Input FrequencyWaverange Input Set tuned to Adjust Measure on Scope / Counter
OSCILLATOR
FM - RF
VCO
AM -RF
AM - IF
FM
1)
87,5 - 108 MHz
MW
525 - 1607 kHz
(530 - 1710 kHz)
2)
87,35 MHz
512 kHz
(525 kHz)
1635 kHz
(1720 kHz)
108,25 MHz
lower
band end
upper
band end
FM
87,5 - 108 MHz
87,5 MHz
108 MHz
108 MHz 2106 C2
5101
MW
468 kHz
5106
5108
FM 98 MHz 98 MHz
3101
152 ±1 kHz
3)
2106 C1
2106 C3
5104
5105
MW
560 kHz
1500 kHz
2106 C4
5102
(ferroceptor coil)
560 kHz
1500 kHz
connect pin 24 of
IC 7101 (AM Osc)
with short wire to
ground
2)
for USA /17
Tuner Adj. EVA, 021097
see
remark
4)
4)
RC-network serves for damping the IF-filter while adjusting the other one.
A
1 2
1 2
∆f = ±500kHz
V
RF
= 100µV
C
∆f = ±30kHz
V
RF
= 100µV
lower
band end
upper
band end
f
o
f
o
max.
symmetric
or
A
1
3
2
∆f = ±500kHz
V
RF
= 10µV
A
continuous
wave
V
RF
= 1 mV
or
C
1 2
∆f = ±15kHz
V
RF
= 10mV
or
or
1 2
B
∆f = ±30kHz
V
RF
as low as
possible
f
o
max.
symmetric
or
max.
V
cc
7101
pin 30
2k2
4k7
220R
100nF
10
IC 7101
220R
100nF
14
IC 7101
repeat
TUNER ADJUSTMENT TABLE
87,5 MHz
1)
Check if capacitor 2109 stands upright before starting adjustments.
3)
If sensitivity of frequency counter is too low adjust to max. channel separation
(input signal: stereo left 90% + 9%, adjust output on right channel to minimum).
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