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.
2-Year NoMatterWhatWarranty
$ 159.95 Each
Recent Posts
Two radio amateurs win signal challenge
Congratulations to radio amateurs Mike Rupprecht from Germany and Edson W. R. Pereira from Brazil who rose to the challenge issued by ESA’s Education... Read more
Review of MFJ-1886 Rx-only Antenna
MFJ-1886 Loop Antenna Dig out previously unreadable signals and track down annoying sources of interference with the MFJ-1886 HF Receive Loop Antenna!... Read more
Antenna Yagi MB8 15-20 Separate Feed line – MomoBeam
The MB8 15-20 SF is a fullsize antenna for 14 MHz and 21 MHz. No traps or adapting systems where used to obtain fantastic performances and the best ba... Read more
![ARRL – Teachers Institute Overview [ Video ]](https://qrznow.com/wp-content/uploads/2017/03/CO-TI-1-2016-6742-1-190x122.jpg)
ARRL – Teachers Institute Overview [ Video ]
An Introduction to the ARRL Teacher’s Institute on Wireless Technology. Part of ARRL’s educational outreach to schools through our Educati... Read more
Chameleon Portable HF Antenna Deployment Configurations
There is no shortage of ways to deploy a Chameleon Hybrid-mini/micro antenna! In this video, I will show you some of the most common ways to deploy a... Read more
CW Gets the Message Through in Wake of Hurricane Irma
Any CW operator worth his or her salt will tell you that CW is the mode that gets through when all others fall short of the mark. CW certainly did the... Read more
EK100 – 100th Anniversary of Armenian Genocide
On April 24, 2015 armenian team of Federation of Radiosport of Republic of Armenia will be active on the air with callsings starting with EK100. This... Read more
Activation of linear transponder on EO-79
The AMSAT-NL transponder on EO-79 is being activated to support the International Lighthouse and Lightship Weekend (ILLW). UPDATE: as of 1515 UT Satur... Read more
Massive solar storm would pose considerable dangers – are we ready?
by Anthony Wood Across the globe, the scientific community and governmental bodies are preparing for the threat posed by the potential of a massive ge... Read more
Warning: file_get_contents(https://plusone.google.com/_/+1/fastbutton?url=https%3A%2F%2Fqrznow.com%2Fmfj-939i-plugplay200w-autotuner-hf-plug-play-auto-tuner%2F): failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in /home/qrznow/public_html/wp-content/themes/goodnews5/framework/functions/posts_share.php on line 151
