has a UK 3 pin plug on it !!!!

@Magneticitist 4 года назад

I recently got a little 500VA unit that's nice for $50 but damn the one you got was a steal

@electronicsNmore 4 года назад

If you wanna see a major steal, watch my other video below. :-) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-oI-md8dRAbo.html Thanks for watching!

@camurgo 5 лет назад

Very cool!

@electronicsNmore 5 лет назад

I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thanks for watching!

@toddanonymous5295 7 лет назад

Another great review E&M. I wonder if in the future we will see you remove the small voltmeter and replace it with one of the small cheap Chinese digital ammeters. Would be an easy mod if everything fits in the enclosure. I find an ammeter is the most useful measuring device when using a variac.

@electronicsNmore 7 лет назад

No, I'm happy with the modification I made to the analog meter. The accuracy is very good now, but I may add a ammeter. :-)

@pollydor07 6 лет назад

THANKS

@danielthechskid 3 года назад

I just picked this model up locally for $20. I was expecting an inefficient humming monster that doubles as a hand warmer but was pleasantly surprised that it is silent and only draws 8 watts no load per a Kill-A-Watt meter. Also the trouble with any electrical gear like this is that you can get along seemingly fine without one, then you do get one and now realize that you need at least 3 of them. One in your test gear arsenal, one to take with you for various tasks on the go, and a third (or more) that gets semi-permanently hooked up to a specific tool or appliance.

@westbay5858 3 года назад

Where did you buy it from?

@yareps 7 лет назад

Ha! After thinking about this, I bought another one! Darn you, and darn Banggood!

@electronicsNmore 7 лет назад

LOL. Sell it to another person.

@ourlifeinwyoming4654 3 месяца назад

Great video. I have a question for you please: They make a 500W version (120v) - I'd be using it for guitar amps that have a rated output of between 18W and 30W. Am I safe to assume that the 500W version would be fine? Thanks!

@D_J_R_S 7 лет назад

Thanks, matie. Regular price was like $140. Great deal at 50.

@electronicsNmore 7 лет назад

Vegan Beef You're welcome!

@anismahmud3636 5 лет назад

good explanation

@electronicsNmore 5 лет назад

Glad you enjoyed the video! Please share.

@Luke-12V 2 года назад

Hello, I read that measuring with an oscilloscope, you need an amplifier, you need galvanic separation, I ask from what point of view, when today's amplifiers have only 2 wires. Thank you for any knowledge

@canningpark 7 лет назад

There is 2 output in the front panel u can actually modified one of the output to DC with a good rectified circuit since there is some room inside the variac, also u can replaced the volt meter with A digital display for easy viewing! Nice video though thanks for sharing! ;-)

@electronicsNmore 7 лет назад

Thanks for watching!

@54tristin 4 года назад

How can you monitor change in rotational speed at different voltages?

@electronicsNmore 4 года назад

You'd need to use the inexpensive tester below, then you'd be able to mark the variac dial to show the speed. bit.ly/3aCptbK

@thespiritof76.. 5 лет назад

Maybe someone could answer a question for me... This will only work well as a speed control on "Brushed" motors? I have two Hazard fart "brushless" motors and it doesn't work quite the same on those... hardly get any speed control and the motor starts to heat up after a few mins of use... I believe the brushless motors are induction motors..

@luisadrianomeusparabens6863 4 года назад

Parabéns belo regulador gostei

@electronicsNmore 4 года назад

Obrigado por assistir!

@richardmangi9367 4 года назад

I saw where they built a Lichtenburg wood burner from a microwave and they used a variac but it did not say if the transformer was plugged into the variac or the leads from the transformer were connected to the variac and then leads from the variac were used to burn the wood. Can you help?

@electronicsNmore 4 года назад

I know nothing about that burner.

@uptownphotography 2 года назад

Do you think the digital display models will be more accurate with reading the voltage? Thanks. Phil NYC Area

@electronicsNmore 2 года назад

Funny you said that, I replaced the analog gauge with a digital. It was only 10 bucks.

