• Plug & Play Auto Tuner . . . Plug & Play! You won’t even know it’s there . . .
  The MFJ-939K automatically tunes your antenna as you tune your radio. SWR is just always low. Tunes your coax fed or random wire antennas 1.8-30 MHz from 2 Watts QRP to full 200 Watts SSB/CW.
   

• Matches 6-1600 Ohms (SWR up to 32:1) -- that’s a 50% wider matching range than competing products that are less capable and higher priced . . . and it’s made in the USA.
   

• Highly intelligent, ultra-fast tuning! As you’re ragchewing, contesting or DXing, the MFJ-939 is learning your antenna and the way you operate and storing all this in its 20,000 memories. The more you use it, the more it learns.
   

• Measure & Compute = Instant Match MFJ-939 uniquely measures your antenna’s complex impedance (R, X), computes the L-network and snaps in needed components for instant matching.
   

• AdaptiveSearch . . . AdaptiveSearch determines a sub-set of all solutions that can provide a safe match and searches only that subset giving you an ultra fast match. Others search slowly through all solutions.
   

• InstantRecall . . . InstantRecall first checks its memory to see if you have operated this frequency before. If so, tuning is instantaneous and you’re ready to go!
   

• MFJ VirtualAntenna Memory . . . MFJ exclusive VirtualAntenna Memory system gives you 8 antenna memory banks of 2500 memories each. You can use an antenna switch to select up to 8 antennas and assign each antenna its own 2500 memories!
   

• 4 Times More Solutions and Faster! . . . MFJ has 256 values each of capacitance and inductance for 131,072 matching solutions giving you a finely tuned very low SWR. That`s 4 times the 32,768 solutions of competitors using only 128 L/C values each!
  
  Don`t be fooled by competing products claiming fast search times -- if you have a quarter of the matching solutions, of course, it takes less time to finish but it`s not faster.
  
  MFJ`s faster speed comes from advanced technology and software algorithms not from fewer solutions.
   

• Audio SWR Meter . . . An Audio SWR meter beeps when SWR <1.5, 2, 2.5, 3. Alarms if >3. Audible & Visible Diagnostic messages.
   

• Heavy-Duty Components . . . Heavy-duty L-network: 10 Amp/1000V relays, RF duty silver mica caps won’t burn up. Safe, reliable, continuous 200W SSB/CW.
   

• As Small as Your Radio . . . Tiny 6 1/2W x 2 7/8H x 8 3/8D”. 2.4 lbs. SO-239s, random wire antenna. & ground posts.
   

• Never Obsolete!
  If you get a new transceiver, simply order a new Plug and Play cable for that transceiver.

• PRINTED MANUAL INCLUDED!
   

MFJ-5114K - Kenwood interface cable is included.

The MFJ-5114K interface provides power and control signals between a Kenwood radio and the MFJ automatic tuner.

Supported Kenwood radios are TS-50S, TS-450S, TS-480HX, TS-570S, TS-690S, TS-850S, TS-870S, TS-2000, and any Kenwood radio that supports the Kenwood AT-300 tuner.

 

TWO YEAR NoMatterWhatWarranty
 

Note: This listing is for the MFJ-939K for Kenwood radios
 and comes with the MFJ-5114K cable.