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.
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.
News
WRTC 2023 AWARD : January 2023…headset on!
WRTC Organizing Committee is proud to announce a 2023 edition of WRTC 2023 AWARD! This is NOT WRTC 2022 Contest that will be held in Bologna in July 2... Read more
Dayton Hamvention Announces Theme for 2023
Dayton Hamvention® 2023 is just over 6 months away, and next year’s Hamvention team has selected “Innovation!” as the event theme. T... Read more
The 2023 ARRL Calendar
Keep track of your important dates, ARRL contests, and holidays with a 2023 ARRL Calendar. This year’s calendar features Collegiate Amateur Radi... Read more
The Secret Government Radio Signals I Heard Today!
The Secret Government Radio Signals Read more
Radio Amateurs Support the Great ShakeOut 2022 in Puerto Rico
Students from the Crop Protection Student Association at the University of Puerto Rico in Mayagüez participated in a communications practice session a... Read more
Antenna
CHA MPAS LITE: CHAMELEON DESIGNS A NEW QRP COMPACT PORTABLE ANTENNA SYSTEM
The CHA MPAS LITE is the little brother of the CHA MPAS 2.0 – the most popular Modular Portable Antenna ... Read more
40 METER 1/4 WAVE VERTICAL WIRE-MONOPOLE by W8AMZ
The W8AMZ 40m Vertical Wire Monopole antenna uses just three elements, a vertical driven element and two counterpoise radials, to deliver outst... Read more
MIDI LOOP – 3,5 a 14,5 MHz
See More: Link Read more
NTE Low Temp Solder Wire Connections
DX Engineering carries the NTE Low Temp Solder Wire Connectors. All you need is a heat gun to make solder connections between wires. Four sizes for wi... Read more
HF Portable Vertical Antenna MP1R SuperWhip
The MP1R is an MP1B with an SW1 SuperWhip Ruggedized Antenna Whip on the top of it. New! Free! Every MP1R Super Antenna now comes with a free FG1 Freq... Read more
Review
Yaesu FT 710 First Look
Yaesu FT-710 AESS has finally arrived at Ham Radio Outlet. Join Ham Radio Sensei, Julian Frost (N3JF) as he gets his hands on the new radio for the fi... Read more
Yaesu FT-450 HF and 6 Meter – QST – ARRL Product Review
Yaesu FT-450 Reviewed by Rick Lindquist, N1RL ARRL Contributing Editor The FT-450 is Yaesu’s latest entry in the HF/50 MHz transceiver field. It’s a s... Read more
![PSK31 Digital Mode [ Video Tutorial ] – QRP School](https://qrznow.com/wp-content/uploads/2016/06/0115-265x168.jpg)
PSK31 Digital Mode [ Video Tutorial ] – QRP School
Photo: W7RN This is a comprehensive intro to the PSK31 digital mode. It’s all of the major concepts and some demonstration crammed into a 30 min... Read more
Boeing Antennas
Aircraft antenna Aircraft antennas , Garmin, AeroAntenna Technology, and more Com Antennas, Couplers, Diplexers, Combiners, DME/Transponder Antennas,... Read more
Equipment
New RFinder B1, Advanced VHF/UHF 4 Watt DMR/Analog Ham Radio Smartphone, NO CODE PLUGS NEEDED!!
“My switch back from iPhone to RFinder happened in this video. A dual band VHF/UHF radio with a newly designed receiver for better sensitivity,... Read more
TEN-TEC 80 Meter QRP Transceiver Kit – Model 1380
Enjoy the world of QRP CW operation with one of our single band transceiver kits. Available for 80 meters. 3 watts power output. Easy to build and sim... Read more
IC-905 VHF/UHF/SHF SDR Transceiver Pre-release
IC-905 Icom will announce an exciting industry first at the Tokyo Hamfair which opens on 20th August 2022. Based on its SHF project, the IC-905 VHF/UH... Read more
FX-4C Transceiver
The FX-4C is a new SDR transceiver developed by BG2FX. It covers all of the major HF bands, and includes wide-band receive capabilities. I... Read more
Alpha 4040 DreamTuner
“In the last 45 days, we’ve made a lot of progress on the Alpha 4040 DreamTuner. As you know, when we tested the tuner under full... Read more
