Ranger_rciss 3900eghp Cb Tranciever_service Manual

 
 
 
SS-3900EGHP  
 TABLE OF  
CONTENTS 
 
 
 
 PAGE
CHAPTER 1  
SPECIFICATIONS  
1.0  General  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2 
1.1  Transmitter  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2 
1.2  Receiver  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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SS-3900EGHP  
 CHAPTER 1 
SPECIFICATIONS 
 
 
 
1.0 GENERAL  
Model SS-3900EGHP 
Frequency Range  10 Meter: 28.015 ~ 28.465MHz 
Emission Modes  AM(A3)/FM(F3)/LSB,USB(A3J)/CW(A1) 
Frequency Control  Phase Lock Loop (PLL) synthesizer 
Frequency Tolerance 
± 0.005 % 
Frequency Stability 
± 0.001 % 
Operating Temperature Range 
-30°C to +50°C 
Microphone 
Plug-in (4 pin), Dynamic PTT, 500 Ω 
Meter Function Meter shows relative signal strength, RF output power 
and SWR level.
 
Input Voltage 
13.8V...

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SS-3900EGHP  CHAPTER 2 
OPERATION 
 
 
 
 
Figure 2-1 Front Panel 
 
2.0 INTRODUCTION 
This section explains the basic operating procedures for the SS-3900EGHP Amateur 10 meter mobile 
transceiver. 
 
2.1 CONTROL AND CONNECTIONS 
 
2.1.1 FRONT PANEL 
Refer to the above Figure 2-1 for the location of the following controls. 
 
1. ON/OFF VOLUME CONTROL 
This knob controls the volume and power to the radio. To turn radio on, rotate the knob clockwise. 
Turning the knob further will increase the...

- 3 -  4. RF GAIN CONTROL 
This control is used to reduce the gain of the RF amplifier under strong signal conditions. 
 
5. ECHO/TIME CONTROL 
This control is used to control the echo effects. 
 
6. BAND SELECTOR 
This switch is used to select the band. 
 
7. MODE SWITCH 
This switch allows you to select one of following operating modes: CW/FM/AM/LSB/USB. 
 
8. COARSE/FINE CONTROL 
Allows tuning of the receive or transmit frequency above or below the channel frequency. Although 
this control is intended...

- 4 -  Figure 2-2 represents the location of the following connections: 
 
 
Figure 2-2 Rear Panel 
 
1. ANTENNA 
This jack accepts a 50 ohms coaxial cable with a PL-259 style plug. 
 
2. POWER 
This accepts 13.8 VDC power cable with built-in fuse. The power cord provided with the radio has a 
black and red wire. The black goes to negative and the red goes to positive. 
 
3. F.C. 
This connector is used for an external frequency counter which indicates the frequency of the selected 
channel. 
 
4. CW KEY...

- 5 -  The receiver and transmitter are controlled by the push-to-talk switch on the microphone. Press the 
switch and the transmitter is activated, release switch to receive. When transmitting, hold the 
microphone two inches from your mouth and speak clearly in a normal voice. This transceiver comes 
complete with a low impedance dynamic microphone. 
 
2.3 OPERATION 
 
2.3.1 PROCEDURE TO RECEIVE 
1.  Be sure that power source, microphone and antenna are connected to the proper connectors before 
going...

- 6 -  For best results, the user should select a low-impedance dynamic type microphone or a transistorized 
microphone. Transistorized type microphones have low output impedance characteristics. The 
microphones must be provided with a four-lead cable. The audio conductor and its shielded lead 
comprise two of the leads. The third lead is for transmit control and fourth is for receiving control. The 
microphone should provide the functions shown in the schematic below (Figure 2-3).  
 
 
4 WIRE MIC...

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SS-3900EGHP CIRCUIT 
DESCRIPTION  
 
 
 
3.0 INTRODUCTION 
This section explains the technical theory of operation for the SS-3900EGHP Amateur 10 meter mobile 
transceiver. 
 
3.1 PLL CIRCUIT 
The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator 
signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC5, IC10, TR24, 
TR25 and TR26. The PLL circuit is programmed by the rotary channel switch GPS-0501. The GPS-
0501...

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 CHAPTER 4 
ALIGNMENT