@uptownphotography 2 года назад

@@electronicsNmore How does the digital stack up? More accurate? Thanks. Phil

@fostexfan160 4 года назад

Could I use this to gently powerup the filter capacitors in a guitar valve amp? This is rated at 2 amps but from what I've read the suggestion is a variac rated at 8 amps is the one to get.

@electronicsNmore 4 года назад

Not sure about the use, but the unit shown in this video is a 2kVA, it's well above 8 amps.

@peteb2 7 лет назад

I've personally found that Chinese product crimped terminals are more like the things are flat-squashed as if hit with a hammer than metal crimped. I have seen really bad over heats because of this kind of thing as it forms a high resistance.. On this variac i'd be re-terminating the yellow 'wiper' wire using a quality copper spade terminal at the wiper mech and redoing the actual Earth wire terminal plus giving it its own anchoring point screw, nut, and shakeproof washer onto bright cleaned steel (scratching the paint back). I looks as though the Earth chassis/body connection is via one of the cover screws...

@electronicsNmore 7 лет назад

Yes, those ideas are good, and when you only spend 50-75 bucks on a variac like this, you have to expect to do a few minor corrections. If I was spending $150 - $200, I would want a perfect, high quality unit out of the box. Thanks for watching!

@dohndunmire5603 6 лет назад

Great video but where does the in and out grounds go??

@electronicsNmore 6 лет назад

The AC ground wire is connected to the receptacles and metal housing. Thanks for watching! Be sure to check out my "Product Review" video playlists for other great products and discount codes.

@jerrybonbonifacio6970 2 года назад

hi , is that variac transformer is Isolated (transformer) ?

@pmgriphone 5 лет назад

What is the DC resistance and inductance of the coil in this unit?

@electronicsNmore 5 лет назад

Couldn't tell you because the unit is in storage due to moving.

@davidchavarria 5 лет назад

I know I’m a year late but, can this be used for troubleshooting equipment

@electronicsNmore 5 лет назад

It can be helpful, but I like the load lamp. :-) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-zrbxpUfa27U.html Be sure to look over my extensive video playlists and share. Thank you!

@yz250ftony 7 лет назад

If max (safe, continuous) current draw from a wall socket is 15 amps, how do they figure 2,000 watts @ 120v? Maybe I'm missing something? Regardless, good video!

@electronicsNmore 7 лет назад

Small appliance circuits in your home are 20A circuits. :-) Thanks for watching

@sincerelyyours7538 6 лет назад

It's now $169.99. Better wait until after the holidays. If the price doesn't come down then skip it. I got a 500VA version for about $80 last spring. Serves my needs adequately enough, but watch for loose parts. Also, the weight of such a small box is deceptive to shippers (they're liable to drop it if not careful) and the box mine came in, as well as the flimsy styrofoam packing inside, were pulverized to pieces.

@electronicsNmore 6 лет назад

Actually $152 shipped......using the coupon code provided.

@jesselevine0 5 лет назад

I know this is a late comment, but could you tell me what the difference between "fast blow" and "slow blow" fuse and why it makes a difference?

@electronicsNmore 5 лет назад

Hi Jesse. A slow blow fuse is used for inductive loads(motors, transformers, etc) that have high start up/inrush currents. A fast blow is for resistive loads(Non-Inductive) loads. Hope you understand now. I have many videos on my channel that cover a wide range of subjects, so be sure to look over my video playlists below ,and most importantly share my channel with many others. Thank you! ru-vid.complaylists

@ronbianca1975 2 года назад

Hi, How does this Variac affect the torqe of the motor it is controlling? Keep up the good videos!

@electronicsNmore 2 года назад

It will only work on electric motors without start/run capacitors.

@54tristin 4 года назад

Will it slow down turntable speed?

@electronicsNmore 4 года назад

Probably not. The motor for the turntable probably uses DC.

