Ramsey Electronics FZ-146 Specifications Page 87

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FX-146 87
FX SERIES TRANSCEIVER Simplified Receiver Block Diagram
LOW
PASS
FILTER
HIGH
PASS
FILTER
Q3
RECEIVE
PRE-AMP
BAND
PASS
FILTER
Q2
RECEIVE
PRE-AMP
FIRST
IF
MIXER
21.885 MHz
LOCAL
OSCILLATOR
LIMITER
21.4 MHz
FILTER,
AMPLIFIER
SECOND
IF
MIXER
6 POLE
455 KHz
FILTER
Q6
RECEIVER
MUTING
FM
DISCRIMINATOR
AUDIO
AMPLIFIER
PLL CONTROLLED
VCO
PROGRAMMED
21.4 MHz
LOWER THAN
DESIRED
RECEIVE SIGNAL
SPEAKER
ANTENNA
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