Cherokee
Radios CBS2100
Documentation Project
CBTricks.com
SUMMARY OF ALIGNMENT POINTS FOR CBS-2100 RADIO
(Refer to Alignment Procedure Section for Details)
Item |
Description (Test on Ch20 - Center Freq) |
Test Point |
Adj. Point |
1 |
AM Rx Signal Level Meter |
Signal Meter on Front Panel |
VR01 |
2 |
SSB Rx Signal Level Meter |
Signal Meter on Front Panel |
VR02 |
3 |
SSB Squelch Level - Preset Level |
Ext Speaker Output |
VR03 |
4 |
AM Squelch Level - Preset Level |
Ext Speaker Output |
VR04 |
5 |
SSB Balance Modulator Output – Null |
Ant RF Output - Power Meter |
VR07 |
1 |
Tx Power Level Meter |
Signal Meter on Front Panel |
VR08 |
2 |
SSB RF Power Output TR43 Quiescent Current - 100mA |
TP7/TP9 |
VR10 |
3 |
SSB RF Power Driver TR44 Quiescent Current - 50mA |
TP8/TP9 |
VR11 |
4 |
SSB TX Power Limiting |
Ant RF Output - Power Meter |
VR12 |
5 |
AM Power Output - Full Power |
Ant RF Output - Power Meter |
VRI3 |
6 |
Modulation Level Limiter -AM Full Power |
Ant RF Output – Oscilloscope |
VR14 |
7 |
Balance TX and RX frequency on 1st offset Freq Gen |
R74 (TP3) - Clarifier at mid position |
VR15 |
8 |
Noise Blanker Adjustment (With Noise Generator) |
Ext Speaker Output |
L01-L02 |
9 |
AM Receiver Adjustment (IF) |
Ext Speaker Output |
L03-04 |
10 |
AM Receiver Adjustment (Front End) |
Ext Speaker Output |
L06-08 |
11 |
AM Receiver Adjustment (Mixer) |
Ext Speaker output |
L10-12 |
12 |
SSB IF Adjustment |
Ext Speaker Output |
L13-14 |
13 |
PLL VCO Voltage |
R116 (TP2) |
L17 |
14 |
AM 1st Offset Frequency Generator |
R74 (TP3) - Clarifier at mid position |
L19 |
15 |
USB 1st Offset Frequency Generator |
R74 (TP3) - Clarifier at mid position |
L20 |
16 |
LSB 1st Offset Frequency Generator |
R74 (TP3) - Clarifier at mid position |
L21 |
17 |
AM 2nd Offset Frequency Generator |
TR46 Collector (R223) |
L26 |
18 |
USB 2nd Offset Frequency Generator |
TR46 Collector (R223) |
L27 |
19 |
LSB 2nd Offset Frequency Generator |
TR46 Collector (R223) |
L28 |
20 |
RF Output at acceptable level across the band |
Ant RF Output - Power Meter |
L40/L42/L33 |