TekPower TP30SWII 30 Amp DC 13.8V Analog Switching Power Supply with Noise Offset

The old power supply I had for my ham radios bit the dust and was beyond repair so I did some research before I replaced it with this one. I was hesitant to buy it because I was wondering what I'd get for only $100 and I still have unfounded prejudice about things made in China. For decades, "Made in China" meant cheap in quality as well as price. Old attitudes die hard. The truth is, I'm finding that electronics made in China are even better than those made in Japan. This power supply is further evidence. What I like about it: 1. It has the look and feel of something well made. There is no cheap plastic feel to it. The knobs aren't loose. Everything is solid. 2. The analog meter, unlike the photograph, has distinct lines and it's easy to read. 3. It is virtually silent. So far, the fan hasn't had a need to come on. 4. The volt and amp meter functions come in very handy. A power supply with a meter is a must-have. 5. There are three ports for power. Snap in output, cigar lighter, and terminal. The convenience of having multiple ports is very nice. 6. I haven't used the variable power feature or the noise off-set, but it's nice to know they're there. 7. It is a fraction of the size of my previous power supply. 8. The price. I can't say this will last a long time because I just got it. And I can't say how it performs when driven to the limit because I've just run it at 8 amps. But so far, I am very pleased. ---------------------------------------------------- Update: I've had it a few weeks now and I'm still pleased with it. Though it says 30 amp, it's really only 25 amp, but that's enough for a 100 watt transmitter. Be aware that the three connector ports are rated differently. Only the back terminal will give you 25 amps. The variable voltage knob works and I can crank it up higher if/when I want. I haven't had to use the noise eliminator because it hasn't been creating any noise. The unit continues to be absolutely silent. One minor disappointment is that the volt meter doesn't show you what voltage you're actually putting out. It's just a gauge what shows what you're setting it for. If you want to see to what extent the voltage will dip with a heavy draw, you'll have to attach an external volt meter. All in all, I'd say that for ham radio, this is the one and only power supply to get. -------------------------- Further update: It's been 7 months now and I still regard this as a very fortunate purchase. There are a lot of power supplies on the market. Prices vary and I hear some of them are junk so I was nervous when I decided to buy this one which is cheaper than most. I think that's why I'm so pleased. Instead of being junk, it's in fact exceptionally good. The fan has gone on only once now so I know it works. The good news is that when it did go on, it was whisper quiet. I had thought the noise offset feature was a useless extra but there have been a couple of times now when it's come in handy. When I'm not using the snap-in port, I now have a small digital volt meter connected. I don't have much need for it but it kind of looks nice. It's one of those volt meters you can get on Amazon for $2.50. I usually leave the unit set to 13.7 volts and forget about it but there have been a couple of occasions when the variable volt feature has come in handy when I wanted to test the performance of a couple of QRP rigs. Primarily, you want a power supply to be there, do the job, remain quiet, and not fail. This power supply does all of that. But I'm also pleased to discover that the added features that I would have gladly done without are actually coming in handy now and then.

Its a great power supply it works great. In the picture I have installed a volt meter that is made to plug into a cigarette lighter socket it was cheap to buy on Amazon and is a nice addition to the power supply it gives it a digital voltage readout. The voltage on the digital readout is usually 13.8 and just fluctuates very slightly to a 13.7 I would say that is very stable. I do not get any voltage drop when I am transmitting and so far its staying very cool and it has not had the need for the fan to go on. The adjustable voltage is awesome when I crank it up I see the watt meter reading higher on the radio. I am not hearing any sound from the power supply or any sounds from the supply coming threw the radio. Everything is great!! The price was very good for a supply with all these features like the many connections. I like that it has a cigarette lighter socket works well for connecting a radio you may have that plug on also for the digital volt meter that I have installed. Great addition for only a few dollars. The switch to see volts or amps in the analog gauge is great to see your power draw on amps and seems to work well for a voltage readout also. I would highly recommend this power supply for anyone that wants a nice power supply and the price is great.

