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current indicated
by
the
meter will not
be
more than
10
milliamperes.
If
it
is
higher
than
this value,
u,c
•
long
bakclite scre,.·dri,·er or socket wrench to
adjust the ncutrahting condenser,
c;1,
until.
the
load
current reaches
a
minimum. The transmitter tunin~ dial should be
tocked
back and forth
through
the tune
point during
this
adjustment to
ensure
1hal
lhe
p-• stsgc
is
kept in
lune.
RECEIVER SECTION
A
good
check
on
the operation of th• rec•"·er
section
JS
provided
by
colt•~• measurements
at
various points in the
circuit.
All ,·oltages should
:,e
taken
lo _eround, unless otherwise
sp«ified, with
a 1000 ohms-per-volt
·:oltmet<r and
should
be
within
plus or
minus
10% of th<
voltages
~iven
;clow.
New batteries
should
be
used
for this check. When checkina, volt•~••
11
other
points
than
those
given. allowances should be made
for
voltage
drop
.hrough resistances and transforrper coils.
Pin
.:t;
of Power plug
... .
.
.. .... . .. .. .. ..
180
volts
Pin .:!l:4 of Power
plug.............. ..
. ...
...............
... ...
......
I;,
Pin .:t
2
of
Power
plug
.. ................. .....
...................
..............
;
Across P,n .:!l:2
and
Pin
:fr7 of Vt
10
V6 inclusive
...
I
5
Junction of R3
I
and
C26
.... .
..
..
.. . .. . .. .. ....
..
...
100
Pin ::t4 of
Vt
and
V3....... .................................................
88
Pin ;#B of T2
.......
... .. ... .......
...
..... .. ...... .. ....... ....
..
..
08
Pin
·::t6
of
V2 (oscillator working)
. ..
60
Pin :i±6 of
V2 (oscillalor
not
working)..............
.............
62
Pin
:#3 of
V4
(switch SI on
C.W.)
..................... ..........
27
Pin
#3
of
v,
....... ...
... ..
.. .. ....
...
32
:OMPLETE AUGNMENT
Thie
nectssarv
eqoioment
lot
complete
ali'tnment of the tecelvc-c includes
.n accura1dy calibralcd sia,nal generator Md
a
,aood quality output
meter
•p•blc
of reading 10 milliwa11s across • 20,000
ohm load.
Proceed
as
follows:-
Conncct
the siJZnal
ecneralor,
by means of two
sho,1
leads,
10
chassis
,d
the ,erid of the
IA7GT
/G valve
at
the
t-•ng condenser.
TI1e
high side
of
" sii;nal
generator should have
a
.1 or
.05
.
~(. condenser in series with
'( k,d.
.
Connect the output meter to pins
Nos.
I and 4 of the AUDIO
connector
ith lhe Microphone•Hcadsct assembly disconnected. The controls should
: sci
as follows:·
ON-OFF S"•itch in ON pcsition.
SEND-RECEIVE switch
in RECEIVE
oosition.
PHONE-CW. switch
in
PHONE
pcsition.
P•nel volume control full
clockwise.
Dial at
5.8
megacycles.
Center section of
gang
shorted
10
ground.
12
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