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RCI-2950 DX
RCI-2970 DX
TABLE OF
CONTENTS
CHAPTER 1
PAGE
SPECIFICATIONS
1.0
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CHAPTER 2
INTRODUCTION
2.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHAPTER 3
OPERATION
3.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1
Control & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2
Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CHAPTER 4
PROGRAMMING
4.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1
Frequency Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2
Frequency Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3
Offset Frequency Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CHAPTER 5
CIRCUIT DESCRIPTION
5.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1
PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2
Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3
Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4
Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CHAPTER 6
ALIGNMENT
6.0
Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1
Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
CHAPTER 7
MAINTENANCE
7.0
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.1
Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.2
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CHAPTER 8
DIAGRAMS AND PART LIST
8.0
PCB Layout & Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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RCI-2950 DX
RCI-2970 DX
CHAPTER 1
SPECIFICATIONS
1.0 GENERAL
Model
RCI-2950 DX / RCI-2970 DX
Frequency Range
12 meter : 24.8900 ~ 24.9900 MHz
10 meter : 28.0000 ~ 29.6900 MHz
Tuning Steps
100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz
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
0C to +40C
Microphone
400 ohm, Dynamic PTT
Meter Function
RF Output, RX Receive Signal Strength, SWR
Calibration and SWR
Input Voltage
13.8V DC
Antenna Connector
UHF SO239
Dimensions For : RCI-2950 DX
RCI-2970 DX
7-3/4”(W) x 10-3/4”(L) x 2-3/8”(H)
7-3/4”(W) x 10-3/4”(L) x 3-7/8”(H)
Weight For : RCI-2950 DX
RCI-2970 DX
4 lb. 3 oz.
7 lb. 6 oz.
1.1 TRANSMITTER
RF Power Output (RCI-2950DX)
AM/FM/CW : 10 W ; SSB : 25 W PEP
RF Power Output (RCI-2970DX)
AM/FM/CW : 50 W ; SSB : 150 W PEP
RF Transmit Modes
AM/FM/SSB/CW
Modulation
A3E/16F3/J3E/A1A
Spurious Emissions
-50 dB
Carrier Suppression
-50 dB
Antenna Impedance
50 Ohms
1.2 RECEIVER
Sensitivity For 10dB S/N (AM; CW/SSB)
Sensitivity for 12dB S/N (FM)
< 0.5mV; < 0.15m V
< 0.25mV
Image Rejection Ratio
-65 dB
Automatic Gain Control (AGC) Figure Of Merit
SSB/CW/AM : 80 dB for 50 mV for 10 dB Change in
Audio Output
Audio Output Power
2.5 W @ 10% THD
Built-in Speaker
8 Ohms, 5 Watts.
External Speaker (Not Supplied)
8 Ohms; 5 Watts.
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
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RCI-2950 DX
RCI-2970 DX
CHAPTER 2
INTRODUCTION
2.0 INTRODUCTION
The Ranger RCI-2950 DX / RCI-2970 DX is a solid-state, fully synthesized Amateur 10 and 12 meter
dual band mobile transceiver with full band coverage from 28.0000 MHz to 29.6999 MHz and 24.8900
MHz to 24.9900 MHz and all mode operation, including: AM, FM, USB, LSB, CW and PA modes.
The 10 most commonly used frequencies can be pre-programmed by the user for easy channel access.
2.1 RCI-2950 DX / RCI-2970 DX FEATURES
• 25 Watts PEP of Output Power (RCI-2950 DX)
• 150 Watts PEP of Output Power (RCI-2970 DX)
• Full Band Coverage
• All Mode Operation
• Brightness Control
• CTCSS Encoder/Decoder (Optional)
• Repeater/Offset Switch
• Programmable Frequencies
• Built-in Dual VFO
• RIT (RX Incremental Tuning)
• Squelch
• Noise Blanker
• RF Gain Control
• RF Power Output Selector
• External Speaker Connection
• PA Mode
• LCD Display
• Multi-Function LCD Meter
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RCI-2950 DX
RCI-2970 DX
CHAPTER 3
OPERATION
Figure 3-1 Front Panel
3.0 INTRODUCTION
This section explains the basic operating procedures for the RCI-2950 DX / RCI-2970 DX Amateur 10
and 12 meter dual band mobile transceiver.
3.1 CONTROL AND CONNECTIONS
3.1.1 FRONT PANEL
Refer to the above Figure 3-1 for the location of the following controls.
1. FREQUENCY SELECTOR
This control is used to select a desired transmit and receive frequency.
2. RF POWER CONTROL
This control allows the user to adjust RF power output.
3. MIC GAIN CONTROL
Adjusts the microphone gain in the transmit and PA modes. This controls the gain to the extent that full
talk power is available several inches away from the microphone. In the Public Address (PA) mode, the
control functions as the volume control.
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4. ON/OFF VOLUME CONTROL
This knob controls the volume and the power to the radio. To turn the radio on, rotate knob clockwise.
Turning the knob further will increase the volume of the receiver.
5. SQUELCH CONTROL
This switch is used to eliminate background noise being heard through the receiver which can be
disturbing when no transmissions are being received. To use this feature, turn the switch fully
counterclockwise and then turn clockwise slowly until the background noise is just eliminate. Further
clockwise rotation will increase the threshold level, which a signal must overcome in order to be heard.
Only strong signals will be heard at a maximum clockwise setting.
6. RF GAIN CONTROL
This control is used to reduce the gain of the RF amplifier under strong signal conditions.
7. CLARIFIER CONTROL
Allows tuning of the receive frequency above or below the assigned frequency by up to 500 Hz.
Although this control is intended primarily to tune in SSB/CW signals, it may be used to optimize
AM/FM signals.
8. MODE (FM/AM/USB/LSB/CW/PA) SWITCH
This switch allows you to select one of the following operating modes: FM/AM/USB/LSB/CW/PA.
9. NB/ANL BUTTON (NB/ANL)
In the NB/ANL position, the RF Noise Blanker and Aotumatic Noise Limiter in the audio circuits are
also activated. The Noise Blanker is very effective in eliminating repetitive impulse noise such as
ignition interference.
10. ROGER BEEP BUTTON (R.BEEP)
In the Roger Beep position, the radio transmits an audio tone at the end of your transmission to indicate
that transmission has ended. As a courtesy to others, use the Roger Beep only when necessary.
11. SPLIT BUTTON (SPLIT)
This control activates the offset frequency function. It causes the transmit frequency to be offset either
above or below the receive frequency by a user programmable amount to allow operation of an FM
Repeater.
12. PROGRAM BUTTON (PRG)
This button is used to program operating or scanning frequencies into memory. See the OPERATION
section of the manual for further details.
13. MANUAL BUTTON (MAN)
This is used to return the unit to manual mode.
14. SHIFT BUTTON (SHF)
This is used to select 100 Hz, 1 KHz, 10 KHz, 100 KHz or 1 MHz frequency steps.
15. DIM BUTTON (DIM)
This button adjusts the display backlighting in four different steps to best match the ambient light.
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