TekpowerTP30SWII 30 Amp DC 13.8V Analog Switching Power Supply with Noise Offset

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.

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.

2 months now and still working great, no noise on GMRS and no need to ever adust noise filter knob.

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 had issues and blamed the power supply. I was ,istaken. Please accept my apology.

Have been using this power supply for a couple of years now for my Icom 7300 and have zero problems. The whole top is a heatsink so the fan seldom has to come on. This one is a no brainer in my book.

Before I purchased this switching supply, I was using an Astron RS-35M "analog" supply. They are known for their reliability and clean DC output. I had been leery about using a switching supply on my ham repeater rack, worried about it generating interference on the HF bands. Turns out this thing is super-quiet (no interference on any HF bands), and it only draws 20w on receive, while the Astron draws 33w. So this one draws less current and runs cooler. I'll leave an update if anything changes.