MFJ AutoTuner Extender MFJ-914 User manual

MFJ-914 AutoTuner Extender
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MFJ-914 AutoTuner Extender
General Information:
Does your automatic antenna tuner have limited matching range? Can't
auto-tune your antenna on all bands? Do you have to pre-tune your
antenna with a manual tuner?
The MFJ-914 AutoTuner Extender
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greatly extends your automatic
tuner's matching range. Now you can match nearly any antenna
automatically!
The MFJ-914 s a heavy duty, wide range impedence transforming
device. It has been carefully designed for the flattest frequency response
and the lowest loss.
MFJ's AutoTuner Extender
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transforms your antenna impedence -- up
or down -- by as much as 10 times! The MFJ-914 puts nearly any
antenna into the matching range of your automatic tuner!
Extend your power range by transforming your antenna impedence so
your tuner can be used in a higher power Low-Q mode. The MFJ-914
also extends manual antenna tuners.
You can use any tranceiver from 160 through 10 meters with up to 300
watts.
Installation:
The MFJ-914 connects in-line between your transmitter and antenna.
Connect your transmitters antenna output to the SO-239 connector
labeled Transmitter, and your antenna to the Antenna connector. For
maximum protection of your tranceiver, a 50 Ohm dummy load should be
connected to the plug labeled Dummy Load, and the Ground stud
connected to a good RF ground.
Operation:
The MFJ-914 AutoTuner Extender is easy to use! First, bypass your
transmitters auto-tuner. Then, while transmitting at a low output power,
adjust the knob (from position Athrough G) on the MFJ-914 until you see
minimum SWR on your transmitter. Now you're ready to autotune. The
Off / Dummy Load position on the knob protects your tranceiver by
connecting it to an external dummy load, and by grounding your antenna
to bleed off static. The switch position Dprovides a through connection
from your transmitter to your antenna.

MFJ-914 AutoTuner Extender
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MFJ-914 Front Panel
Technical Assistance
If you have any problem with this unit first check the appropriate section
of this manual. If the manual does not reference your problem or your
problem is not solved by reading the manual you may call MFJ Technical
Service at 601-323-0549 or the MFJ Factory at 601-323-5869. You will
be best helped if you have your unit, manual and all information on your
station handy so you can answer any questions the technicians may ask.
You can also send questions by mail to MFJ Enterprises, INC., P.O. Box
494, Mississippi State, MS 39762; by FAX to 601-323-6551; through
Compuserve at 76206,1763; or by email to
[e-mail]. Send a complete description of your
problem, an explanation of exactly how you are using your unit, and a
complete description of your station.