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0)
Adjustmtnt of the
COUPLING control
should
be such
that the
tune point can
be
found within
the ranse of the tuning condenser
and that this tune point dots
not
occur exactly
a.t
either ma.ximwn
or minimum capacity.
(4)
Normal
plate current with
the
output
circuit
in
tune should not
exceed 40 ma - normally b<lwccn
2)
and 35 ma.
(5)
Rttuning
must be carried out eve<y
time
the fre<juency
and/or
the
antenna length is changed.
In order_ to facilitate the rapid selling up of
any
frequency with • given
antenna,
it
is
,uggested that • small chart be m1de and filled in, at this time,
listing
the settings of the two controls on each frequency, and recording the
length
of antenna
in
wr:.
·
ROUTINE
OPERATION
Once the
transmitter
section of the equipment
hu
been properly tuned
with
a .given antlnna
length and
Olll
given
frequencies
in
accordance with
the
de-script1on
in
the
pr«eding s~ion.
the
routine
opcr1tion
of the· unit
is
.
ve<y
simple.
When
fixed or serni-6xcd station
operation is desired. set the transmittcr-
receiv_cr and the batteries
in the
de,ired operating
location,
open the doors
of
the
transmitter-receiver
case and
bring
the appropriate batte<y
cable
into
it
through
the
opening.
in
the
bottom of
the case. Connect it and
the
M,crophone,Headsct
Assembly
to
the,c
respective
sockets.
Erect
the
rod
antenna or
the
single wire antenna. as
required,
and connect on
a g,ound
wi,re.
Move
the power switch
to
ON and manipulate
the rcceivez
tunin3
1nd volume controls
to
receive the de.sired signal.
To transmit
o
n
Phone,
press the
microphone button
and
check
that
the
meter reads 2.0
volts
in the TRANS FIL p9$ilion of the
meter
switch
and
between
2)
and 3}
R)•
in
the
,TRANS TUNE position_ (The
transmitter
tuning controls ha•ing Jim been set
for the required fr«juency). Talk
into
the microphone at
an
average
room
level,
holding
it
at nght angles
to, but
dose
lo,
the_
lip!-
Relea~_the button again t? receive.
.
To transmit on
·, :;._;,
plug
the.cabJe •from
the
key
into
the
KEY
jack·
,
move lhc SEND,R.E<::EJVE
_
switch'
to
SEND/ind
proceed with the trans,
missioo. Return to:•RE;C~IVE
wb;n
ihe
•trinsniission
is completed.
(Note
that th; key cable li)u.st be 'removtd
'
from
'.it.s
jack
for
Phone
transmissions,
O'.htrwise the
modu,lator•v_alves will
be
inoper•tive.)
·
For
portablc-;;pe;a·
i ioo of ;he.
.
cqui;,ment, the light duty battery
is
plugged-in, and the
,
Microphone-Headset
cable taken out through the
•p«ture in
the
bottom of the rue. Before setting
Out,
the rod antenna
should
be
extended to .the required height and the tuning adjustments of
both
the transmitter and receiver section, made for
the
desired fre<jutncies
JS
for fixed sl•tion
opeution
above. As
pm·i0usly si.ted, for portable
>peration
the final adjustments should
not
be
made with the unit resting
l11ectly
on
the ground. The
tuning
dials then may be Jocked in position,
he
doors
of
the
ca~ closed, a.nd the
'canvas
covering secured in pl11cc.
10
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