MFJ -207 Manual

Thank you for purchasing the MFJ-207 HF/VHF SWR Analyzer.
The MFJ-207 gives you a direct readout of your antenna's SWR
without the need for formulas or indirect readings. The MFJ-207
can also be used to adjust a tuner to match your antenna without
the need for transmitting. The frequency coverage for the MFJ-207
is approximately from 1.75 MHz to 30 MHz in five bands. This
provides a very smooth reading of SWR at high frequencies. The
coverage for each band may slightly vary from the coverage labled
on the cover. The bands and coverage are:
The MFJ-207 requires the optional MFJ-1312B power supply
adapter or a nine-volt transistor battery. A power supply may
also be used by connecting a 2.1 mm plug to the cable with
the positive wire connected to the center pin and the ground
wire connected to the outer pin.
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NOTE: If you use a battery with the MFJ-207, use * an ALKALINE
nine-volt battery.
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To install batteries, remove the screws holding the cover
onto the case. Insert the batteries into the battery holder.
Tuck the battery snap wires out of the way so they do not
interfere with the tuning capacitor rotation. Reinstall the
cover and screws. The dial calibration is only approximate and
is for reference only. A frequency counter can be connected to
the FREQ. OUT jack (RCA phono) to get a more accurate reading
of the frequency. As an alternative to a frequency counter,
you can zero
APPENDIX A.

USING THE MFJ-207 HF/VHF SWR ANALYZER

Your MFJ-207 HF/VHF SWR Analyzer has many uses. It can be
used to find the resonant frequency of your antenna, to find the
SWR of your antenna at a particular frequency, and
find the frequency at which your antenna has the lowest SWR. You
can also use the SWR Analyzer to adjust your antenna to a low SWR
and to adjust an antenna tuner to match the transmitter to the
line.
Measurement of the antenna's SWR is done
input to the transmission line. There is no need to climb the
tower and measure the SWR at the antenna. Using the chart in
Figure 3, and knowing the line loss for your transmission line
and the SWR at the line input, you can determine the SWR at
the antenna, regardless of line length.

MFJ-207 HF/VHF SWR Analyzer

BAND A 1.75 -
BAND B 3.00 -
BAND C 6.50 -
BAND D 11.65 -
BAND E 18.00 -
beat the output
Page 2
3.00 MHz
5.00 MHz
11.70 MHz
20.00 MHz
30.00 MHz
with an HF receiver.
.
*
See
right at the