MFJ MFJ-817C - Introduction; Installation Guide; Connecting Transmitter and Antenna; Power Source Requirements

MFJ-817C
Deluxe
VHF/UHF
True
Peak
Reading
SWR/Wattmeter
Instruction
Manual
MFJ-817C
Deluxe
VHF/UHF
True
Peak
Reading
SWR/Wattmeter
Introduction
The
MFJ-817C
is
a
true
peak
reading
SWR/Wattmeter
designed
to
operate
on
144/220/440
MHz.
This
meter
uses
our
TrueActive
™peak
reading
circuit
to
read
true
peak/average
forward
and
reflected
power
and
SWR
simultaneously.
It
has
300/30
Watts
forward
and
60/6
Watts
reflected
power
scales.
The
MFJ-817C
utilizes
a
large
illuminated
three-inch
Cross-Needle
meter
to
read
the
SWR
from
1:1
to
00,
Installation
1.
Connect
your
transmitter
to
the
connector
on
the
back
of
the
unit
labeled
TRANSMITTER
and
your
antenna
to
the
connector
labeled
ANTENNA.
It
is
important
that
you
use
good
quality
coax
and
properly
installed
connectors.
2.
The
MFJ-817C
has
a
TrueActive
™peak
reading
circuit
that
requires
a
DC
power
supply
such
as
the
MFJ-1312B
in
order
to
function.
A
9
VDC
may
also
be
installed
inside
the
meter
with
a
battery
clip
that
is
included.
The
rear
panel
accepts
a
2.1
mm
coaxial
plug
with
the
center
conductor
positive
(+)
and
the
sleeve
negative
(-).
The
negative
lead
is
grounded
inside
the
meter.
There
is
no
need
to disconnect
the
battery
when
using
external
power.
3.
An
internal
lamp
backlights
the
meter
scale.
The
lamp
circuit
requires
12
VDC
and
will
not
illuminate
with
the
9
VDC
battery
alone.
4.
To
measure
the
power
output
capability
of
a
transmitter/amplifier
you
should
connect
a
quality
50-ohm
dummy
load
to
the
ANTENNA
connector
of
the
MFJ-
817C.