@ovalwingnut 4 года назад

Better quality than I would have guessed BUT... I can't shake off the heebee geebees. Been bit way to many times from our far east friends

@electronicsNmore 4 года назад

It's currently the best deal out there. Wait until you see what I upload next week. :-)

@trench01 7 лет назад

I was expecting to see a car running on vapors as the last post comment we talked about. Nice Variac Autotransformer. But only 8 hours? :| what happens after that it shuts down? Are the wires strong enough to last the test of time? Since most of the time they make electronics with cheap material and sometimes best to replace some components (maybe the wire on the wiper as well) to last longer to be more durable. It shows that you need to fix some things since even the meter needs adjusting. lol But still nice. Try a light bulb and see how bright it goes. Not the led or fluorescent since it might mess up I feel. I am also wondering what would be the first component that breaks on this device. hmmm

@001desertrat3 7 лет назад

Trench - After 8 hours it lets the Smoke out. Then you have to buy ACME replacement Smoke (good luck trying to find that) .

@electronicsNmore 7 лет назад

Never heard of "Duty Cycle"? Some equipment is rated for "Continuous" use, and others not. You want continuous use? Very simple, install a cooling fan. LOL

@trench01 7 лет назад

again can you show how to run a car on vapors since you say its simple? Thanks

@electronicsNmore 7 лет назад

There's nothing to show, everyone knows gas vapors can run an engine, so it's a waste of my time. There are already many videos showing this on Youtuibe, you need to refer to those videos. In the future, being pushy(by saying "again") will not get you anywhere with me. One simple request is all that's required. The rest is up to me if I want to do it or not.

@trench01 7 лет назад

But every mechanic I asked says it can not drive but only run an engine low so in short they say no its not practical to use they say. But Sorry for the bother again.

@darylhawkins4658 4 года назад

I’m down in Mexico and need something the buck the line voltage, I’m seeing 138Vac. Will this work?

@electronicsNmore 4 года назад

Yes, you can set the output voltage at 110-120v.

@darylhawkins4658 4 года назад

Thanks for responding. I’m traveling in a camper in Mexico soon to be crossing back into the states. I need something that can boost as well as buck the line voltage. In Mexico the power down here is poorly regulated, there’s essentially nothing wired to any sort of electrical code. Do they make a 30amp version of this product? Or would you recommend some other device?

@electronicsNmore 4 года назад

A similar version is the 3000kva unit. The price is reasonable, but you will need to connect a 12ga power cord to the unit. A 12ga appliance cord cut in half is ideal. The plug side connects to the left side of the unit(input), and the receptacle side(output)to the right side of the unit. amzn.to/3682umV (Affiliate Link)

@Ni5ei 12 дней назад

Does anyone know why there's always such a huge gap between the unit and the dial? It looks like they saved money by not cutting the shaft to the right length.

@jefflawson21 5 лет назад

Is it possible for me to get a variac for that price? Please tell me where to even look.

@electronicsNmore 5 лет назад

Deals come and go.....

@rainman50 2 года назад

What Brand is this variac? I looked on Amazon snd it gives different brands with the same model number. Xinwoer and Acogedor and Mophom. Does it matter? One haves it for $230. And another $94

@electronicsNmore 2 года назад

Unbranded. If it looks exactly the same, then it is.

@fkfnc3858 Год назад

@@electronicsNmore Is this the same for other Chinese products also and do all come from the same factory?

@gweliver 7 лет назад

This variance only shows up as $169? Doesn't let me "click" on US and nowhere that asks for the "Coupon Code"? Can you offer any advice?

@electronicsNmore 7 лет назад

Hi Gary, a bunch sold when this video came out, 21 to be exact. I'll speak to the supplier to see if more will be coming. Thanks for watching!

@electronicsNmore 7 лет назад

If you're a subscriber, make sure you click the bell so you're notified when I upload a video. You need to be quick with certain deals.

@electronicsNmore 7 лет назад

Gary Weliver Hi Gary. As a result of very strong demand, Banggood's incredible deal at $52 shipped didn't last as expected. The new price using the supplied link and coupon code is still a great buy at $75 shipped. Cheapest online. Thanks

@apurvsharma1261 2 года назад

how to find va rating of a transformer

@ericlunneborg907 2 года назад

What's the brand name of this particular autotransformer? I see some knock offs that are cheaply built. This one looks rather good. Thank you again.

@electronicsNmore 2 года назад

Not sure if there is a name, but I still have and use this variac.

