Samlex SEC-1235M Desktop 30A Switching Power Supply, Advanced switch-mode technology, Reliable power with minimum weight and size, Circuit innovations minimize output voltage ripple and RFI

Works very nicely with my IC-746PRO. No discernible hash noise whatsoever. Easily delivers the full current for my radio. I don’t notice an overly loud fan on the power supply. Seems reasonable to me. I would buy another one of these. Decent little power supply.

This is not my first Samlex power supply. I have chosen Samlex for a couple of reasons. They are reasonably compact. They are reasonably priced. They are designed for ham radio operators. Many switching power supplies emit switching noise into ham bands, but Samlex supplies are designed to keep the switching noise present in all switching power supplies out of the ham bands. Also, of the eight or ten Samlex supplies I have owned personally or used in various places over the past 20 years I have never known one to fail, including the ones that have been on powering my radios 24/7/365. When anyone askes me what power supply to buy I always recommend Samlex, and preferably the SEC-1235M because of the output level and the dual meters.

Excellent affordable tuner. Works great with my OCF SH antenna.

Had to replace a 35 yo Astron Linear PS that was making to much buzzing noise from the transformer and taking too much space. This unit is small, very silent, and I did not find any switching RFI in my radio. (TS590SG) When the fan kicks in, it's a bitter louder than what I'd like, but it really does not happen very often. For the price, you cant ask much more.

I've had this since my Icom PS125 gave up on me. Since I was already using a switching supply this was an easy choice and recommended highly by a friend. Over 2 years in service and not a blip. The fan never kicked in at my old location, but recently it has on occasion, and sensitive radio mics may pick up the fan noise. Due to the slim case they obviously can't use a bigger one that would be quieter. As for switching noise, none has been noted, and I've used it with rigs from HF through UHF. One minor thing is the strange posts used for the DC output, but I believe someone makes a pigtail that adapts them to the popular Anderson PowerPole connectors. Minor gripe and I'd almost forgotten about it. If I remember right Samlex did include connectors for bare wire at least.

I have always been told that switching power supplies have a lot of noise in some receivers. I now have 3 of these power supplies on my HF radio, my VHF/UHF radio and a separate UHF radio. The HF radio is used exclusively on FT8 and has no problem except for atmospheric noise that I have no control on. The other 2 power supplies are used on FM radios who have some noise discrimination already. There are working very well for me.

I've had this a couple of years now and it is working fine. When I first received my unit the voltage meter was reading quite low. After an email or two with Customer Service they agreed at my request, to send a new meter rather than sending the unit back. I replaced the meter myself. Has been working fine since then. One thing I didn't care for was the operation of the fan. It's off until under heavy use. If internal temp reaches about 140 degrees F, then it kicks on with a vengeance. If it's close to your operating position, you'll probably find it annoying as did I. Fortunately, there is a mod for this that keeps the fan running at a continuous low speed. It still has the ability to kick into high, if needed. However, I have found that the constant low speed does well at cooling and high speed will not likely need to kick in. Google it, make changes only if you're capable. Everything considered, operation, price, available mods, Customer Service....I can recommend this product and would purchase again.

I consistently run this at a 15-20 amp load. Fantastic power supply. I will strongly advise to run this device in a moderate temperature evironment as the instructions state. I found that if used at 80 degrees or above, the fan continues to run with no load and until the room cools down. Nothing wrong with device. You won't be disappointed.

I was somewhat apprehensive about ordering this power supply as I had heard stories about switching power supplies being noisy and generating hash but a good friend whose judgement I trust recommended this supply. I am just delighted I listened to him. It is very light and absolutely silent ! I am a ham and it powers my Elecraft K3 with no issues. I really do recommend this power supply, you will not be disappointed !

Very nice power supply, easy to hook up and works well. No noise coming from it, light weight and compact.

Just got the power supply today. It is super quiet and the output voltage was bang on at 13.8 VDC. No adjustments required although one could adjust the output voltage using VR2 located inside the power supply. Like the 3 year warranty. Haven't run it under heavy loads yet but expect that it will handle the 25 amps that's needed. The build quality is impressive and the fit and finish is good. Awesome power supply at a reasonable price. Definitely would buy this brand again...

Works great, no interference. Very light weight perfect for travelling

This is a great power supply. High amperage and silent to operate. There is a thermally controlled fan, so it does not come on until the unit reaches a certain temperature. As well there is no detectable ripple or switching noise, and no coil whine that is audible either. The terminals on the back are somewhat flimsy, the grub screws don't have many threads to bite into.