Tabla de contenido
Crystals
Checked
Semiconductors
Checked
Inductors/RF Transformers/Relay
Checked
MFT-40 DSB Transceiver Kit
Ref.
Frequency
X1
7.200 ceramic resonator
X2
Ref.
Type
Transistors
Q1
BC547
Q2
BC547
Q3
P2222
Q4
BD135
Q5
2SC2078
IC's
IC1
SA/NE602
IC2
LM741
IC3
LM386
IC4
78L06
IC6
SA/NE602
IC7
78L06
IC8
78L08
Diodes
D1
1N4148
D2
1N4007 or 4001
D3
Zener 47V 1W
D4
Zener 9.1V
DV
SVC236
Ref.
Value/Type
L1
KANK3334 (5u3H)
L2
KANK3334 (5u3H)
L3
KANK3334 (5u3H)
L4
Not used
L5
2,7uH axial inductor
L6
KANK3334 (5u3H)
L7
FT37-43 toroid 10t - 3t see text
L8
100uH axial inductor
L9
FT37-43
L10
T37-2
L11
T37-2
RL1
DC12V Relay
Ident./Comment Circuit section Located
Ident./Comment
BC547
BC547
PN2222
BD135
2SC2078
SA602AN or NE602AN
LM741CN or UA741
Audio filter & preamp
LM386N-1
MC78L06
SA602AN or NE602AN
MC78L06
MC78L08
4148
1N4007(1)
BZX85C47 or Z47
Output Amp protect
9V1
Varicap diode
Ident./Comment
K3334 or 5u3H
K3334 or 5u3H
K3334 or 5u3H
--
red-violet-gold
K3334 or 5u3H
brown-black-brown
Output Amp Bias
toroid 8+8 see text
Turns = see text
Turns = see text
--
VFO
K/L-1/2
L-1/2
Circuit section
Located
Rx Mute
H-8/9
VFO
K-1
Pre Diver
E-5
Driver
E-8
Output Amp
B-5
Rx Mix
K-8/9
J/K-6
Audio Amp
I-6
Rx Mix 6V supply
L-7/8
DSB Generator
E-3
DSB Generator 6V
D-4/5
TX Bias supply
D/E-10
Rx/Tx Relay switch
C/D-9
Output Amp Bias
A-5
B-5
VFO
K-3
VFO
M-3
Circuit section
Located
Rx Mix
K-10
Rx Mix
I-10
Rx Mix
I-8/9
L3
VFO
J-2/3
TX Pre driver
E-6/7
Driver
C/D-8
C-6/7
Output Amp
A/B-7/8
LPF
B-9
LPF
B-10/11
Rx/Tx switch
C/D-10/11
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Tabla de contenido
