The Tone Set Menu lets you set features that relate to sound and the CTCSS tones. To access these settings, turn on the HTX-400 then hold down FUNC and press T.SET. (The tone option ap- pears.) Press FUNC + V or W to select the option, then V or W to change the setting.

Tone Set

Setting

 

 

Option

( ) = default setting

Description

Page

 

 

 

 

 

 

 

 

tone

(Off)

Lets the HTX-400

35

Subaudible

On

transmit and

 

Tone

 

receive the Sub-

 

 

 

audible Tone

 

 

 

(CTCSS) fre-

 

 

 

quencies so you

 

 

 

can listen only to

 

 

 

other units with

 

 

 

the same tone.

 

 

 

 

 

rC

See the table

Lets you select

35

Receive

on Page 36.

one of 47 different

 

Tone

(67.0)

receiving sub-

 

 

 

audible tones or

 

 

 

turn the feature

 

 

 

off.

 

 

 

 

 

tC

See the table

Lets you select

35

Transmit

on Page 36.

one of 47

 

(67.0)

different subaudi-

 

Tone

 

ble tones or turn

 

 

 

the feature off.

 

 

 

 

 

MEL

(1), 2, 3, 4, 5

Lets you select a

37

Tone Paging

 

tone to receive or

 

 

 

transmit.

 

 

 

 

 

18

Page 18
Image 18
Radio Shack HTX-400 owner manual Tone Set Setting Option = default setting Description

HTX-400 specifications

The Radio Shack HTX-400, introduced in the mid-1990s, remains a beloved model among amateur radio enthusiasts and collectors. Known for its reliability and versatility, this transceiver is particularly notable for its compact design and user-friendly interface. The HTX-400 operates on both VHF and UHF frequencies, enabling users to communicate effectively across various channels.

One of the HTX-400’s key features is its output power, which is adjustable between 1 and 40 watts. This flexibility allows operators to choose their transmitting power based on the communication needs and conditions of their environment. The device operates on the 2-meter band, covering the frequency range of approximately 144 to 148 MHz, making it ideal for local communications as well as a part of emergency communication networks.

A significant technological aspect of the HTX-400 is its digital display, which provides clear readings of frequency and signal strength. Users appreciate the intuitive control layout, which allows for quick adjustments and easy channel changes. The built-in memory function can store multiple frequencies, providing users with the ability to switch quickly between channels they use frequently.

Another standout feature is its CTCSS tone encoding and decoding capability. This allows operators to filter incoming signals and communicate within designated groups without interference from other conversations on the same frequency. This capability enhances clarity and reduces noise, making it an excellent choice for repeaters.

The HTX-400 also includes an Automatic Gain Control (AGC) feature, which adjusts the receiver automatically to varying signal strengths, ensuring consistent audio quality even in weak signal conditions.

Portability is a major consideration for amateur radio operators, and the compact size of the HTX-400 makes it easy to transport. It operates effectively with various power sources, including a standard AC power supply and battery, making it a suitable option for both home use and portable operations.

In conclusion, the Radio Shack HTX-400 is a versatile and reliable transceiver that features adjustable power output, user-friendly controls, memory functions, CTCSS tone capabilities, and excellent portability. Its combination of advanced technologies and practical design has made it a favorite among radio enthusiasts for decades.