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
What is Morsel ?
Morsel is a simple RESTful API (aka HTTP API) and web interface for communicating viaMorse Code. The API was created with simple devices in mind, such... Read more
FCC Turns Down Petition to Amend Amateur Radio Identification Rules
The FCC has denied a Petition for Rule Making to amend Part 97 station identification rules to better accommodate and simplify station identification... Read more
Changes to the RSGB 50MHz awards
The RSGB Awards Manager has reviewed the current 50MHz awards offered by the Society and concluded that the existing 50MHz 2-Way Countries a... Read more
Alex Loop vs CHA-P-Loop vs Alpha Loop Whats best for you? K6UDA Radio Episode 33
http://www.alphaantenna.com The Alpha Loop http://chameleonantenna.com The CHA-P-Loop http://www.alexloop.com My Alex Loop Antenna http://www.elecraft... Read more
N1MM Free Logger – Version 1.0.6059 [ UPDATE ]
N1MM Version 1.0.6059 (February 8, 2017) Contest Logging Software Free Software for Phone, CW, and Digital Mode Fixed bug with AppInfo UDP packets bei... Read more
A New Way to compare HF antennas
Michael G0POT reviews WSPRlite with DXplorer Wondering how well your antenna works? WSPRlite with DXplorer will tell you… The WSPRlite is a spe... Read more
Diversity in amateur radio
‘But that’s not real radio!’ It’s not a new cry directed at FT8, DMR or Network Radio, but much older than that and often made whenever someone practi... Read more
Court Rules Excessive Antenna Application Fees Violated Reasonable Accommodation
Long-pending Amateur Radio antenna litigation that ARRL helped to fund has finally borne fruit. The Supreme Court of the State of New York, Appellate... Read more
‘Power Over Wi-Fi’ one of the year’s game-changing technologies
University of Washington engineers have developed a novel technology that uses a Wi-Fi router — a source of ubiquitous but untapped energy in indoor e... Read more
Enthusiasm Undimmed for International Lighthouse Lightship Weekend
The 23rd International Lighthouse Lightship Weekend (ILLW) takes place this weekend. The 2-day event begins at 0001 UTC on August 22 and continues unt... 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