BROEl &
KJ.ER
NCBrum
-
Denmark
2.1.
Frequency
Response
a.
ATIENUATOR:
"12000
mY"
MATCHING
IMP.
:"AII"
COMPRESSOR
SPEED:
"Camp.
Ofr
'
SWITCH
07
:
I'
Scanning
Off"
BANDWIDTH
SELECTOR:
"Sine"
METER
SWITCH:
"0.3
sec.
Output Volt."
FREQUENCY
SCALE:
"1000
Hz"
b.
Check all positions
of
MATCHING IMP.
except
IIAtt."
2.2.
Power
Output
MATCHING
IMP
.:
"6Q"
COMPRESSOR
SPEED:
"Camp.
Ofr'
SWITCH
07:
"Scanning Off"
BANDWIDTH
SELECTOR:
"Sine"
METER
SWITCH:
"0.3
sec.
Output Volt ."
FREQUENCY
SCALE:
"1000
Hz"
b. Check MATCHING
IMP
.
in
position
60 - 600 - 6000 Q
2.3.
Instability
OUTPUT
LEVEL:
"0"
SWITCH
07:
"Stand by"
2.4.
Attenuator
a.
ATIENUATOR:
"12000
mY"
MATCHING
IMP
. :
"All."
COMPRESSOR
SPEED:
"Camp.
Ofr'
SWITCH
07:
"Scanning Off"
BANDWIDTH
SELECTOR:
"Sine"
METER
SWITCH:
"0.3
sec.
Output Volt."
FREQUENCY
SCALE:
"200
Hz"
b.
FREQUENCY
SCALE
to "20000
Hz"
1024.2 - 1 .
65
Output
Amplifier
1024.2
val
id
from
serial no. 131481
Adjust the
OUTPUT
LEVEL
for
a
20
dB
deflection
on
type 1024.
Vary the frequency
from
20 - 20000 Hz.
Deflection
on
type 1024: 19.5 - 20.5
dB
If
necessary adjust C
103
.
As
under
item
a,
but
deflection
on
type 1024: 19.
3-20
.7 dB.
Check that apprax. 3 Watts can be obtained. Deflection above
21
dB
on
type
1024 in the entire frequency range 20-20000
Hz
with
a load
of
6 Q
connec-
ted
to
LOAD
terminals.
Possible reason
for
fault: too
low
LF
signal
on
OUTPUT
LEVEL
potentiometer
The
voltage
shou
ld
be
approx. 280
mY
.
If
not check item
3.4,
3.5
and
3.7.
As
under
item
a,
but with a load
of
60-600-60000
Q connected to
LOAD
ter-
minals .
Check that
the
amplifier does not stort oscillating when a 2
nF
condenser is
applied to the
LOAD
terminals.
If
necessary opply a condenser 0-500
pF
between 600 and 6000 Q terminals of
T 2
and
check frequency response again item 2 .1 .
Adjust the
OUTPUT
LEVEL
for
010
V deflection
on
type 1024.
Check all positions
of
ATTENUATOR
by
camporison
to
type 2107.
Toleronce::!: 2%
(+
tolerance
of
type 2107: 2%).
Check
and
tolerances
as
under
item
a.
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