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Alan 42


Adjustment

L3 Receiver
L4 IF 10.7MHz
L5 FM Discriminator (Demodulator)
L10 TX RF
L11 TX RF
L12 TX RF
L19 TX RF
CT1 Referency frequency
RV1 S-Meter
RV2 SQ
RV3 AM Modulation
RV4 FM Deviation (Modulation)
RV5 Power
RV6 RF-Meter

Connector

PinNameDescription
1BATT SWPositive Supply Voltage from ON/OFF Switch
2
3MICMicrophone signal to Mic. Amp.
4
5
6
7
8
9
10GNDNegative Supply Voltage
11
12
13
14SP VOLSpeaker Volume from Volume Control
15
16
17
18
19
20BATTPositive Supply Voltage from Battery

Modification

Frequency Band

A25.615-26055MHz
b26.065-26.505MHz
C26.515-26.955MHz
d26.965-27.405MHz
E27.415-27.855MHz
F27.865-28.305MHz
g28.315-28.755MHz
H28.765-29.205MHz
I29.215-29.655MHz
L29.665-30.105MHz

Komponent`s

KTC2078 Finale Transistor
KTC 1006 Driver Transistor
LC72322 CPU and PLL
TK10930 IF Amplifier and FM Discriminator
LM386 Audio Power Amplifier (AF Amplifier)
TDA2003 Audio Power Amplifier (AM Modulator)
Schematic Diagram (PDF)