Note
The IC-271(A)(H) is a compact and lightweight transceiver suitable for fixed, mobile, and portable operations. It utilizes a CPU-controlled system with a no-backlash tuning dial and a large, easy-to-read vacuum florescent display. The unit is designed for versatility, supporting DX, local calls, and satellite work. It can be powered by either a 12V DC source or an optional internal/external AC power supply.
The IC-271(A)(H) sits as a mid-1980s "Second Generation" all-mode VHF base station. It was the bridge between the early analog-heavy designs of the 1970s and the more advanced digital rigs of the late 1980s.
It replaced the IC-251A, and was replaced by IC-275A. A UHF version, the IC-471A, was also produced.
Features
– Advanced Control: Features CPU control with ICOM's original programs and a unique rotary encoder circuit for smooth tuning.
– Memory and VFO: Equipped with 32 memory channels that store frequency, mode, and duplex settings. It also features dual VFOs for independent or split frequency operation.
– Scanning Capabilities: Includes multi-purpose scanning options such as Memory Scan (mode-selective) and Program Scan between two frequencies.
– Continuous Tuning: A 7-digit luminescent display provides accurate 100Hz readout, following the movement of the 50mm-diameter tuning knob.
– Performance Tools: Built-in effective Noise Blanker for pulse noise reduction and an RF amplifier/first mixer circuit using FETs for excellent selectivity and cross-modulation characteristics.
– Operational Ease: Includes a Dial Lock switch for mobile use and a powerful 2.0-watt audio output for clear listening in noisy environments.
Specifications
– Frequency Coverage: 143.8 ~ 148.2 MHz
– Operating Modes: SSB (USB/LSB), CW, FM
– RF Output Power:
(271A) 25 Watts (Continuously adjustable from 1 Watt to Max)
(271H) 100 Watts (Continuously adjustable from 10 Watt to Max)
– Frequency Stability: Within ±1.5KHz (−10∘C to +60∘C)
– Sensitivity (SSB/CW): Less than 0.5 microvolts for 10dB S+N/N
– Sensitivity (FM): Less than 0.3 microvolts for 12dB SINAD
– Antenna Impedance: 50 ohms Unbalanced
Power Requirements: 13.8V DC ±15% (Negative ground); Max current 6.0A
Current drain:
IC-271A: (Tx): 6.0 amps, (Rx) 1.4 amps (max audio)
IC-271H: (Tx): 18.0 amps, (Rx) 1.4 amps (max audio)