I purchased this power supply to use for my IC7300 and wanted to wait a while before reviewing to ensure that it lasts. Over a year later, it's working great and I haven't had any issues aside from one which was my fault. For the price, this power supply is well worth it in my opinion. Probably the best part of this is the ability to offset noise; as a switching power supply, it is bound to be at least somewhat noisy, but this power supply features a knob that lets you offset that noise away from the frequency you are using. Of course, it doesn't get rid of the noise, but if you are testing on a specific frequency, or using data modes like FT8, the ability to offset the noise away from the frequency you're in is a great feature to have. *!Note: if you want to be able to use this and use the variable voltage knob, you have to use the switch on the back to put it into "manual" mode -- otherwise, it will deliver 13.8v by default and the knobs won't change anything. It has a marker at the 13.8v point, which is very helpful also. It powers my IC7300 at 100 watts with no problem. I did accidentally short the supply when using it to power a kit radio which didn't have any proper connectors (my fault), and the output went to 0V (which was probably some sort of short/overvoltage protection, which, if that is the case, is great), but after power cycling it, it has been working fine ever since. I would definitely recommend this for someone who is building up their shack or just needs a power supply that will deliver a constant voltage between 9v-15v, with the ability to deliver up to 30A and offset noise, without breaking the bank. It does its job great at a good price. If you need a variable power supply to power a number of different things with different voltage requirements outside of the 9v-15v range and don't need more than 5-10A, this is not designed for that, and there are much better options with much wider ranges for the same price or less.

I use this power supply for both a GMRS and CB radio base station in my home. I have had no issues with power fluctuations or noise from the unit while it operates. It was very simple to use and fits nicely on a bookshelf. It does have some weight to it, but I would rather deal with a bit of heft, then something that is flimsy and may become damages easily. This item is a recommend for the novice or veteran radio operator looking for a powerful supply without breaking the bank.

When I took it out of the box I heard something loose inside of the unit and one of the four fan screws was in the plastic bag with the unit. I assumed it must be a nut or something that was attached to the fan screw rattling around inside, so I proceeded to remove the six Philips head screws that held the bottom plate on. Five of the six screws were loose and stripped. After finding my assumption correct, I reattached the nut and screw to the fan and replaced the six screws with slightly larger diameter screws that I had in my loose screw drawer. Aside from the cheap screws on the bottom plate, this unit appears to be pretty solid! I like the color in the meter lights and the amp/voltage selector switch so that the readout can be toggled. I also appreciate the pc style removable power cord! I am using this unit to power a Galaxy DX 88, a Kenwood TR7950, and an ICOM IC-725 all from the 30 amp posts. The two meter is plugged into the posts with banana plugs and the other two are secured to the posts with ring terminals. Although I have no need to transmit on all three units simultaneously, my test showed the TP30SWII had no problem taking amperage from all three! I give it four stars due to the cheap screws and the low quality control of the fasteners, but I still recommend the power supply. Update: After more than 5 years of service, this unit is still working as it was from day-1. Other than hurricanes and lightning storms I have never powered the unit off.

After several years of use, it still works great

I needed this for a test bench power supply for some 12 volt hardware my employer sent me to evaluate. Instead of going the cheap PC power supply route, I decided to spring for something with more stable power. I first purchased another brand on Amazon and it was dead on arrival. I waited for two months for a refund, but that’s another story...thanks Amazon. Back to this unit...I actually ended up liking its stable power so much I decided to use it for one of my Ham Radios. I figured I would have noise that I would have to use the built in knob to filter out, but zero noise. I ran a meter alongside some amp output checks and observed that the needles are spot on. The LED backlit needles are also a nice feature as they remind me once I turn the lights off in my shop if I forgot to turn off the power supply. I run power supplies for my other Ham Radios that cost 2 to 3 times as much, but I would not hesitate to purchase another one of these units and dedicate it to one of my radios. Good find, good quality so far and good price.

This supply has been fine for powering a 100 watt Amatuer Transceiver. I opted for the analog meter but it can also be ordered with a digital display. There is a rear mounted switch that allows for a set 13.8 vdc or allows the voltage to be adjusted via a front panel control. The noise offset is handy should the receiver pick up the switcher noise, then a slight adjustment will shift the noise off frequency. I am pleased with the power supply and it has been running a few weeks without issue