| K2IZ |
Rating:  |
2023-09-14 | |
| DM-330MV |
Time Owned: more than 12 months. |
| I bought a DM-330MV several years ago, I turn it on when I use it and off when the station is idle. I have used it to run several different makes of radios, HF, VHF/UHF, I hook the output to two screw strips and feed everything off that, I rarely key more than one radio at a time but the few times I have it works fine, no amplifiers just 100 watts, or 50, and a wire. Well I started having problems with my VHF/UHF radio the other evening, kept shutting off every time I keyed it, took everything apart and checked all the connections, one night later I tried one of the HF rigs and had the same problem, after many years of good service the supply finally went south, I did switch it out with a spare supply and everything worked, so after many years of good service I just got off the phone from ordering a DM-330MVT, why change to something different after the good service I got from the old one. |
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| WA2NLL |
Rating: |
2023-07-03 | |
| Great Power Supply |
Time Owned: more than 12 months. |
| I've been using the DM-330MV for 18 years. It powers both my 2/440 and HF stations. Solid as a rock, no issues. |
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| W2SAS |
Rating: |
2023-02-21 | |
| Great P/S ! |
Time Owned: 0 to 3 months. |
| I called HRO looking for a recommendation for a good supply that wasn't as noisy as my Astron RS35A for my FTDX101d and the guy said I have three of these at home, its a great little supply, so I gave it a try and I am very happy with its performance. Thinking of getting a couple more for my other radios. |
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| KP4AA |
Rating: |
2022-09-09 | |
| Quit at 6 months |
Time Owned: 3 to 6 months. |
| My new power supply dropped to 2 volts output after 6 months of ownership. I’ve never had a power supply fail in 45 years. Fortunately I keep the old power supplies for back ups and put an old MFJ switching supply back on duty. Still waiting for an RMA so I can send it to get repaired. Ugh. |
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| W9RNA |
Rating: |
2022-05-01 | |
| Very noisy power supply |
Time Owned: 0 to 3 months. |
I had some issues with my 36 year old Astron RS 35A power supply. And looked at the reviews on eham about this power supply.
Well I ordered it from DX Engineering, and it arrived in 2 days. The power supply is very well made and took very little space on the desk. But when I powered it up. I noticed alot of birdies on the 75 meter band. That was not noticed at all with astron.
When I used the filter control. The birdie move away from the frequency. But only to come back after a couple of minutes. And this happened on all bands.
Well after about an hour of this noise dance. I hooked a old KPS 12 power supply. And the birdies were gone.
Well I returned it back to DX Engineering. And ordered the parts to fix the RS 35A from Astron. And that is back in service again. For another 30 years.
I would not waste the time on this Alinco power supply. It is not worth the time. |
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| K7JQ |
Rating: |
2022-02-23 | |
| Update: Still runs without a hitch |
Time Owned: more than 12 months. |
I just replaced my 16 year old Astron RS-35M with this switching supply, and so far am quite impressed. I've only had it for a week, so I can't vouch for its' reliability or longevity, but now know why it has as many reviews on this website as the very popular RS-35M.
Besides it (obviously) being small and lightweight, as compared to the big linear supplies, it is a solidly built unit, with a real quality feel to it. It has a thick metal wrap-around cabinet with a massive heat sink on top. It comes with a sticker on top advising not to touch it due to extremely high temperatures. I used it all last weekend in the CQ WPX SSB contest, and it only got a little luke-warm to the touch. It has convenient front terminals for attaching various accessories, but the rear high-current terminals provide plenty of room for connecting several permanent accessories and your radio, without having wires hanging off the front ones. They can be used to conveniently connect temporary equipment. The front panel has a concentric knob, with the voltage adjust in the back, and noise offset in front. A previous reviewer said that it's possible to accidently hit the voltage adjust knob, but that would be really hard to do, considering its' location. Besides, most of us (and myself) probably just use the default switch at a fixed 13.8V, disabling the control altogether. I listened up and down the bands, 10-80M, for RF hash or birdies, and found nothing...never had to use the noise offset control during the contest or after. I measured the output voltage...it's dead-on at 13.8V, and the front meter shows this. The meter also shows accurate current draw. The rear fan, for all practical purposes, is inaudible...you have to put your ear right up to it in order to hear it. The only nit-pick I have is that the meter lighting could be a bit brighter.
So far, I'm very happy with my decision to replace the linear supply, and recommend this unit if you're looking for a quality, feature packed high-current switcher.
_____________________________________________
Update: 2/25/22....
Now have used it for 9 years under very demanding contest operations. Still very quiet, no RF hash, and hasn't missed a beat. Only quirk...the meter light burned out.
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| W4MSL |
Rating: |
2022-02-23 | |
| Dual Voltage Input! |
Time Owned: more than 12 months. |
I didn't purchase this expecting to use it anywhere but in the US. However, I'm now posted overseas, where voltage is 240V. While browsing the HRO catalog today, I was surprised to see this unit described as being capable of dual-voltage input via an internal switch. I got out my screwdriver and, sure enough, there's a clearly labeled rocker switch on the PCB. Even better, there's an access port (hole) in the bottom plate directly over the switch. As long as you remember the directionality of the switch, you can toggle between 220V and 120V w/o removing the bottom plate. A nice touch, although there is no hint of this feature in the manual which came with my DM-330MVT (purchased 2001). A label identifying the access port and switch settings on the bottom plate would also have been thoughtful, but I'll add my own using a label printer. This has been a good PS and generally quiet on HF for me.
22 FEB 2022 - After years of being unused while I was not operating, I placed it in back in service a few years ago. It continues to perform w/o a hitch. When I power my rig OFF, the fan on the DM-330MVT comes on for a few seconds, then turns off. I haven't noticed it running while OTA, but perhaps only because it is rather quiet. I have a huge Diamond 240V linear P/S that I considered using on a dedicated 240V circuit, but why bother? This one has been as silent as the grave for me. |
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| K6LCS |
Rating: |
2022-01-25 | |
| Excellent performance |
Time Owned: more than 12 months. |
| I have two of these, purchased about 15 years ago. One is one most of the time, the other travels with me. Flawless performance from both. |
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| N1RND |
Rating: |
2021-08-31 | |
| The perfect power supply. |
Time Owned: 6 to 12 months. |
Was back ordered due too Covid but was worth the wait.
It is perfect in every way.
Size, amp rating, connectivity. I never have had to use the noise adjustment. The lighted meter not only tells you voltage and shows you how much current your rig draws at idle and different power levels, but looks cool too!
The fit and finish is high quality, the front panel is metal, not plastic.
With the variable voltage you can determine the lowest voltage your rig will take before tripping out.
Only caveat is some owners say the fuse is hard to fined, I'll have to check that out and try to get a few before I need one. |
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| N1AOA |
Rating: |
2021-04-07 | |
| Good PS with a small footprint |
Time Owned: 3 to 6 months. |
| I like this PS. Yes it’s switching, but that’s why it’s small and light. Can barely be sure the fan is on when it’s on. Very quiet. I set it to 13.8v (Preset =On) and it stays there. Then I set the front analog meter to Amps and I can see when my radio is transmitting in digital modes.v |
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