MFJ-939I PLUG AND PLAY 200 Watt HF automatic tuner with iCOM cable

MFJ-939I

PLUG AND PLAY 200Watt HF,W automatic tuner with iCOM cable

Plug & Play Auto Tuner
Tunes 1.8-30 MHz coax-fed and/or random wire antennas from 2 Watt QRP up to 200 Watt SSB / CW.
It matches impedances from 6 to 1600 Ohms (SWR up to 32:1) - which is a 50% wider matching range than competing products that are less capable and more expensive. . . and it is made in the USA.
Very smart, ultra-fast tuning!
20,000 memories. The more you use it, the more you learn.

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

AdaptiveSearch
AdaptiveSearch determines a subset of all solutions that can provide a safe match and searches only gives subset
It's ultra fast. Others, however, slowly look for all the solutions.

InstantRecall
InstantRecall first checks its memory to see if it has operated on this frequency before. If so, tuning is instant and you are ready to go!

MFJ VirtualAntenna Memory
MFJ's exclusive VirtualAntenna memory system gives you 8 antenna memory banks of 2500 memories each.
You can use an antenna switcher 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 corresponding solutions giving a very low SWR tuning.
Don`t be fooled by competing products claiming fast search times – if you have a quarter of matching solutions, of course, it takes less time
MFJ`s increased speed comes from advanced technology and software algorithms and not from fewer solutions.

Audio SWR Meter
An Audio SWR meter beeps when SWR <1.5, 2, 2.5, 3. Alarms if > 3. Audible and visible diagnostic messages.

Heavy Components
Heavy L-mains: 10 Amp/1000V relay, RF duty silver mica caps. Safe, reliable, continuous 200W SSB/CW.

Small like the radio
Small 6 1/2W x 2 7/8H x 8 3/8D". 2.4 lbs. SO-239
Truly Plug & Play! No settings, just one cable to plug in! Order MFJ-939I, Icom; MFJ-939K, Ken; MFJ-939Y, Yaesu. Specify Yaesu: FT-100/450/950/857/897/1000MP/9000/2000 or other.

Super versatile!Works with all older systems, classic transmitters, Flex, Elecraft, TENtec, QRP and others.

Plug & Play Auto Tuner

Plug & Play! 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 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-39s, random wire ant. & gnd posts.

Never Obsolete. . . Super Versatile
Truly Plug & Play! No settings, only one cable to plug in! Order MFJ-939I, Icom; MFJ-939K, Ken; MFJ-939Y, Yaesu. Specify Yaesu: FT-100/450/950/ 857/897/1000MP/9000/2000 or other.

Never Obsolete!

If you get a new transceiver, simply order a new Plug and Play cable.

Super Versatile! Works with ALL older rigs, classic transmitters, Flex, Elecraft, Tentec, QRP, others. Auto tune antenna -- touch tune button on any MFJ-939I/K/Y for any rig.