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MFJ 4230MV 30 Amp Switching Power Supply

  • MFJ-4230MV
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Product Description


This is the world’s most compact switching power supply that also has a meter and adjustable voltage control.

Just 5" W x 2 ½" H x 6" D, it weighs only 3 lbs. -- it is the perfect pack-n-go power supply for field day, DXpeditions, camping, hiking or to pack for your next business trip or vacation to some far away place.

MFJ-4230MV gives you 25 Amps continuously or 30 Amps surge at 13.8 VDC. The voltage is front-panel adjustable from 4 to 16 Volts. MFJ-4230MV also has a selectable input voltage: choose from 120 or 240 VAC at 47 - 63 Hz.

A simple front-panel push-button switch lets you choose either Ampmeter or Voltmeter -- allows you to select Amps or Volts as you wish to read them.

MFJ-4230MV has an excellent 75% efficiency and extra low ripple and noise, < 100 mV. Awhisper-quiet fan cools by convection and forced air cooling.

Normal air-flow around the power supply is continuous and a heat sensor increases the fan speed when the temperature rises above 70 degrees celsius.

DC output is five way binding posts on the back of the MFJ-4230MV so you can power your dedicated HF, VHF or UHF transceiver with ease.

All MFJ switching power supplies are protected by MFJ’s famous NOMatterWhat™ one year limited warranty.

MFJ will repair or replace (at our option) your switching power supply no matter what for one complete year

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Product Reviews

Showing reviews 1-10 of 21 | Next

  1. Great Power Supply 5 Star Review

    Posted by on 24th Jul 2019

    Since this is my 2nd same power supply, this is the second report on the same product...It does the job and easy to go from box to getting on the air.

  2. everything you need 5 Star Review

    Posted by on 3rd Jun 2019

    small, efficient, inexpensive and electrically quiet

    the meter is a nice touch

    no complaints

  3. Plenty of stable power 5 Star Review

    Posted by on 4th Oct 2018

    Plenty of juice for the Icom 7100. Quiet fan.

  4. VERY Quiet 5 Star Review

    Posted by on 19th Apr 2018

    I bought this power supply originally to store for when I get my HF rig put together. I decided to give it a try just to see what kind of noise it puts out during normal (to me) use of my dual band radio. I ran a local net here this past Tuesday (4/17/17) and this power supply never made a sound. My previous power supply would have made it much more difficult to hear incoming transmissions to the net. I think instead of saving this one for my HF rig, I'll just get a new one for it. Also, as always the good folks at MTC made my purchase seem effortless on my part and the power supply was at my door a day prior to when it said it would be! Thanks Richard and Christine for another great buying experience!

  5. A sweetheat PS 5 Star Review

    Posted by on 8th Mar 2018

    Solid. Quiet. Small. Accurate voltage. If there's any faults with it ... I sure could tell ya.

  6. Compact 5 Star Review

    Posted by on 20th Feb 2018

    Just what I needed for a portable rig. Compact and light yet built like a tank. Has more than enough power.

  7. Nice Supply runs cool 4 Star Review

    Posted by on 20th Nov 2017

    Have a MFJ 4230MV 30 Amp Switching Power Supply running an ICOM 718 at full power - 100Watts

    Little rag chew mostly listen, work great. Voltage control know has nice pre-set notch at 13.8V.

    Will buy another when time is right.

  8. Love it ... except 4 Star Review

    Posted by on 23rd Aug 2017

    Love the power supply and MTC shipped it well packed, and all works as advertised. My only 'except' is that I'd like the power terminals on the back to either have a hole through the post for the power wire, or Anderson Power Poles. The lack of a hold in the power posts means you have to wrap your power wire around the post and then tighten the nut ... This is always a risk for the power wire coming off the post and/or accidentally shorting to the nearby other post. Otherwise, the power supply is light, small, and silent ... a great match for my ICOM IC-7100, and I do recommend it to others.

  9. Great Product 5 Star Review

    Posted by on 8th Dec 2016

    The QJE power supply is great.. large enough for all my power needs

  10. mfj 4230 mg power supply 5 Star Review

    Posted by on 14th Nov 2016

    Very nice power supply works just like it should.I recommend this product to all.

Showing reviews 1-10 of 21 | Next

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