Radio Shack TRC-501 owner manual Using Common 10-Codes, Code Meaning

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Using Common 10-Codes

Citizen’s band operators have largely adopted the 10-codes for standard questions and answers. These codes permit faster communication and better intelligibility in noisy ar- eas.

These tables list the codes adopted by the Associated Public Safety Communications Officers (APCO).

Code

Meaning

 

 

10-1

Cannot understand your

 

message.

 

 

10-2

Your signal is good.

 

 

10-3

Stop transmitting.

 

 

10-4

Message received and

 

understood.

 

 

10-5

Relay information to

 

________________.

 

 

10-6

I am busy or are you

 

busy?

 

 

10-7

Out of service.

 

 

10-8

In service.

 

 

10-9

Repeat last message.

 

 

10-10

Negative (No).

 

 

10-11

____________ in service.

 

 

10-12

Stand by.

 

 

10-13

Report ____________

 

conditions.

 

 

12

Code

Meaning

 

 

10-14

Information.

 

 

10-15

Message delivered.

 

 

10-16

Reply to message.

 

 

10-17

En route.

 

 

10-18

Urgent.

 

 

10-19

Contact ____________.

 

 

10-20

What is your location?

 

 

10-21

Call ___________ by tele-

 

phone.

 

 

10-22

Cancel last message.

 

 

10-23

Arrived at the scene.

 

 

10-24

Assignment complete.

 

 

10-26

Estimated time of arrival is

 

____________________.

 

 

10-30

Use caution.

 

 

10-31

Pick up.

 

 

10-33

Emergency traffic. Clear

 

the channel.

 

 

10-34

What time is it?

 

 

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Contents TRC-501 Introduction FCC Information Contents Installation Connecting the MicrophoneMounting the Microphone Holder MountingConnecting AN Antenna Selecting an AntennaConnecting AN Optional External Speaker Connecting the AntennaConnecting Power Using Vehicle Battery Power Using the CB as a Base StationReceiving Transmissions and Adjusting Squelch OperationTransmitting CB Operation TipsCommon Uses for a CB Radio CB Courtesy Maximum RangeUsing Common 10-Codes Code MeaningTroubleshooting Symptom Check ThatReducing Noise Maintenance Replacing the Fuse Specifications ReceiverFm Page 18 Thursday, August 5, 1999 1250 PM Fm Page 19 Thursday, August 5, 1999 1250 PM RadioShack Division of Tandy Corporation Fort Worth, Texas
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TRC-501 specifications

The Radio Shack TRC-501 is a classic handheld transceiver that epitomizes the innovation of the late 20th century in portable communication technology. Released during the peak of the CB radio craze in the 1970s, this device catered primarily to hobbyists and amateur radio operators, and it quickly won the hearts of many with its compact design and impressive features.

One of the main features of the TRC-501 is its ability to operate on the Citizens Band (CB) radio frequencies, which span from 26.965 MHz to 27.405 MHz. This range allowed users to communicate freely within a specified distance, making it suitable for personal use, small business operations, and even for truck drivers seeking to stay in touch while on the road. The unit supports 40 channels, providing ample options for users to find clear communication channels and avoid interference from other users.

The TRC-501 boasts a straightforward control layout, featuring a simple dial for channel selection and a push-to-talk (PTT) button positioned for easy access. The inclusion of an RF gain control helps users fine-tune their reception based on the signal strength, enhancing the overall clarity of conversations. Additionally, its built-in speaker ensures that audio is loud and clear, critical for effective communication in noisy environments.

In terms of technology, the TRC-501 operates using superheterodyne circuitry, a common method employed in radio communications that enables effective signal processing and minimizes noise. This technology helps the device maintain a reliable connection over various distances, making it versatile for different communication scenarios.

The TRC-501 is also designed for durability and portability. Its compact form factor, combined with a sturdy plastic casing, means it can withstand the rigors of everyday use. Users often appreciate its lightweight design, which allows for easy transport, whether in a vehicle or as part of outdoor activities.

Overall, the Radio Shack TRC-501 stands as a testament to the evolution of mobile communication technology during its time. Its combination of essential features, reliable performance, and user-friendly design has secured its place in the hearts of radio enthusiasts and collectors alike. The TRC-501 remains a symbol of a bygone era, reflecting the excitement of communication technology during the 1970s and the birth of more mobile forms of communication, paving the way for the advanced systems we have today.