Ranger RCI-2970
Documentation Project
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PLL Alignment  
PLL Alignment Locations

SETTINGS CONNECTION
ADJUST
ADJUST FOR
Remove TP1, TP2, TP3 Jumper PCB.
VCO & OSC: 
Frequency: 28.0000 MHz
MIC Gain: Fully counter-clockwise
RF Power. Fully clockwise
RF Gain: Fully clockwise
Clarifier: 12 o'clock
Vol : Comfortable level
Squelch: Fully counter-clockwise
Mode selector - AM		 Disconnect shorting board from test points TP1, TP2 and TP3
 

Connect Freq. Counter to L61 

 
 

VC1
 
 

Adjust for reading of 
10.240MHz  ± 10Hz.
Connect Oscilloscope to L61
L4
Adjust for Max. 
Connect a Freq. Counter to L65
VC2
Adjust for 17.305MHz ±10Hz.
Connect a Freq. Counter to L65
VR21
Key Transmitter and adjust for 
17.305MHz ±10Hz.
Connect Voltmeter to IC7 Pin3
L21
Adjust for 
1.2VDC ±.1VDC.
Connect Voltmeter to J13
L17
Adjust for 
2.0VDC ±.1VDC.
Connect Oscilloscope to L65
L19
Adjust for Max.
Connect Freq. Counter to 
IC13 pin8
L23
Very carefully adjust for 
11.350MHz ±10Hz.
Connect Oscilloscope to 
IC17 pin13 
L24
L25
Very carefully adjust and for best waveform
AM TX OSC:
Same as above		 Connect a frequency counter to cathode of D45 
L27
Key transmitter and adjust for 
10.6950 MHz ±10Hz.
USB TX OSC:
Adjust VR7 fully clockwise. 
Put mode selector on USB. 		 Leave frequency counter connected to D45 
L29
Key transmitter and adjust for 
10.6925 MHz ±10Hz.
LSB TX OSC:
Put mode selector in LSB.
After adjustment return VR7 to approximate middle of rotation.		 Leave frequency counter connected to D45 
L28
 Key transmitter and adjust for 
10.6975 MHz ±10Hz.
Replace TP1, TP2, TP3 Jumper PCB.
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we cannot guarantee that the instructions will work on every radio presented.