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VI
INST ALLA TION
Power Supply
.
T
he
power supply circuit
is
in
-
tegral with
tht:
receiver.
Determine
line
voltage and
fr"yuency and
check
with
the
rattng
of the
receiver.
The
po\ver transforrncr prilnary
T1lity
he connected
for
anyone
o
f five
volt;lge
ran
ges
by
mea
ns
of
Cl
L1.
p
switch. This switch
is
l
o,·~te
d
in
the
rear
apron of
the
recei\'er~
and the
voltage for \vhich it is set
may
he
read directly
un
the .switch.
For Battery
or
other
Supply Operation
-
For
con-
nectio
ns sec
Sl'
hc.malic Diagram figure
11.
It
is only
neccss,lry
to
re
move
the
p
lug fro
m
th(~
socket on
the
rc;.tr
o
f the
n.::
-:.,;'
ivcr. ,mu
connect the
batteries
to
the
proper
tl~rrninid.s
as
indicilted
hy
thl~
schematic
dia
~
gr'\
n1.
A. hattcry cahle terminating
in
an
o::tal
male
plug IS
Il
ccc5sary for
thi5
purpose
.
A
vlbr;ltu
r
po\vcr
supply
MI
-S:;
I
9
i. available
w
h ich will
opera
te
the
receiver
uircctly from a 6 vDlt storage
hattery. For
inforl11,ltiOl1
011
this
110\vcr
unit
SI;'~C
Section XI.
Tubes
Inspect t
he
chas.,.
;
s
before applying
power
tu
see
that
all tuhes
arc firm ly
seated
in their
respec·
tive sockets.
Antenna
..
T
he
input Impedance
at
the ant
enna
terminals
is
desi.gned
to
match a
200
ohm
transml
s"
sion.
line or a strai gllt wire capaLity
t~:pc
antenna.
For
gl,;
~
neral
use
it
is
re cnmmcnut:d
t
h
at a
straight
\""1[('
an
tenna
hetween
25
an
d 50 fec
t
long he used
for
hands:'
to
6
inLlu
.s
ive~
an
d a
WI
fe
of
200
fCt~
t
or
more
for
hand
:;
1
and 2.
Speaker
-
Terminals
for connection
of
a
loud-
speaker are indicated
in
Figures
' 2
and 6. The
output
transformer
is
designed to match a speaker having
7.5
ohms
ilnpedance.
Headphone.,
A jack
is
proviueu
on
t
he
left of
t
he
front panel for
plugging
in
a pair of
headphones.
T
here
a
re
l\VLl
positions of
t
h
e
plug.
1. Half way in
-,--fo
r r
c:ct':ptio
ll
on hnth
speah::r
and
pho nes.
.
2.
F\llIy
in
ior phone
rece
ption
on ly.
See
"CIRCUIT
ARRANGEMENT"
"Output
Tube.
"
MO\lnting _.- The
instrument
may be
placeu
on
a
tahle
or mo unted
on
a
ral.".k. For rack
mou
ncin
g
loosen
the
p;tncl mounting
scr(~\\'s
anJ
remove
the
panel and
ch
assis
cn
mpletc
from
the
cabinet.
The:
panel
is
cquip
peJ.
with
slilll
c.larcl
sl()ts
for
rack mounting.
VII
OPERATION
Pigurc 3 illustrates
the
dials anJ
control
knohs.
TUNING
TONE
TRIINS.
OFF
"
ANT.
....
BFO
3
~-'.
(
(
,
,
~~
4
,
,
)
)
-
POWER
TRANS.
~
RANGE
RECEIVE
PHONES
-
5
VERNIER
TUNING
LOCK
4
R.F.GAIN
AoUDIO GAoIN
SELECTIVITY
Figure 3 Diagram of Fron' Pallel
8
NOISE LIMITER
BFO
MAN.N.L.
I
MAN
.,
I
A.V.C. N.L.
.
A.V.
c
.
NOISE LIMITER
AND
AV.C.
R-879E
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