@bsul03420 5 лет назад

The use of a glass fuse is extremely dangerous : it should be a ceramic bodied HRC fuse. Under short-circuit fault conditions, the fusible element will vaporise and deposit a conductive film on the glass, which will continue to conduct the fault current and cause the fuse to explode.

@electronicsNmore 5 лет назад

I wouldn't say "extremely dangerous", but you do mention valid points. It doesn't happen all the time when a fuse blows, but to eliminate the chance, ceramic fuses filled with sand are used. Even if the deposited metal continued to conduct, the extremely thin layer cannot handle too much current. The glass would also heat up and crack open, not explode. Thanks for watching!

@bsul03420 5 лет назад

electronicsNmore Maybe the higher distribution voltage we have in Europe makes for a worse situation. Early in my career I was carpeted by my boss for using a glass input fuse on 220 volt equipment - he told me in no uncertain terms to go and look up the maximum voltage rating of the fuse. I can't remember what it was, but it was nowhere close to 220 volts. It was a lesson I never forgot!

@michel333100 4 года назад

Hi, My name is Michael Newell from Niagara Falls, Ontario, Canada. I have a question for you. I recently bought one of these variacs. Mine is the SC-5M model 5A at 500 watts, it says on the casing. My question is this. I heard people on the net say that these Chinese variacs are not very reliable. Mine cost $209.00 shipping included. Seems high compared to Ebay and Amazon. I was intending to use this with my guitar amps to lower the voltage slightly. My amps are 35 watt amp and a 40 watt Fender Blackface Bandmaster vintage amp and a 50 watt amp. Having something reliable is paramount with these amps. They very expensive. I've seen one video where a guy had to add an extra gree n wire to properly grond one of these units to the actual chassis. What can you tell about the reliability on these units? Mine is a 5 amp unit. Does it absolutely have to have a slow blow fuse? To run my guitar amps, I really need exactly 5 amp fuse. My amps are use a3 amp fuse and a 4 amp fuse for the 100 watt amp. They are slow blow always in guitar amps. I noticed that you lowered your fuse by 5 amps in this video. Could I just replace the 5 amp fast blow fuse with one of the same rating , only slow blow?Thanks Michael Newell from Niagara Falls

@electronicsNmore 4 года назад

Just make sure the unit is properly grounded. Trace the power cord ground into the unit, make sure it's connected to the metal housing and the receptacle ground. All inductive loads(motors/transformers/etc) require slow blow fuses to handle the start up current.

@michel333100 4 года назад

@@electronicsNmore , Hi, I opened this housing of this variac from China. From what I can see, the ground wire goes from the AC wire to the input receptacle of the units ground , but there is no second wire going from the AC wire to the actual chassis. I'm just wondering about this. It seems to me that the AC wire ground goes directly to the ground of the input receptacle on the unit which I would assume grounds anything that you plug into this variac. Like I was saying before, this other guy on RU-vid said that he added an additional wire from the AC wire ground to the actual chassis. Is that really necessary? I would think that they would not sell this in the US or Canada if there was a danger to get electrocuted by touching the housing on the variac.please let me know if this absolutely must have an additional wire connected to the chassis. Thanks Michael Newell from Niagara Falls, Ontario, Canada

@sjWiz 3 года назад

My devices use 30A fuse. Can I still buy this?

@electronicsNmore 3 года назад

This unit can only handle 2000W.

@sjWiz 3 года назад

@@electronicsNmore Ok, my devices max out at 500w but how does this relate to 30A fuse in my devices?

@Adrenalinefiend22 3 года назад

The lower the volt the lower the watts as well?

@electronicsNmore 3 года назад

The unit is fused, so you can't supply more than the fuse rating.

@Adrenalinefiend22 3 года назад

@@electronicsNmore If I hooked this up to a fan that runs 500w & turn the volts down to half will the watts drop down ?

@mooddy_bad5260 7 лет назад

try to make a video about how to make 220v from 12v

@electronicsNmore 7 лет назад

Already have videos for that. Instead of using a 110v transformer as shown, use a 220V transformer. Refer to my video playlists.

@yusdiy 6 лет назад

the 230v is USD100 now.They dont ship to my country.Any other links for a 50 dollar 240v version.yes I'm late.

