Transmitter

 

 

 

 

Power output

High

 

60 W

 

 

 

Low

 

Approx. 25 W

 

 

 

 

 

 

Modulation

 

Reactance

 

 

 

 

Spurious emissions

 

Ð60 dB or less

 

 

 

 

Maximum frequency deviation

 

Wide: ±5 kHz

 

Narrow: ±2.5 kHz

 

 

 

 

 

 

 

Audio distortion (at 60% modulation)

 

3% or less

 

 

 

 

Microphone impedance

 

600

 

 

 

 

 

 

 

 

 

 

Receiver

 

 

 

Circuitry

 

Double conversion superheterodyne

 

 

 

Intermediate frequency (1st/ 2nd)

 

49.95 MHz/ 450 kHz

 

 

 

Sensitivity (12 dB SINAD)

 

Wide: 0.18 V or less

 

 

 

Narrow: 0.22 V or less

 

 

 

Selectivity (Ð6 dB)

 

Wide: 12 kHz or more

 

 

 

Narrow: 10 kHz or more

 

 

 

Selectivity (Ð60 dB)

 

Wide: 30 kHz or less

 

 

 

Narrow: 24 kHz or less

 

 

 

Squelch sensitivity

 

0.1 V or less

 

 

 

Audio output (8 ohms, 5% distortion)

 

2 W or higher

 

 

 

Audio output impedance

 

8

 

 

 

 

72

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Image 79
Kenwood TM-271A, TM-271E instruction manual Transmitter, Narrow 0.22 ∝V or less

TM-271A, TM-271E specifications

The Kenwood TM-271A and TM-271E are robust dual-band transceivers designed for amateur radio enthusiasts looking for reliability, functionality, and ease of use. Both models operate in the VHF and UHF bands, specifically covering 144-148 MHz and 430-450 MHz, respectively. This versatility allows users to communicate across varied frequencies, making them suitable for a wide range of applications, from casual conversations to emergency communications.

One of the standout features of the TM-271A and TM-271E is their compact size, making them an ideal choice for mobile operations. Despite their small footprint, these radios pack a punch with a maximum transmit power of 50 watts in the VHF band and 35 watts in the UHF band. This power output ensures clear and effective communication over long distances, essential for outdoor activities and emergency situations.

The user-friendly interface of the TM-271 models includes a large, backlit LCD display, which provides clear visibility in various lighting conditions. The controls are intuitively arranged, allowing users to navigate functions with ease. Moreover, both models come equipped with an alphanumeric memory, allowing for the storage of up to 200 memories for easy access to frequently used frequencies.

Advanced features such as a built-in CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digital Coded Squelch) enhance communication clarity by minimizing unwanted noise and ensuring that only desired signals are received. The TM-271A and TM-271E also support a wide range of modulation modes, including FM, allowing versatility in communication styles.

In terms of durability and build quality, the Kenwood TM-271 series excels with a rugged design that withstands the rigors of mobile use. The units are also equipped with a front-facing speaker that delivers excellent audio quality, ensuring clear communications even in noisy environments.

Another notable feature is the wideband reception capability, allowing users to listen to signals outside of the amateur bands, making these transceivers more versatile for everyday monitoring of public safety channels and other broadcasts. Furthermore, the inclusion of a built-in diagnostic function aids users in troubleshooting, ensuring that the radio remains in optimal working condition.

In conclusion, the Kenwood TM-271A and TM-271E are outstanding choices for amateur radio operators seeking a powerful, feature-rich, and user-friendly dual-band transceiver. Their combination of advanced technology, compact design, and rugged reliability makes them a popular choice among both novice and experienced operators in the radio community.