Realisitic TRC-476
Documentation Project

CBTricks.com

SPECIFICATIONS

General

Description

Transmitter

Crystal controlled PLL synthesizer, amplitude modulation

Receiver

Crystal controlled double conversion, superheterodyne system

Communicating frequencies

40 CB channels (26.965 to 27.405 MHz)

CB Weather radio frequencies

WX 1:162.400MHz WX 2:162.475MHz WX 3:162.550MHz

Voltage operation

12-16V DC (negative ground)

Temperature and Humidity range

-220F~+ 1400F (-300C ~ + 600C) and 10%~ 90%

Transmitter/Receiver switching

Electrical

 

Standard Test Conditions

Battery supply voltage

13.8V DC

Modulation

1000 Hz, 30%

CB Weather radio modulation

1 kHz, 3.3kHz Deviation

Receiver output power

500mW at external SP

Receiver output impedance

8 ohms, non-inductive

Ant. load impedance of transmitter

50 ohms, non-inductive

Ambient conditions

 

Temperature

630F730F (170C230C)

Humidity

40% - 70%

 

Transmitter

Description

Nominal

Limit

RF power output

4.0 watts

3.6-4.4 watts

Antenna spurious emission

- 70dB

- 50dB

Modulation capability (positive/negative)

+90%/-90%

+80%/-80%

AMC Range at 1 kHz

40 dB

30 dB

Frequency accuracy

0.002%

0.005%

Spurious radiation & Harmonic

 
 

Signal radiation ratio from fundamental

- 65dB

- 60dB

Current consumption

at no modulation

1000 mA

1200 mA

at 80% modulation

1500 mA

1700 mA

Envelope distortion

10% max. 1000 Hz, 50% mod.

Stability against variation of antenna impedance

Satisfactory when dummy antenna is varied from 40 ohms to 200 ohms.

 

Receiver

Description

Nominal

Limit

Intermediate frequency

 
 

1st IF

10.695 MHz

 

2nd IF

455 kHz

 

Sensitivity for 500 mW output

0.3uV

1uV

Sensitivity at 10dB (S+N)/N

0.7uV

1.0uV

Adjacent channel rejection

65dB

55dB

Image rejection (1st IF/2nd IF)

70dB

60dB

IF rejection ratio (1st IF/2nd IF)

60dB

45dB

Signal-to-Noise ratio

 
 

at 1mV input

40dB

35dB

Distortion at 1 mV input,

 
 

30% mod. (500 mW out)

3%

5%

AGC Figure of merit at 50mV input

80dB

70dB

Power output at 1 mV input

 
 

Undistorted (10% THD)

4.5W

4.0W

Maximum

5.0W

4.5W

Electrical fidelity compared to 1000 Hz

 
 

450 Hz

-6dB

-6 ±3dB

2500 Hz

-6dB

-6 ±3dB

Cross modulation

50dB

40dB

Squelch

60dB

60 ±6dB

Current consumption (no signal)

250 mA

300 mA

Signal meter sensitivity to light 3th LED

40dB

40 ± 6dB

Noise blanker

20dB

16dB

Automatic noise limiter

16dB

12dB

 

Weather Radio

Description

Nominal

Limit

20dB quieting

0.7uV

1.5uV

-3dB limiting

1uV

2uV

Frequency error

0

2 kHz

Distortion at 250KV input

3%

7%

Power output at 100uV input

 
 

Undistorted (10% THD)

4W

3W

Maximum

4.5W

4W

Public Items

Description

Nominal

Limit

10% THD output power

4W

3.5W

Microphone sensitivity for 4W

5mV

10mV

Current drain at 10% THD power

1000mA

1200mA


Fuse
WHT wire: 1 Amp.
RED wire: 2 Amp.

General power requirement

12~16VDC

Dimensions

(W)5/16" (150mm)   (H)1 14/16 (47mm)
(D)7 15/16" (202mm)

Weight

2 lbs. 4.5 oz. (1kg)


Note: Nominal specs represent the design specs; all units should be able to approximate these- some will exceed and some may drop slightly below these specs. Limit specs represent the absolute worst condition that still might be considered acceptable; in no case should a unit perform to less than any limit spec.


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Disclaimer: Although the greatest care has been taken while compiling these documents,

we cannot guarantee that the instructions will work on every radio presented.