©2009 Hamtronics, Inc.; Hilton NY; USA. All rights reserved. Hamtronics is a registered trademark. Revised: 7/28/11
-Page 6-
U1- IF AMPL/DETECTOR/SQUELCH
IF SIGNAL
10.7 MHZ
_
+
TP-2
VOLUME
16 15 13
1 2
U2 - AUDIO OUTPUT
4 5 8 7
N/C
_
+
_
+
_
+
E2
SPKR OUT
E3
+13.6 VDC INPUT
C28
C29
C30
C31
C39
C40
C43
C35
C36
C37
C38
R8
R14
R10
SQUELCH
R15
R16
R20
R21
R22
FL5
Y2
L10
CR1
Q1 - RF AMPL
Q2 - MIXER
+8VDC
+8VDC
TP-1
OSC INJ
Q4 - MULT.
C1
C2
C4
C5
C6
C7
C8
C10
C15
C16
C17
C18
L1
L2
L3
L4
L8
L9
R3
R6
Y1
Q3 - OSC/MULT.
FL1
C9
L5
FL2
FL3
FL4
IF SIGNAL
10.7 MHZ
L6
Z1
Z2
Z3
Z4
J1
ANT
C3
R1
R2
C11
C12
C13 C14
C19
C20
C21
C22
C23
R4
R5
R7
C24
C25
C26
C27
R9
R11
cw
R12
R13
E4
COS OUTPUT
SIG. LEVEL
OSC.
E5
REPEATER AUDIO
FREQ.
OSCILLATOR ----------- MIXER --------------- ---------DETECTOR-------
E1
TP-3
Figure 2. R100 Receiver, Schematic Diagram
8-VOLT REG.
U3
L7
+8VDC
IF INPUT COS SQUELCH GATE NOISE AMPL AF OUT MUTE
3
CR2
R23
Q5 - INVERTER
R17
R18
R19
C34
C42
C41
DISC. OUTPUT
C32
C33
1,2
6
12 11 10
9 14
3 4 5
6 7 8
+8VDC
TP-4
