10 year warranty for $10 on most new radios! Use code: PROTECT | Order $300+ and make 12 easy payments with PayPal Credit!


50% of 100


Free Shipping!

We are not accepting backorders at this time due to unpredictable lead-times. Please check back later.

Check Store Stock


Las Vegas:

Distribution Center:

45A Switching Power Supply with Meters

MFJ's new MFJ-4245MV Adjustable Voltage Switching Power Supply does it all! Power your HF or 2M/440 MHz radio and accessories. MFJ's MightyLites are so light and small you can carry them in the palm of your hand! Take them with you anywhere. No more picking up and hauling around heavy, bulky supplies that can give you a painful backache, pulled muscle or hernia. MFJ's 25 Amp MightyLite weighs just 3.7 lbs. -- that's 5 times lighter than an equivalent conventional power supply. MFJ's 45 Amp is even more dramatic -- 8 times lighter and weighs just 5.5 lbs.

No RF hash!

These babies are clean... your buddies won't hear any RF hash on your signal! None in your receiver either! Some competing switching power supplies generate objectionable RF hash in your transmitted and received signal. These super clean MFJ MightyLites Switching Power Supplies meet all FCC Class B regulations.

Low Ripple...Highly Regulated

Less than 35 mV peak-to-peak ripple under 25 or 45 amp full load. Load regulation is better than 1.5% under full load.

Fully Protected

You won't burn up our power supplies! They are fully protected with Over Voltage and Over Current protection circuits.

Worldwide Versatility

MFJ MightyLites can be used anywhere in the world! They have switchable AC input voltage and work from 85 to 135 VAC or 170 to 260 VAC. Replaceable fuse.

MightyLites...Mighty Features

MFJ MightyLites feature a front panel voltage control. It lets you vary the output voltage from 9 to 15 volts DC and gives you a highly regulated voltage output -- this includes 12 Volt DC and 13.8 Volt DC!. You get an easy access front-panel with five way binding posts for heavy duty use and a cigarette lighter socket for mobile accessories. The MFJ-4245MV Switching Power Supply has two sets of quick connects on the rear for accessories. Large 3 inch dual meters are brightly illuminated to make it easy to monitor load voltage and current. A whisper quiet internal fan efficiently cools your power supply for long life.

Specifications and Features

  • 45 Amps Surge, 40 Amps Continuous at 13.8 Vdc
  • Front Panel Adjustable Voltage (9-16 Vdc)
  • Lightweight, only 5.5 lbs.
  • Compact, only 7½" W x 4 ¾" H x 9" D
  • Easy Access Output:
    • Five-Way binding post for HF/VHF radio
    • Cigarette Lighter Socket for mobile accessories
    • 2 Pair of Quick Connectors on back
  • Over Voltage Protection
  • Over Current Protection
  • Automatic Shutdown on Fault Load
  • Lighted Dual Meters: Volt-meter and Amp-meter monitor load continuously
  • Quiet internal Cooling Fan with "Fan On" LED
  • Input Voltage: Switching AC Input Voltage
    • 110 VAC at 47-62 Hz
    • 220 VAC at 47-63 Hz
  • Regulation: Works with AC input from 85-135 Vac or from 170-260 Vac
  • AC Line Fused (10 Amps)
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account