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TRC-70
TX-RX UNIT (X57-3470-10)
Component
Use/Function
Operation/Condition/Compatibility
IC1
Noise blanker
IC2
IF
10.695MHz IF 2nd stage. SSB, AM detection with AGC amplifier.
IC3
Squelch
1C4(1/2)
S-meter amplifier
IC5
Audio power amplifier
ICé6
Transmit balanced modulator
§:MICinput
3: Output
7: Carrier input
IC7
Transmit 1st mixer
1: Output 71.295MHz
2: Local input 60.6MHz
5: IF input 10.695MHz
1C8(1/2)
ALC amplifier
Controlled ALC voltage by FWD voltage.
1C8(2/2)
ALC amplifier
Protect for Q50 G2 voltage dropped when abnormal.
Icg
Receive B.P.F select
Converted to parrallel data from serial data.
IC10
Select
MODE, RF power select. Converted to parrallel data from serial data of L.P.F
information.
1011
gv AVR
Input SB line output 8V.
Q1
BPF8 switching
Turn ON when received 18.0000~30.0000MHz.
*( Q2
BPF7 switching
Turn ON when received 14.0000~17.99899MHz.
Q3
BPF6 switching
Turn ON when received 9.0000~13.9999MHz.
Q4
BPF5 switching
Turn ON when received 7.0000~8.9999MHz.
" Q5
BPF4 switching
Turn ON when received 5.0000~6.9899MHz.
Q6
BPF3 switching
Turn ON when received 3.0000~4.9999MHz.
Q7
BPF2 switching
Turn ON when received 1.6000~2.9999Mhz.
@}:)
BPF1 switching
Turn ON when received 0.1~1.5999MHz.
09. 10
Receive Ist mixer
0.1~30MHz "& ~ 71.295MHz
71.395MHz~101.295MHz
Q11
1st mixer switching
Turn ON in received.
Q12
ist [F amplifier
71.295MHz.
29
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