Samlex SEC-1235M 30A Switching Power Supply w/ Analogue Meters

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.

As advertised

I bought this power supply to power my Yaesu ft710 in my ham radio station. I've put countless hours in with it, and it hasn't as so much hiccupped. For a switching power supply, you really can't go wrong with this one. Even running digital modes like FT-8, it simply does not care.

I had previously been running a cheap power supply with my GMRS base station. Tightened up my installation and added this power supply. Good clean power for ham or GMRS radios. Will pick another one of these up soon.

This is a really good power supply.

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 consistently run this at a 15-20 amp load. Fantastic power supply. I will strongly advise to run thisdevice in a moderate temperature evironment as the instructions state. I found that if used at 80 degreesor 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 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.

Compré la fuente para ser usada en 220V, las instrucciones y facilidad de conversión de configuración de 110V a 220V las encontré maravillosas. Arroja los 13.8V en forma precisa y con un nivel de ruido bastante bueno, solo tiene ciertos picks de ruido al encender el ventilador cuando alcanza mucha temperatura. No me ha hecho pensar en el hack para dejar el ventilador continuo.

I have three of these power supplies. I use them to power my ham radios. these power supplies are quiet, easy to use and do not introduce a lot of RF noise into my radios. the voltage is stable, all the way to 25-30 amps. If you need a 12 volt fixed voltage power supply, i recommend these.

Have not pushed it or scanned for harmonics but it seems to be a decent supply for the $$’s, power posts stink, so a mod is in order, non lighted meters, such simple things to give it 5 stars.

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.

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.

I use this to power a Kenwood TS590SG, and it has performed well. No problems with the transceiver running at 100 watts. The fan is a tad loud, but it doesn't come on very often. I'm usually wearing a set of headphones when operating, so the noise isn't much of an annoyance. I've not encountered any RFI/QRN from the switching circuit.

I've had this unit since sept. 18, 2017 and have used it to power several radios, including Icom 7300 and 7100. No problems what so ever and I have from time to time left it on over night when I've forgotten to turn it off after a long night of working HF. I've actually powered three radios at the same time using it and it didn't even burp. I'm actually fixing to order another one from this company with an even higher current rating so I can power more radios at the same time.K4EIA

Is doing well with my 2m mobile rig. No decernable noise and hold the voltage (according to the Samlex internal meter) rock steady. I’ll update my review once I get my IC756pro3 up and running which is what it was purchased to feed.

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.

UPDATE - Amazon shipped me a new PSU after I returned the first one. It has been in steady service, since April. It works as it should, though the choice of DC supply connectors, and a little RF hash it seems to generate keeps it from being a four star product.FIRST REVIEW - I bought this based on reviews here and on eham.net to serve as the main power source for two amateur band radios and associated equipment. Unfortunately, it arrived with a dead voltmeter and a mis-adjusted ammeter. Not the sort of thing that inspires confidence. Voltage levels and current output appear to be fine so I returned it and ordered another. Hoping I will have reason to upgrade my review in a week or so.Out of the box though, I note three questionable design choices: no external chassis ground point, fan design, and the DC terminal choice. Textbook grounding practice ties all the chassis together (star fashion) to a common ground point. Can't do that without modifying the radio. The fan only turns on when the power supply is really hot and it is really loud. There is a mod that will keep the fan running at a low level all the time. And while I don't expect the world to convert to power poles, the choice of a screw terminal (which doesn't work well with stranded wire) means adding pins to the power cable. Why not put standard 5 way posts on the unit?

4 year update! We have been running this supply in moderate duty cycles for just over 4 years straight now. The only time it has been off is during mains power failures. That's over 35,000 hours of continuous use! It continues to perform as expected. We've experienced zero issues with this supply.---Original comment:Using this to run a 75W radio, and it hardly lifts a finger. The fan turns on after several minutes at full power operation. No noise or intermod. Very durable unit. Nicely put together.

There are a lot of power supplies out there to pick from in all different price ranges. After reading a lot of reviews on this site and a few others I purchased the Samlex SEC-1235M. So far it seems to be very stable and delivers the current that I need on demand. It's very quiet and runs cool. So far I have not heard the fan at any noticeable audio levels at the power levels that I have been transmitting at. Seems like a very good buy for the money.