@electronicsNmore 6 лет назад

Best deals are in the video description area.

@mgtow-extraits 7 лет назад

ok, but what is it useful for, apart from slowing down a drill?

@electronicsNmore 7 лет назад

:-) www.circuitspecialists.com/blog/ten-uses-for-an-autotransformer-or-variac/

@andrewwhite1793 7 лет назад

electronicsNmore But don't use it for cutting Styrofoam, the output is just as dangerous as the mains supply! It is also used in design of electronic equipment to see what happens if the mains goes above or below its nominal voltage and to make sure systems shut down properly if there is a brownout.

@mgtow-extraits 7 лет назад

+electronicsNmore > ok, very specific usages i see, thanks.

@electronicsNmore 7 лет назад

It's amazing how fearful people are of 120V mains. I've handled it for many years, and gotten my fair share of accidental shocks, and guess what? I'm still here.

@andrewwhite1793 7 лет назад

Different people have different skin resistance. What you can get away with might be fatal for the next guy. Or maybe you are leaning against something that is grounded...

@maff909 4 года назад

Just long enough to watch while I sneak outside and smoke a doob 👌

@electronicsNmore 4 года назад

😂

@waderyun.war00034 5 лет назад

I have one of those mine cost around $70. Couldn't find one any cheaper.

@electronicsNmore 5 лет назад

You did good at $70!

@arthurmead5341 4 года назад

They're like 35 on ebay

@1959Berre 6 лет назад

I don't like that curled wire connecting the wiper on top. It should have been two circular rings sliding over each other. Besides, check the solder connections. Those wires should be attached mechanically (through a hole) and soldered. If ever the solder melts or breaks loose, the wire should stay in place. This would not get UL approval.

@SmeeUncleJoe 4 года назад

Sure was a great deal. I can't find these for less than $150 now !! bummer. I'm poor.

@electronicsNmore 4 года назад

Yes, the price shot up.

@PeterDad60 4 года назад

E-Bay = $65. Amazon = $84 on 11/30/19

@SmeeUncleJoe 4 года назад

@@PeterDad60 $128 plus taxes includes shipping on Ebay. $87 + 15 + taxes on Amazon. .... I'm in Canada.

@saddle1940 7 лет назад

Nice purchase but shouldn't those connections inside be crimped or at least shrink wrap covered not just bare soldered? Maybe cable tied back as well. The carbon wiping brush, doesn't that design cause at least one turn to be shorted?

@electronicsNmore 7 лет назад

Hi Stephen. The connections inside are fine as is. No reason to cover them, since they cannot be moved around to touch anything(ground), and no fingers can access the area with the unit fully assembled. The brush design is VERY common. Many variacs span 2 turns like this unit, some even span 3! The reason why you don't have a problem with shorted/burned windings, is because the carbon/graphite brush acts like a resistor. The larger the space that electricity has to flow across the brush, the resistance will be higher. When the brush makes contact in only one area, the resistance will be extremely low. Thanks for watching!

@saddle1940 7 лет назад

Thanks for the reply, but the active connection on the mains switch is side soldered onto the switch. Regardless of whether or where this is the norm, it should be crimped, covered and pushed onto the switch. Minimum would be wrap soldered, twist soldered or splay soldered and then covered or even just covered would do more than this. That switch will flex as it's turned off and on and having seen lots that have gone bad, that connection is very suss. My guess would be, it will break in the long run and float in the box. The earth connection is ganged from the incoming cable to the mains sockets then run from there to the case where it seems to be pressed under a bolt between the inner and outer casing which is isolated from the metal by paint. hard to tell from the video if there is a star washer in there to eat a bit into the metal. The front panel is not metal to metal connected to the rest of the unit as it's powder coated as well. The earth should go to a bolt (without paint under it) on this panel first. Sorry, but there'd be several things needed to be done to this before it'd be allowed in this workshop. Sad part is, it wouldn't take long to do.

@electronicsNmore 7 лет назад

LOL. You're extremely picky for 50 - 75 bucks, and paranoid. If those things bother you that much, then buy one and spend 15 minutes making the changes instead of complaining.

