Circuit Description; Main Chassis - Yaesu FT-101E Instruction Manual

this transceiver.
CIRCUIT DESCRIPTION
The block diagram and the circuit description that follows will provide you with a better understanding of
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IF AMP NOISE AMP
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POWER SUPPLY
13.5v DC-DC CONV
———— TRANSMIT
—---—» RECEIVE
ONT.
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NB UNIT
40 DF 13.020
20 ADF 20,020
15 40F , 27,020
tt 4QF 33.020
! 10a 4k 34.020
F 108 40F 34520
I voc 40t 35,020
oo 4OF 25,520
wivdlTk is.020
VFO UNIT
8700 ~ 9200KHz
TUBE & SEMICONDUCTOR COMPLEMENT
HF Unit PB-1181(A-Z)
Ql RF amplifier
Q2 Receiver 1st Mixer
Q3 Transmitter 2nd Mixer
~ Q4 Local oscillator
Q5 Buffer
3SK40M
2SK19GR
2SC784R
2SC372Y
28C373
HIGH FREQUENCY IF Unit PB-1180 (A-Z)
Qi Transmitter 1st Mixer
Q2 Receiver 2nd Mixer
28C3/2Y
3SK40M
LOW FREQUENCY IF Unit PB-1183 (A-Z)
Q1_ IF amplifier
Q2_ IF amplifier
Q3 IF amplifier
Q4 AGC amplifier
Q5 S$ meter
2SK19GR
2SC784R
TA7045M
2SC828Q
2SC828Q ©
MODULATOR Unit PB-1184 (A-Z)
Q1_ IF amplifier
Q2 AM modulator
Q3 USB oscillator
Q4 LSB oscillator
Q5. CW-AM oscillator
Q6 Buffer
AUDIO Unit PB-1315 (A-Z)
Q1 MIC amplifier
Q2 MIC amplifier
Q3 Emitter follower
Q4 VOX amplifier
Q5_ Relay control
Q6 Relay control
Q7 CW side tone osc.
2SK19Y
2SC372Y
2SC372Y
2SC828P
2SC372Y
2SC372Y
2SK19GR
2SC372Y
2SC372Y
TA7042M
2SK19Y
28C373
28C373
Q8 AF amplifier
Q9 Pre amplifier
VFO Unit PB-1056 (A-Z)
Q1 VFO oscillator
Q2 Buffer
Q3 Amplifier
NB Unit PB-1292 (A-Z)
Ql IF amplifier
Q2_ IF amplifier
Q3 Noise amplifier
Q4 Noise amplifier
Q5 Noise amplifier
Q6 NB gate control
PROCESS FIX Unit PB1534 (A-Z)
Qi Amplifier
Q2. Limiter Amplifier
Q3 Amplifier (Process ON)
Q4 Amplifier (Process OFF)
Q5 Level Control
Qé ALC Amplifier
Q7_ Crystal Oscillator
REGULATOR Unit PB-1314 (A-Z)
Q1. 100 kHz oscillator
Q2 Flip Flop
Q3 Marker amplifier
Q4 Regulator
MAIN CHASSIS
V1 Driver tube
V2, V3 Final amplifier
DC-DC convertor
QI, Q2
AN214
2SC1000GR
2SK19GR
2SK19GR
2SC372Y
2SC372Y
2SK19GR
2SK19GR
2SC784R
2SK19GR
2SC372Y
2SK19GR
TA7060P
2SK19GR
2SK19GR
2SC372Y
2SK19GR
2SK19GR
2SC735Y
MFC-6020
2SC735Y
MFC-6034A
12BY7A
6JS6Cx2
2N4280x2
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