VCTVX-79NP Multi-Purpose AC to DC Adapter Voltage Converter 110V to 240V with Multiple DC Output Selection1.5, 3, 4.5, 6, 7.5, 9 and 12 Volts DC - Fixed 1000mA

Very pleased with my purchase. I seldom use it, but when needed, IT’S A LIFESAVER! Plus it’s so nice not having to store a bunch of random cords.

This power Supply delivers great efficiency. Works very well with all major electronics.I used on my Radio and was very satisfied with it. Most power supply's don't have enough watts to run items such as radios with peak performance. This is not the case. There was no problem with the supply running the connected device. Power Supply's that deliver lower wattage will create a hum in products that use audio such a radios.Supply's that run more efficent like this one that have more supplied wattage will reduce the hum to 0.1% or down to nothing. I heard nothing.No Hum. I would recomend it to anyone for use with all devices including radios.

I found an old CD player I wanted to use; however, the adapter was missing and batteries were costing a fortune. I took a shot at this because of the variety of plugs that were include. One did indeed fit the unit and it matched the current (1000mA). The unit has a switch to select the output (ranging from 1.5 to 12 V). It was a little difficult placing the plug on the adapter cord. I assume that is necessary to ensure no contacts are exposed. There were less expensive options if I had known the exact plug-type. This provided me with a range of options for only a couple of dollars difference -- well worth the price to not have to return an item that didn't fit! I am sure I will find other items to use this cord with. My only negative with the unit is that I do not see a UL listing.

When my power adaptor for my stationary recumbent bicycle broke (it was my fault, I was moving the bike with the adaptor on the seat and it fell off) I found an exact replacement which was going to cost me $50.00 with shipping costs and tax. This one, and another adaptor I purchased, worked perfectly and cost me less than $15.00 with my Amazon Prime membership. My son, a computer engineer, told me it would work but I was skeptical. I should listen to my son more often, he knows what he is talking about.

The voltage produced by this device at any setting only has an approximate relationship to the voltage it says it will be produced at that setting. To continue the plumbing analogy that was used in another post, you can think of voltage as the pressure, while MA is the amount of water available from the system. (coulombs of electrons). Household plumbing systems are designed to be run on 45-50 PSI, when I lived up north, and the household pressure regulator would go bad (we lived at the bottom of the hill) the household pressure would go up to 175 psi and we had all sorts of malfunctions, hammering, leaks. I finally installed a gauge so that it could be checked easily after replacing the regulator three times over six years. But this device has no gauge..it has settings which you are supposed to trust, and those settings are not going to produce an acceptable voltage (pressure) for many devices. Too much water pressure could break a pipe, and too much voltage pressure could burn out your electronic device.So the the first thing I did when I got this was: I hooked the output to my digital VOM. It read somewhere close to double or just over double for every range - and that pressure is like, well, bad for your electronic devices. I can find a range my device will work at, so I'm not going to return this, but Jerry had his speakers burn out when he connected them to his device. In his ignorance, he thought it was the fact that 1000 ma (the rating on the device) was too much for his speakers, but the amps won't go unless the volts push them, and when the volts are double, the amps are too. That is what burned his speakers out, the defective voltage indications.When you have a device that puts out double the voltage it says it does, well, the things you hook to it might burn out even if you do everything right. Amps = power/voltage so if your device is meant to run at 6 volts and consume 5 watts, that means that it consumes .83 amps or 830 milliamps, within this device's ratings. That translates to 7.2 ohms impedance. Double the voltage to 12 (unexpectedly, because this power supply does not produce the voltage it is rated at) and you increase the amps to double too, to 1.6, and suddenly that is over the device's rating of 1 amp.Just for the heck of it, I checked my VOM against a new AA alkaline battery, it read 1.54 volts, so the measurement of "double" is likely the charger and not my VOM. It is an Innova 3340a, not a Fluke, but not a bargain basement item either.I then wondered if this was just an artifact of having no load while measuring voltage. No matter what it registered when there was no load, if it went back to the proper output when loaded, it would be OK. I had bought this to run a High temperature(100C) 1L/Min mini DC Water Pump. FDA approval. Ideal for coffee maker or other food process application to circulate water in a sous vide bath, so that the water would be at a more even temperature since I was seeing some stratification especially while the bath was being heated, then I measured the voltage across the pump. The voltage was 5.9, which is perfect for this pump, but I had set the power supply to three volts, so it was putting out almost double the voltage, under load.So I'll echo the comments of another reviewer. If you do not have and know how to use a voltimeter, do not buy this power supply. I wonder if at least some of the reports of overheating are happening because the unexpectedly high voltage causes too much current to pass through the device being powered.

I could not be anymore pleased with this item. It is exactly what I wanted and then some. I would recommend this item to anyone, it is truly a deluxe unit and has many uses. It was a gift for my Mom and she is really pleased with it. If your looking for an adapter this is the one to buy. If your not sure what size you need then buy this one, it has many sizes so your safe!