@saddle1940 7 лет назад

I've been bitten too many times by the dark lord that lives in that socket in my wall. In this country, he comes with 240 teeth and zero mercy. The complaint was to point out why it's $50 to $75 and why you should be cautious. Only you can decide which side of a dead versus cheap scale you'd like to sit. Picky? I didn't even start on other things like the "Really, a switch with live and neutral in it before the fuse?". Those 15A switches have a habit of flexing enough to loosen the side pivots (sometimes they just break) and allow the rocket to come out which allows the middle fulcrum bar and spring/ball out of the seasaw. ;-)

@saddle1940 7 лет назад

Sorry for the rant, I'd like to think I'm not normally this vocal.

@pierrejeanes 6 лет назад

WHY THE WYPER HAS THA SHAPE?

@electronicsNmore 6 лет назад

It was designed that way for smooth rotation, and to ensure that no more than 2 wires are touched.

@williambelr 7 лет назад

It would be nice to have a deal for canada, 170$ US is a little pricy..

@electronicsNmore 7 лет назад

William Belanger I agree.

@electronicsNmore 7 лет назад

The price has dropped again. $75.99 shipped from the US warehouse. Don't wait because the price is still unbeatable.

@jmbuchela5424 5 лет назад

I bought it , great deal for the price, nothing to bitch about

@electronicsNmore 5 лет назад

Yes, for the money it was a great deal. Thanks for watching!

@TheMonkeyseeker 7 лет назад

I paid over 200 bucks Canadian years ago for same one

@electronicsNmore 7 лет назад

TheMonkeyseeker Wow, that was pricey.

@JUANKERR2000 5 лет назад

The fuse holder is wrongly wired; the incoming supply should go to the end connexion.

@electronicsNmore 5 лет назад

No, it's fine. The variac is protected by the fuse after the power switch. The power switch has an internal light, which allows the user to know if power is being delivered to the variac by the receptacle even if the fuse blows.

@JUANKERR2000 5 лет назад

@@electronicsNmore You missed the point! With the supply going to the fuse terminal nearer the front panel rather than the rear of the fuse-holder there is a risk of receiving a shock should you be unfortunate (careless?) enough to fit a fuse whilst the supply is on as the fuse will make contact with the supply when the other end of the fuse has not yet entered the holder. No matter how careful one is there is always the risk of a moment's lack of concentration leading to an unpleasant shock even at your mains voltage. :-)

@electronicsNmore 5 лет назад

It makes no difference. The lower blade is not close(As it may appear) to the sheet metal and the fuse holder is solid plastic.

@JUANKERR2000 5 лет назад

@@electronicsNmore O K, thanks. :-I

@nicmost3044 Год назад

Graphite brushes, 17 June 2917 video. Everybody makes the mistake calling it carbon. Last pure carbon brushes where made in the middle of the 20th century, modern brushes are made of Graphite, with a little carbon for hardness.

@54tristin 4 года назад

When this thing gets hot the glue wmay melt and when you press the control your finger will go right into the unit

@electronicsNmore 4 года назад

Hi there. No, there are locking tabs. :-)

@quadflopper1012 7 лет назад

what happened to the $76 good deal price, it's up to $170 now. typical banggood, introduce at really good price then jack the price way up after it's been reviewed on youtube!

@electronicsNmore 7 лет назад

Quadflopper101 I agree....that $169 is way out of line. No idea how the price went from 50 bucks, to 75, then 169. Not worth $169, but up to $75 bucks...yes. For $169 I want a top of the line unit.

@jeffsansoterra7743 6 лет назад

I think the $169 dollar is if you choose the Canadian warehouse. Choosing the US warehouse still shows the lower price.

@ketelin4285 3 года назад

@@jeffsansoterra7743 Definitely not this time , it's over 100 euro's in Europe . I can get a 3000w unit locally for 20 % less than what Bangood asks for this .

@deathincarnatesplace 4 года назад

aye turn that into a 320 amps alternator and then put eight plugs on it. and you got my friendship are just making a big resistor to make me pay more money because that thing has heat loss.

