Description
MFJ-939I: The MFJ-939 Plug & Play Auto antenna tuner, you won’t even know it’s there MFJ-939I/K/Y 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 rag chewing, 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.
Adaptive Search 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 Virtual Antenna Memory:
MFJ exclusive Virtual Antenna 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.
Audio SWR Meter:
An Audio SWR meter beeps when SWR 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-39s, random wire ant. & and posts.
Super Versatile! Works with ALL older rigs, classic transmitters, Flex, Elecraft, Tentec, QRP, others. Autotune antenna — touch tune button on any MFJ-939I/K/Y for any rig.
