Realistic TRC453
Documentation Project
CBTricks.com
TX Alignment Procedure:
Refer to ALIGNMENT POINTS
Equipment Required

a. AF Oscillator (two required)
b. AF SSVM (Full scale: 1 V DC with RF probe)
c. DC Ammeter
d. RF Power Meter
e. 50 ohm load and Attenuator		 f. Oscilloscope
g. RF SSVM
h. Monitor Receiver or Spectrum Analyzer
i. DC Power Supply (13.8 V/3 Amp.)

STEP

SETTINGS

CONNECTION
ADJUST

ADJUST FOR

1.

CH: 19, PA/CB: CB
USB mode, TX
S1 and S2: OFF

Break circuit at TP8 and TP7, place DC mA meter in series.

VR9

Adjust for 40 mA.

2.

Same as step 1

 Break circuit at TP8 and TP6, place DC mA meter in series.

VR8

Adjust for 30mA

After step 1 and 2, restore circuit at TP8 and TP7.

3.

Same as step 1
OSC1: 500 Hz
OSC2: 2400 Hz
S1, S2: ON

 Set VR6 to Full clockwise rotation ALC "off" condition). Keep the AF ATT for approx. 20V reading on RF SSVM.

L37, 36,
35, 34
and 26

Then adjust coils for max. reading. Repeat this adjustment several times, reducing the AF input level to the microphone circuit.

4.

Same as step 3

  

L34, 35
and 36

Adjust Coils for max, reading on RFSSVM. Check the power difference between CH1 and CH40, If it is over 1V on RFSSVM, readjust coils to obtain within 1 V.

5.

Same as step 1
AM mode
OSC1 : 1 kHz
S1 : ON, S2: OFF

Adjust level of OSC1 for 5mV reading on AF SSVM,

L26

Adjust for maximum reading on RFSSVM.

6.

Same as step 1
S1, S2: OFF

 Spectrum Analyzer or Oscilloscope.

VR4

Adjust for minimum carrier leakage for both USB and LSB

7.

Same as step 3
OSC1 : 500 Hz
S1, S2: ON

 Adjust OSC1 and OSC2 for 5mV reading on AF SSVM,

VR6

Adjust for 24.5V reading on RF SSVM.

8.

Same as step 1
AM mode
S1, S2: OFF

RF Power meter.

VR10

Adjust for 4.0W reading on RF Power meter.

9.

Same as step 8

 RF Power meter.

VR7

Adjust so the 4 digits light on the Transceiver's meter.

10.

Same as step 5

 Adjust output of OSC1 for 200mV reading on AF SSVM

VR5

Adjust for 95 to 98% modulation on Scope.
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we cannot guarantee that the instructions will work on every radio presented.