@arconeagain 3 года назад

I just bought this exact unit (except it's 240v) and it blew up in 3 seconds flat. As I dialled it up about a third of the way, it made a bang followed by a plume of smoke. On inspection it is a very poorly constructed device. That exposed wire (the 120V active connection to the enamelled winding) is a hazard. Why could they not have put some sort of insulative material here? The case is flimsy and could easily buckle inward during transit (this is a heavy item, mine was in the exact inadequate packaging) which potentially makes this variac a shock hazard. I say this because I also noticed that the ground wire and lug is inadequately connected to the case as it is between two layers of paint. This surely does not meet Australian Standards and is a great example of the inferior products that China swamp our shores with. You should not be endorsing this widow maker in any way shape or form.

@electronicsNmore 3 года назад

Many have bought the same device, and zero problems. My unit still works perfectly to this day. The version in the video is 120V, and you saw the inside of the variac. Clearly yours was defective, and I also have no way of knowing who made the unit, because they all look very similar. I'll agree with the housing being a little flimsy, but you cannot expect tick steel for the very low price. Sounds like the housing was dented in where the wires were soldered to the winding.

@wallychambe1587 3 года назад

$92 in 2021!

@electronicsNmore 3 года назад

That's the best price right now. Shipping fees have gone up.

@DoRC 7 лет назад

$170 now.... Bang good is great at jacking up prices of a popular item....

@electronicsNmore 7 лет назад

Only on this item. It's not worth $169, but $50 to $75, absolutely. I have no idea how they arrived at that price.

@DoRC 7 лет назад

electronicsNmore eh. I've seen them do it time after time. They send someone a thing which is at a great price people start buying it and then the price goes up. I wouldn't be surprised if they have an algorithm that automatically adjusts the price based on demand.

@emostorm7 4 года назад

$94 now

@electronicsNmore 4 года назад

Cheaper with the coupon code.

@doorguner01 7 лет назад

That is a bargain!

@electronicsNmore 7 лет назад

terry jenkins Don't snooze on this one, otherwise you'll lose.

@doorguner01 7 лет назад

electronicsNmore but i really don't have a need for one! so i guess i snooze!

@electronicsNmore 7 лет назад

terry jenkins In that case, you're exempt. :-).

@doorguner01 7 лет назад

electronicsNmore is it possible to use a incandescent light bulb to snub out voltage spikes that could cause damage to my plasma cutter from a unregulated generator ?

@electronicsNmore 7 лет назад

terry jenkins Don't like the idea of an unregulated generator....

@OhannesKamerKoseyan 7 лет назад

I guess you meant 2kVA, not 2000 on the name of the video.

@electronicsNmore 7 лет назад

Ohannes Kamer Köseyan Yes, you're right. Correction made. Since this is AC, the wattage will be a little lower than 2000w. Thanks for watching!

@mikec9537 6 лет назад

Variac was actually a brand name owned by General Radio...for some reason all auto transformers are called variac's?????

@electronicsNmore 6 лет назад

Yes, the name stuck. :-) Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel with your friends. Thank you!

@dedskin1 5 лет назад

by the way you change the Torque with Variac not speed, speed is changed because your drill is bad , speed is controled with frequency not Volts , im not an expert , didnt do it , but the way i understand it , yes wrong way to do it, may be cheap way but wrong, get alight bulb dimmer do the same for few bucks , i dont understand this really , but your money right

@electronicsNmore 5 лет назад

Clearly the lower voltage causes the motor to spin SLOWER, and higher voltage FASTER. The motor is designed for 60HZ, using other frequency power sources will cause the motor to overheat. There's nothing wrong with the China made Variac, especially for what I paid. If you don't have nice things to say, then please look for another channel.

