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R28 : 2K2 0.6W
R29 : 2K2 0.6W
R30 : 0R
R31 : 15K
R32 : 100K
R33 : 100R
R34 : 0R
R35 : 680R
R36 : 15K
R37 : 100K
R38 : 470R
R39 : 10R / 1W
JGND: 0R
If long input signal wires are used a low
input impedance can be useful.
In this case mount for RX a 680R (6-8-1)
resistor.
Check if your pre-amplifier can drive low
impedance!
Our K8021 is OK for low impedance.
Our K8020 is not suited for low
impedance driving.
Rx is normally left open.
5. Capacitors
C1 : 100nF (104)
C2 : 100nF (104)
C3 : 100nF (104)
C4 : 100nF (104)
C5 : 100nF (104)
C6 : 100nF (104)
C7 : 100nF (104)
C8 : 100nF (104)
(2 - 2 - 2 - 9)
(2 - 2 - 2 - 9)
(1 - 5 - 3)
(1 - 0 - 4)
(1 - 0 - 1)
(6 - 8 - 1)
(1 - 5 - 3)
(1 - 0 - 4)
(4 - 7 - 1)
(1 - 0 - 0)
c...
6. IC sockets. Watch the position
of the notch!
IC1 : 8p
IC2 : 8p
IC3 : 6p
7. 10W resistor
R40 : 4R7 (4.7, 4R7)
8. Capacitors
C9 : 2n2
C10 : 220n (224)
C11 : 1uF
C12 : 1uF
C13 : 2.2uF
C14 : 2.2uF
C15 : 100n / 250V
C16 : 100n / 250V
9. Transistors
T1: BC547
T2: BC547
construction
R...
5mm
(222)
(104)
(104)
7
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