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Reviews For: Astron RS-50M

Category: Power Supplies

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Review Summary For : Astron RS-50M
Reviews: 28MSRP: 240.00
Power Supply. 13.8v nominal with volt/amp meters.
Product is in production
More Info: http://
# last 180 days Avg. Rating last 180 days Total reviews Avg. overall rating
KJ4EOZ Rating: 2015-05-25
great for years Time Owned: more than 12 months.
I don't know why KN3E had a problem like he did . Been running my RS 50M for over 6 years with no problem . I have beat on it hard from time to time . I always buy over what I need . over kill everything last forever !! Just like my amp AL-811H I just run it at 500 watts .

Earlier 5-star review posted by KJ4EOZ on 2009-02-08

Just got a new RS-50m I have my 706 MKIIG and my Autotuner and my FT-8800R and my FT-7800R all hooked to it . And I never use 1/2 its power .
Best of all its made in the good old USA .
Astron is the best of the best .

73s KJ4EOZ
N3HEE Rating: 2014-12-30
Good Supply - Repair Note Time Owned: more than 12 months.
I have no real problem with this supply. Solid, quiet and reliable. Recently however it started getting hot under load and I started to smell something burning. I removed the top of the case and started checking the pass transistors. They were OK. I started checking connections and found a loose ground connection on the main filter capacitor. I tightened it up and the supply is running great again. This supply is also easy to work on.
N4NOO Rating: 2014-08-20
Very hard to beat! Time Owned: more than 12 months.
I have had one for over 30 years. The only time it is off is when the power fails. Never turned off, never had a problem. Runs the whole shack and various outlets for experiments. You can not go wrong with this supply.
AD4BF Rating: 2013-09-26
Solid Power Supply Time Owned: 6 to 12 months.
This is a solid power supply. No hash, no noise, just reliable. The 5 min on / 5 min off duty cycle isn't really a true 50% cycle but it hasn't presented any problems. This supply runs the whole shack, A 480HX, D710A, and a couple of random 2M and 1.25M sets. I would give it a 5 but the front voltage meter overstates the voltage. It shows 14.5vdc on the supply while my meter puts it at 13.9vdc
AA2HA Rating: 2013-06-01
Reliable Power Supply Time Owned: more than 12 months.
As I read through the reviews, it is apparent that some folks haven't read the actual specs for this, and other Astron supplies. The RS-50 is marketed as "37 Amps continuous, 50 Amps intermittent". However, it clearly states, in the paperwork, and on the rear sticker that these numbers are for "50% duty cycle". I know what you're thinking... how is continuous not continuous? Well, it is continuous at 50% duty cycle. I know what you are thinking now... But, 50% isn't continuous. No, it isn't, but an A-99 antenna isn't 9 dB gain either. (Obviously some creative marketing tools at work.) I suppose the A-99 has 9 dB gain compared to something (like a coat hanger).
When pressed for specifics, I was advised, by Astron, that 50% duty cycle is "5 minutes on, and 5 minutes off." When I inquired what the real-life, continuous current would be (such as in repeater operation) I was advised "probably more like 25 Amps."
Knowing this going in, I have my RS-50M running my repeater at just over 20 amps and it's served me well. I own two RS-35M supplies to run my 100 watt HF radios and VHF, UHF radios; they've been in service for well over 10 years without any issues.
I give a 5 rating for reliability, great tech support, and a well designed supply. But an overall 4 for marketing strategy that would have the casual user mislead. I'd like to see Astron list the real-life continuous current of their supplies so buyers could make a more informed choice for their particular application.
N7UQA Rating: 2013-03-17
Built to last Time Owned: more than 12 months.
I have been a big fan of Astron power supplies since 1990. I bought mine from the Portland Ham Radio Outlet along with a Kenwood TS-440SAT and MC-60A on 7/27/90. While I no longer have the radio or mic, I still have the power supply and it's been in continuous operation ever since. The neon pilot lamp in the power switch is the only thing that has stopped working.

If you are looking for a good power supply that will last for decades, you can't go wrong with Astron.
KR4BD Rating: 2013-02-07
Outstanding Value Time Owned: more than 12 months.
I've had my Astron 50-Amp, dual metered supply for nearly 20 years now. I've never had a problem with it or the two (older) 20-Amp Astron supplies I also own. This 50-Amp unit suppies power to my entire station (3 HF rigs [used one at a time, of course], VHF/UHF rigs and their amplifiers). It runs cool and quiet and there's no RF hash---anywhere. It's a very solid performer.
W3DBB Rating: 2013-02-07
impressive Time Owned: more than 12 months.
Purchased RS-50M new in March 2001. Used daily since. This particular example does not have illuminated meters. Powers a Yaesu FT-920 100 Watt SSB XCVR & an Alinco DR-605TQ VHF-UHF mobile rig simultaneously. The RS-50M is substantially oversized for my application.

The power transformer is quiet. Never a problem with voltage regulation in 12 years and counting. Absolutely no RFI generated by this power supply.

The RS-50M survived my stupidity. The power supply wasn't much more than a year old when I touched a grounded 1" braid to the outside of one of the transistors mounted on the side heat sinks, creating a 12V high current mini-arc welder and destroying that transistor and one of the stud rectifiers in the process.

Some quick replacements from Mouser and the RS-50M was back in business. Has run flawlessly since, probably for a good 10-11 years.

Have never seen linear regulated power supplies for amateur use better than Astron's. I have no connection with Astron or anyone selling them.

Earlier 5-star review posted by W3DBB on 2009-12-05

And that's exactly what inadvertently happened. I accidentally touched a ground-rod connected piece of 3/4" braid to the outside case of one of the power transistors on my RS-50M, creating a miniature arc-welder in the process and blowing out one of the stud rectifiers. The affected transistor was electrically unharmed but since I partially melted it's TO-5 case I replaced it for cosmetic and reliability reasons. A new stud rectifier and it was back to life and has performed flawlessly for years now. I also purchased a RS-35M I've been kinder to but that one has the dreaded lamination noise emanating from the power transformer. The RS-50M's power transformer is dead quiet and I would buy another one if needed based on my experience. Because of the noise I have with my RS-35M I would not buy another of that particular model.
N4VNV Rating: 2013-02-07
SUPER PRODUCT Time Owned: more than 12 months.
My Astron RS-50 has been on for over seven years. I very seldom cut it off. NEVER HAD A PROBLEM WITH IT. I have a Kenwood TS-2000, a SGC-231 remote tuner (outdoors) and a West Mountain Radio Digital Noise Reduction Module hooked to it at all times.
W4KVW Rating: 2013-02-07
GREAT Product! }:>) Time Owned: more than 12 months.
I had one for many years & it never gave me any problems.Sold it to buy my current power supply which is the ASTRON RS-70M which handles everything I have thrown at it as well.BUILT TOUGH! {:>)