13.8VDC, 25A, INPUT 9-13.8V

Today`s compact 100-watt HF rigs are designed to operate from about 12-16 volts, with output signal distortion, output power problems, and transceiver reset often occurring when voltage drops below 12 volts.

In the mobile environment, low voltage is caused in two ways:

First – even low resistance DC wiring can result in a noticeable voltage drop. For a 100-watt transceiver with a 20-amp typical current requirement, just 1/10th of an ohm resistance in your DC cable and connectors results in a 2-volt drop!

And second – when you turn your car off, battery voltage drops from around 13.8 volts to close to 12V after a short period of time. Couple this with any voltage drop in the cables, you suddenly have a problem.

MFJ’s Super Battery Booster eliminates low voltage problems by boosting input voltages as low as 9 volts up to desired 13.8 volts at up to 30 amps peak with a typical efficiency of close to 90%.

MFJ-4416C includes Anderson PowerPoleTM connectors and high-current 5-way binding posts for both the DC input and regulated output. An internal 30-amp input fuse protects the unit from excess output current demands.

There are also selectable limits on the minimum voltage that the unit will accept: 9-volts, 10-volts (default), and 11-volts. This protects you from over-discharging a battery and possibly damaging it. Also includes output over-voltage crow-bar protection should regulation be lost.

MFJ-4416C manual

Two additional features offer ways to increase efficiency even more!

The external boost enable Input allows remote enabling of the MFJ-4416C. You can either ground a line or connect the line to 4-13 Volts. You can also use an amp key line or ignition source to enable.

The second efficiency enhancement feature is a user-adjustable output voltage control which lets you set the output voltage anywhere between 12- and 13.8-volts.

When setting the output at 12-volts, input voltages greater than 12V will pass through, but the efficiency of the regulator is higher. And lower input voltage means your transceiver will run cooler!

Typically save over 30 watts in heat dissipation during transmit, and even 3-4 watts during receive. So it can actually be good to let the voltage sag to 12V, then let MFJ-4116B protect from lower voltages. Just 73/4Wx4Hx21/8D” and lightweight at 1.3 lbs.

MFJ-4416C manual

MFJ Born in the U.S.A.

MFJ Born in The USADoes it matter?
I was not born in the USA, but I am an American citizen. My dad served twenty-two years in the US military and ultimately gave his life for his country way too early for me. But he was proud of his service even in the volatile Vietnam years. And I certainly was proud of him, my hero.

Does it matter if we think “Buy US first?” I remember many small towns had signs that said “Shop Small Town First!” I think these days it does matter about buying small town and American first. MFJ doesn’t manufacture everything we sell in our plants, but over 75% of our product line is. We can’t say it is 100% American made but it is as close as it gets in ham radio circles. We employ American workers who build with their own hands our American engineered and manufactured finished goods.

Not many amateur radio businesses can say that. I am not hating. They built their business one way and we built ours the old fashioned way. From the ground up, on American soil, with American hands and as many American made parts that we can. So when it comes down to American made or foreign made, you can make your own choice.

If it does matter to you, know that MFJ is right here in Starkville, Mississippi with over 150 of its finest folks trying to make most of your ham radio gear right here on the grains of true U.S. soil. May God continue to Bless America!

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