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TYPE HKB RELAY AND CONTROL UNIT
R-12
R-11 RiO R-9 R-8
Fig. 10 - Internal Schematic Of The Type
REFER TO THE INSTRUCTION BOOK FOR THE ASSEMBLY
OF WHICH THIS UNIT IS A PART AND CARRY OUT THE
DIRECTIONS
THEREIN
FOR
RES ISTANCE
INTO
THE
HEATER
C IRCUIT .
C onnect a jump er wire acro s s
terminal s" #5
and #18 of the HKB control Uni t .
The adjusting c l ip on re s i stor R6 i s to b e set
roughly
in
the
c enter of the resi stor .
adjusting
c l ip s
on
the two adjustable
s i stors R23 and R 24 , which are external heater
resistors mount ed on a separate p anel ,
series
are
to
be set
so as to short out the
p o s sible
amount of the se re sistors .
transmitter amp l i fier
an
by insert ing
open circuit plug in
mit t er jack 8 .
The
tubes are
serted
into the HKB assembly of which the HKB
unit is a p art .
P lug
range into jack Jl and
amp ere
short ing
clips
of ext ernal resi stors R23 and
R24
to
obtain
the c orrect heater current as
given
in l ine #2 of
the tab le .
abl e t o keep the
amount
of these
two resistors about
1 4
R-27
INSERTING
MAXIMUM
TRANSMITTER-RECEIVER
The
re
least
open the
cathode
return circuit
trans
now
to b e in
a
d-e
ammeter of
1
adjust
the
It is de sir
short ed out of
each
equal so as
t o
HKB
JY
Control Unit For Type
distribute
the heat p roduc ed equally
them .
When
the
p ower is first app l i ed,
tube
heater
current will be above normal due
t o the low resistance
element s .
c onsequentl y ,
p l i ed for at l east two minutes before readings
are taken .
Aft er
the
HKB
contro l Unit and the heat er current of the
transmitter - rec eiver
have each been adjusted,
remove the
jump er
wire from t erminal s #5 and
#18 of
the HKB Uni t .
amplifier cathode circuit . )
3 .
Aft er the adjus tment s on the transmitter
have been c omp l eted and the
normal op eration measure again the heater cur
rent of the HKB Unit as Jack Jl .
in the l imit s
of l ine #3 in the Data
make such sl ight changes to the setting of the
ext ernal re s i stors R23
quired
t o
c orrect
i t .
should
be
c arri ed
out
rec eiver . )
6 -c -44 1 5
Carrier.
be tween
the
of
the
cold
heater
power shoul d be
ap
heat er current of
the
( C l o s e
the transmitter
transmitter is 1fL
I f not wi th
Table ,
and
R24 as may b e re
( A s imilar operati on
on
the transmitter
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