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500VA Variable Voltage Transformer
Transform your voltage with precision and peace of mind! Our variable voltage regulator offers a 0-130V adjustment range, fuses, a thermal control switch, a resettable overload protector, delivering a steadfast power supply.
Effortlessly adjust your electrical devices with infinite precision using the top-mounted voltage adjustment knob. Dial in the exact voltage you need, anywhere from 0-130V, for precise power delivery tailored to your specific requirements.
No worries if a fuse unexpectedly blows! We've got you covered with 4 extra fuses included, making replacements a breeze. Keep your equipment protected without skipping a beat.
Our variable voltage regulator is armored with built-in copper coils, shielding your devices from voltage fluctuations like a fortress. It ensures your equipment runs more reliably, safeguarding against any electrical interference and keeping your operations smooth and secure.
Our variable voltage transformer is perfect for any setting—home, industrial, or office. It ensures your devices operate under stable voltage, tackling issues of inconsistency head-on.
Outside In
2025-09-06 11:51:12
I ordered this because it was a better price than I thought it would be, so wasn't so sure the quality would be as good as the price, but wow was I wrong. This Transformer is incredible - Heave Duty and sturdy, and also heavy :). I also replaced the analogue meter with a digital one as the analogue meter was not very accurate, plus I wanted to be able to see a digital representation instead anyhow. It is a great addition to my bench and happy to be able to finally own one for my workshop.
Timbalionguy
2025-08-27 14:34:36
I needed this to test several audio power amplifiers that suddenly showed up on the bench. It worked as expected and exceeded expectations for performance. A good value for the money!
bgwp
2025-08-14 14:13:58
Works perfectly! Looks well built and has a heavy transformer. Sweeps through the voltages without any issues.
Gutch220
2025-06-28 17:44:58
It works exactly as it should but just do yourself a favor and ignore the gauge/wheel on top that shows the output voltage. This gauge is useless since it doesn't take into consideration the voltage from the source (your wall socket). If your original voltage ranges from lets say 114v to 123, the output will vary at the same wheel position. So just use the front display, it is close enough. I measured the accuracy of the front LCD display with a digital multi-meter and at times it was off a little, but it was OK. The meter was SLIGHTLY higher than the variac from about 0-70v. It was the same from about 70-110v, and the variac measured higher than the multi-meter from 110-140v. Since there are toe parallel receptacles, you can monitor the output with both the display and a separate meter, but they are close enough to where I don't think it will matter. I measured the voltage in my house at 121.6v at a location, then I dialed in 121.6v on my multimeter attached to the variac. The multimeter measured 121.6v while the variac measured 124. Some other voltage readings I took are: (Meter/Variac), 30/28, 50/48, 70/69. 80/80, 90/90, 100/100, 110/112, 120/122, 130/133. The highest readings I got were 143.8/147v. So, overall I'm happy with the accuracy, the build is heavy, all metal, with simple, cheap electronics inside, but for less than $100 you get what you pay for. Be gentle on the wheel up top, as the device is heavy and you will instinctually go to grab the up, but that's the weakest part. Grab/hold it from the bottom or side. Some might say this is cheap, and it probably is, compared to a Staco but this is a fraction of the price and it only needs to do ONE JOB, and it does that job. Just ignore the top wheel gauge. It's useless. It shouldn't even be there since there's a front LCD display. In fact, they should remove it, and use this 'savings' to add a metal handle to the top. If this broke, I would want to know why. If it were my fault, I would buy this again, but it craps out on me, I will look out for a used Staco with two jacks.
D. Sroelov
2025-05-18 16:37:36
the unit does exactly what it is supposed to do. the only issue i have seen is that the meter isn't all that accurate. of course, when you're using one of these, it is always best to hookup a voltmeter to get an accurate reading. these are used to limit voltage, so you want to make sure you are getting exactly what you expect to get.
Mark G.
2025-05-15 15:17:08
I bought this to use with vintage tube guitar amplifiers. Instead of surging power to the tubes I can bring the voltage up gradually to "warm" them up at home. If you are a gigging musician, you know your tube amp has an optimal operation voltage (noted on the backplate info). Power outlet voltage will vary enough for every venue and so will affect your "sweet spot". You can run your amp through this variac and adjust the output to your desired voltage and voila! Same voltage to your amp every gig. It seems to be built like a tank and has endured months of use.
Cal G
2025-05-13 16:44:08
Contrary to some of the other reviews, the unit I received is of good quality internally (soldering etc), and the digital voltage display was within 2 volts no load and within .5 volts with a small to heavy load. On my unit, the dial scale was within 2 volts from 10 volts to 130 volts. Being a very heavy unit and even in a double box, there was shipping damage but it stopped short of reaching the unit fortunately. Very satisfied with the purchase.
J. W.
2025-04-03 20:14:45
I purchased this after reading some of the other reviews... knowing full-well that it may be a compromise. We'll... it is, but for occasional use, I will say it's ok.I am an Electronics Tech, and I have a rare need for one of these, but I did not want to spend a small fortune on one.Some things to expect: The build quality is not the best. Before I used it, I let my curiosity (as a Technician) get the best of me, and I opened the unit to check the wiring quality. EEEEEK!! The unit was obviously assembled by someone racing the clock. The wiring/soldering was bordering on dangerous. I took the time to correct sloppy wiring and soldering. Now I feel MUCH better about using the device.In addition, the dial and front-panel LCD meter are not accurate... especially until you get into the upper range of voltages. I used a high-quality meter to determine the inaccuracies... then used a personal labeler to make the corrections on the dial. I won't rely on the front panel LCD meter in most cases, although it does seem to be pretty accurate up in the "Normal" 110--120 VAC range.I then tested the unit, and it does perform as it should. I would NOT recommend leaving it unattended when using it, especially with higher current levels. (I use a separate meter with a "clamp-on" AC Current sensor. This unit DOES NOT have a "current" meter... only "voltage."
Gary
2025-03-25 14:57:13
item as described. have not had a chance to use yet.
G
2025-03-09 14:07:16
No pense que lo fuera a usar tanto. Se convirtio en parte importante en mi laboratorio para proyectos de CA y como regulador de algunos sistemas.
Tom
2025-01-31 14:55:24
I bought this to control the speed of a large fan- Seems to work well, though I've used it only a few times
Puppy Lover
2025-01-06 15:07:44
When running at 100%, the power would shut off after about 3 minutes, after about a minute it would turn on again, and then would repeat this cycle. I figured out that the high heat sensor was what was doing this. I need continuous power for my application, so I had to return it.
Boris
2024-12-06 18:24:28
It is in the process of being returned and I am waiting for a replacement.
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