Choppers Low pass filters Non ferrous
section section channels
D2
D1
C29 10nF
C16 39pF
Receive
C33 22nF
C39
R46 +5V
4.7uF
5.1k R45 1M IC8B
F ~ 11,13 KHz R29
R50 620k R65
100k 5 R55 4.7k
RX R26 7 2.2k Power supply
6
5.1k T3
6.2mH
C31
IC9B
Sens.
R48 IC10B
IC7B C17 IC4A +5V R5 2N3906
R33 R37 470nF +5V
6 47k LM393
- 5V Converter
220nF 10k
C15 6 20k 4066 100k 7 6
2
7 1 2 5 7
C4 T7
33nF 5 5
MC33178 100uF 2N3906
R57 -5V
TLC2262
+ D6
R27 R30 R52 150k 1 3
MC33178 C21 SENS 1M
C24
R6
5.1k 1k 10k 40%
100nF 10nF +9V
+5V
10k
D4 C5
R67
2 IC2
D7
100uF
+5V T4 1k
R53
R28
3IN OUT1
D3
1k
100k R66 C34
2N3904
LM2931
C28 10nF 100nF +
200
R7
C32 22nF BAT GND C6
C38
R1 R68
R44 2.2k
220uF
4.7uF C42 9V
R2 1.2k 5.1k R43 1M
10k
100uF
12k R49 620k +9V
Transmit
IC8A
IC9A
T1
C30
R47 LM393
IC4B IC10A R54 R14
2 2N3906 R32 R36 470nF
2 47k 2 4.7k
20
20k 4066 100k 1 2 1 C36
Audio Amp.
3 4 3 1 3
100nF
3
D5
C2 Threshold
MC33178
R3
C20
47nF
TLC2262
20k
C23 C25 R56 +5V R59 R61
100nF
100nF T6 C8
10nF R51 10k 1M 200k 100k
R15
220uF
C1 2N3906
5.1k
TX All
470nF
R42 R41 2
5.75mH THRESH
metal SW 1 & 2 T5
R60
1k 470k
IC3B R62
2.2k 2N3904
channel 100k
- Disc. SW1 6 20k
2
IC6B 7 2
Fosc ~ 10,15 KHz
5
TLC2262 - All Met. 3 1
R16
IC4C
R31 R35 4 -5V 150
- Retune U1 Jack
6 TLC2262
DISCRI 20k 4066 100k 7 1
8 9 5 2
C37
SW2
100k 40% R39 2
470nF 3
200k
R17
3 1
C19 C22 J2
Battery Check 100
C10 22pF IC6A RED GREEN
4
100nF 10nF
R18
TLC2262
R40 R58
150
R19 82k R38 S1
+5V
+9V
2.7M 200k
+5V SPK1
R11
2.7M 2
-5V
IC5B 1
C9 200k 8
3
R25 J1
IC7A
100pF R23 R69 LM393 -5V
Auto C35
20k
2 100k 27k
10nF R9
1 6
3 7
5 100k
R10
IC4D
IC3A R13 VOL
+5V 100k
MC33178 R64
2 4066 1k
1 10 11 220 ~ 470
10k
3
C12
R22
C14 IC5A
180pF R70 10k R8
20k
TLC2262
8.2pF LM393 C7
Discrimination
200k
10uF
2
1
3
R24
R34
68k
50K 3.5 Turns
47k R12
GND C18 +5V optional
D11
+5V
430k
22pF
C13
10pF
R4
R21
IC1 -5V
47k
10k
R20
VDD
1k
Q1
Ground Balance Q2
CLK D10
R63
Q3
100k 4024Q4
D9 for Fosc = 10,15 KHz
Q5
RESET
Q1 = 5 KHz
Q6
D8
T2
VSS Q7
Q2 = 2,5 KHz
Note:
2N3904
Q3 = 1,25 KHz
- All IC's except IC1 use + / - supply rails
Q4 = 625 Hz
- C39 C38 can be electrolytics
- RX Fosc ~ 11,13 KHz
- TX Colpitts Fosc ~ 10,15 KHz
Battery check modification (by Carl)
add R24 68k
change R11 200k => 2M
swap R8 - R9
Put a jumper properly on J1
Put a bicolor LED on J2
Tesoro Bandido II traced by Driscoll
You can add or not the pot in audio stage (220 ~ 470ohm)
Rev ID
to control the header volume (very useful for me).
1 Complete schematic
Date: 27 SEPTEMBER 2004Page: 1 of 1
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