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| Reviews Summary for Gamma Research HPS-1A |
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Reviews: 27
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Average rating: 5.0/5
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MSRP: $129.95
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Description: The HPS-1a is capable of supplying full power to any 12 volt, 100 watt class transceiver in normal Voice SSB or Morse CW modes. RTTY, AM, and FM modes should be limited to about 35 watts.
Input Voltage = 100-240 VAC, 50-60 Hz, 2 Amps maximum.
Output Voltage = 13.5 VDC
Output Current = 5 Amps Continuous., 22 Amps @ .25 duty/sec.
Dimensions: 3.37" x 1.55" x 5.25"
Weight: 1.25 lbs.
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More info: http://www.gammaresearch.net/hps-1a.html
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write your own review of the Gamma Research HPS-1A.
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WW0AL
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Rating: 5/5
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Sep 12, 2007 20:33
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Yep, It Works
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Time owned: 6 to 12 months
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I can't find any way in which this little power supply works any less well than my several big ones. I bought it to power an IC 703, and ended up letting it power a 756 Pro III.
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K7AGE
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Rating: 5/5
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Jul 18, 2007 11:21
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One year later
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Time owned: more than 12 months
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I thought I would add to the postings. The power supply has worked fine since last year.
The fan became very noisy. I removed the fan and pealed off the label on the fan and gave it a dab of WD40. This fixed the problem, but I wish the fan was quieter. If the power supply is sitting on the table in front of you, you will hear it.
I would buy another and I recommend it to anyone needing a small light weight power supply for portable use. Perfect for FT-817 too.
Randy
K7AGE
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N1GXC
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Rating: 5/5
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Jul 18, 2007 10:09
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Simply Amazing !!
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Time owned: 0 to 3 months
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At 1-1/4 pounds this is just a portable or DXpedition dream. It meets all their claims for power and quality. All I added was a powerpole connector. I'm using it with both the IC-706MKIIG/LDG Z-100 and IC-7000/LDG AT-7000. Full output on SSB & CW. No problemo.
Dan WZ1P
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RW3AH
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Rating: 5/5
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Jun 29, 2007 08:19
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very nice PS
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Time owned: 0 to 3 months
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I am happy owner of very small but very powerful PS "HPS-1A". I would like to say THANK YOU to Fred K3GQ for very nice product. Unfortunately USPS was delivered parcel for 1 month to Europe, but finally and fortunately I got it.
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N9QGU
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Rating: 5/5
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Jun 18, 2007 19:39
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I Year Later
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Time owned: more than 12 months
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I took this to St. Martin for an ocean side mini-dx trip. It was used to power an Icom 706MKIIG. I had it conected to the local 220 power grid. The 706 was putting out 100 watts SSB. I made 1011 contacts over 14 days. The power supply performed flawlessly.
What more is there to say?
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K6USN
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Rating: 5/5
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May 12, 2007 08:41
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Still going strong!
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Time owned: more than 12 months
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This is a follow up review a year down the road.
I've taken this little p/s all around the South Pacific, and used it on 110 and 220V grids to power my IC 7000 as well as my FT 817. It runs cool and quietly. I do use surge protectors when
in 'developing countries' as line voltage is often suspect. Performance: flawless!
If I could, I'd give this a "6" !
What more is there to say?
Allen
K6USN (ZK1USN)
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K3GK
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Rating: 5/5
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Feb 1, 2007 06:02
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Just received
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Time owned: 0 to 3 months
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This is a little jewel! I hope Gamma stays with the molex DC connector. Anderson power poles can easily be added, and Gamma Research provides a connector with the unit, which is rugged and similar to the connectors on my rigs. I followed the soldering instructions for the connector provided on the back of the instructions sheet.
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WD0JIM
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Rating: 5/5
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Oct 31, 2006 07:10
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Works Well for SSB @100 Watts
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Time owned: 0 to 3 months
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Amazing how small this power supply is. No problem running my Icom 706 MKIIG at full power on SSB. Wish the power supply had Anderson Power Pole connectors on it.
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W2MSK
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Rating: 5/5
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Aug 13, 2006 14:21
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Amazing
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Time owned: 0 to 3 months
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This power supply is a solution to a continuing problem, how to carry a high current p/s in a compact and light weight package. The size is amazing, no bigger than a small paperback, 1.25 pounds. I tried this with my 100 what SSB/CW HF rig and it supplied all the current necessary for a full 100w output on SSB. The "secret" is the large capacitance storage. This is confirmed by the very slow voltage discharge rate. It takes several minutes after turn-off for the voltage to bleed off and the LED to show an off condition. A simple concept that has not been implemented successfully to date. Highly recommended
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K7AGE
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Rating: 5/5
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Jun 20, 2006 11:26
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Great for traveling
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Time owned: 0 to 3 months
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I bought the HPS-1a to use during my holiday to the UK. I was in the UK for a month, first week in hotels, and the last three weeks on a canal narrowboat.
I wanted to take my FT-857 to use on the boat, but the big question was how to deal with the 12 VDC from the battery to the radio. This would involve some heavy wire and battery clamps. Routing the DC cable would be a challenge since the batteries are under the back deck with covers and a door to pass the cable through.
Then I saw the CQ article about the power supply. The boat has 220 VAC from an inverter. I figured that the power supply would weigh less than the DC cables and take less space for packing. And, I could operate from the hotels! Thanks for the 100-240 VAC operation. The power supply is about one quarter the size of the Alinco DM-330 power supply that I also have.
The power supply arrived a couple weeks before my holiday. I made up short power cable to the FT-857 that was just long enough to allow the power supply to sit on top of the radio. I also added a switch to the power cable that forces the FT-857 into low power. This saves going to the radio menus to reduce power. I made a second power cable with a Power Pole connector to run my HT. I ran the system for several days from home, and everything worked great. No noise in the radio and the fan is very quiet.
Operation from the hotel was great. I used the power supply to run the FT-857 on 2M FM to connect to a local Echolink node. On the boat I used the FT-857 for 2 meters and PSK31 on 20 meters without any problems. For PSK, I dropped the transmit power to about 40 watts. For 20 meters I clamped a Super Antenna MP1 vertical antenna to the roof of the boat. Narrowboats are all steel, a good ground plane! I did not hear any noise from the power supply nor the boat�s inverter.
If you open the power supply up you will see a small OEM switching power supply connected to a pc board with 5 25 farad 2.7 V caps in series. The soldering of the cap board was a bit sloppy and the flux was not removed. Everything else is well made.
Take this power supply to your local club meeting and tell everyone that it has 5 FARADS of capacitance and watch their faces!
Oh, the fan runs for 4 minutes after you turn off the HPS-1a! Otherwise the front LED would probably never go out!
Randy, K7AGE
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