@dedskin1 5 лет назад

yes and you control the speed of internal combustion motor by driving more compression or fuel in it , no you need to adjust fuel injection that is how it works otherwise its a bomb , not a motor , so read if you need to , i know how it works , you and others dont , so you need to read this i dont en.wikipedia.org/wiki/Variable-frequency_drive

@dedskin1 5 лет назад

im explaining you what you are doing , but you dont seam to get it . Frequency =Speed , in AC motors , Voltage =Speed in DC motors , you just did an experiment , like most Scientist do, and you got your results , and you say Voltage Equals Speed, WRONG . Practical Example #1 Setup a Motor to drive another motor as a generator , and change its speed with that variac observe the output frequency ! (Answer: The number of poles (magnetic poles) and the rotational speed determine the output frequency: Freq = Engine_RPM * Number_Of_Poles / 120.) Practical Example#2 : DRONE Motors . do they have variacs in them ,no they dont , build one , or use just a motor , same result , change its speed , and observe how you change it with voltage or frequency? ( result Frequency) Conclusion : Voltage assuming constant Current =Torque , Frequency =Speed in AC motors , in DC its Voltage =Speed , Current =Torque there is no Frequency involved . If you dont believe me , feel free to challenge me with a practical Demo , and if im wrong call me an idiot, in front of everyone , link my channel , link my posts , say this man is an idiot . Or read what i said but with care , to learn and know how stuff works , if you care , if not then i write this for others since ive seen 10 videos doing exactly the same , and Argument with Motor Controllers Seller, thinking he has best Motor Controllers , but guy has no clue what he is selling , he asid Light Bulb Dimmer is Motor controllers , there you go, what can one say to him . i cant explain this to each and everyone . so im gonna leave it here , wasted 20 minutes writing this hope you care , if not , the f it .

@bactrong1611 5 месяцев назад

I would like to ask, does this machine operate on an electric motor with a start/run capacitor?

@nicoleh7100 6 лет назад

Haha

@deathincarnatesplace 4 года назад

where do we buy these things in 2020 dude. damn man gimmie right now because it is useful but not a va step up generator.

@electronicsNmore 4 года назад

Links are posted in the video description area.

@nicoleh7100 6 лет назад

Haha，we have all type variac transformer

@maidsandmuses Год назад

Beware of these cheap chinese units; they fail a few safety aspects: 1) fused only on the input. A variable auto transformer like this needs _two_ fuses, one on the input as shown (optional) but _definitely_ another one also on the _output_ ; the output current is the one likely to be higher and needs to be fused to the safe current rating of the transformer. 2) that coiled cable around the spindle is a very unsafe and cheap construction method and likely to fail at some point; a safe variac uses a slip ring contact for this. 3) the single pole On/Off switch wired as shown is only safe for countries where the outlets have a known neutral/live configuration and the plug cannot be reversed. If this variac is used in a country where the plug can be reversed (e.g. The Netherlands / Germany etc) then there is a danger that the switch breaks the neutral rather than the live and the output will then be at the full 120V or 240V live voltage even with the switch off. One would hope that for those markets the unit is sold with a double pole switch. TBH the use of an auto-transformer in countries where the live & neutral orientation is an unknown is ill-advised; use an isolating variable transformer there (rarer, but they do exist).

@felixcat4346 7 лет назад

Don't buy a variac. Use an ebay thyrisor for a light dimmer combined with a light bulb to detect shorts. After all you use a variac to detect shorts on equiptment under test.

@electronicsNmore 7 лет назад

Joseph Nicholas People use variacs for MANY reasons, what you stated was only one.

@electronicsNmore 7 лет назад

www.circuitspecialists.com/blog/ten-uses-for-an-autotransformer-or-variac/

@ZenithClarity 7 лет назад

Besides the ten uses on the link a variac can also be used for wire heating plastics sheets to create bends.

@lesstime1678 5 лет назад

made in china

@electronicsNmore 5 лет назад

Yes, just like 90% of everything you own. Your point is?

@ClownWhisper 4 года назад

The reason why I was so cheap is it was made in China by kids sweatshops

@electronicsNmore 4 года назад

Just like almost everything else in your house. LOL

@ClownWhisper 4 года назад

@@electronicsNmore no sir not mine. I make a concerted attempt to buy whatever I can from us manufacturers or suppliers I don't care how much more I have to pay At times there is no choice but at least I do my be ssd's t to try

@electronicsNmore 4 года назад

@@ClownWhisper Whatever you say. LOL

@pollydor07 4 года назад

THANKS

@electronicsNmore 4 года назад

You're welcome!

@pollydor07 6 лет назад

THANKS

@electronicsNmore 6 лет назад

You're welcome!