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Low Band Circuit Board/Schematic Diagrams and Parts List 9-399

0.78 Vdc

-24.5 dBm

3.24 Vdc

33 mV

3.25 Vdc

-24.5 dBm

-26.5 dBm

-18.75 dBm

PREAMP

LP FILTER

MIXER

56pF

C515

C536

27pF

3.6K

TP500

R510

XFMR

T502

Q509

C516

HP415

D501

30pF

150nH

L501

39pF

C533

82pF

C538

R505

560

2pF

C535

L504

560nH

R504

12K

D502

R503

C506

100pF

L507

68nH

L508

150nH

R512

4.7K

SHIELD

SH500

SHIELD

SH501

R507

270

T501

270nH

L502

XFMR

.01uF

C522

SHIELD

SH502

R509

270

1uH

3.9pF

C537

L503

R508

C534

8.2pF

0.1uF

R513

C507

X_IN

RX_INJ

C504

51pF

RECEIVE -47dBm SIGNAL AT 35.04MHz WITH 1K TONE.

RF MEASUREMENTS MADE WITH BOONTON 92 MILLIVOLTMETER.

FL0830471O

Figure 9-246. Low Band (29.7-42/35-50 MHz) Receiver Front End Schematic Diagram

Default Chapter2
Chapter 1 Introduction25
Chapter 2 Radio Power Distribution29
- Figure 2-1. DC Power Distribution Block Diagram29
Chapter 3 Keypad31
Chapter 4 UHF Band 1 Theory of Operation35
Chapter 5 UHF Band 2 Theory of Operation43
Chapter 6 VHF Theory of Operation51
Chapter 7 Low Band, 800 Mhz, Passport & 900 Mhz Theory of Operation63
Chapter 8 Maintenance91
Chapter 9 Schematic Diagrams, Overlays, and Parts Lists151

Battery Type	Li-Ion
Waterproof	IP54
Operating Temperature	-30°C to +60°C
Frequency Range	VHF: 136-174 MHz
Number of Channels	16

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