DX-R8 | Alinco

Alinco » DX-R8

Double-conversion HF desktop receiver. Analogical configuration, all mode, 0.04-35 MHz coverage. Detachable front-control panel. I/Q signal output allows use of SDR software. Ideated in Japan, year of introduction 2010.

Reference market : ham-radio

General :
Frequency coverage [1] 0.0400 ~ 34.9999 MHz
0.0400 ~ 29.9999 MHz [2]
Modulation mode CW / LSB / USB / AM / FM
Receiver :
Sensitivity SSB / CW 1.0 uV (0.15~1.8 MHz, 10dB S/N)
0.25 uV (1.8~30 MHz, 10dB S/N)
AM 10 uV (0.15~1.8 MHz, 10dB S/N)
2.0 uV (1.8~30 MHz, 10dB S/N)
FM 0.5 uV (28~30 MHz, 12dB SINAD)
Selectivity SSB / CW 2.4 KHz (-6dB)
4.7 KHz (-60dB)
AM-N 2.4 KHz (-6dB)
4.7 KHz (-60dB)
AM / FM 6 KHz (-6dB)
18 KHz (-60dB)
Image rejection > 70dB
IF-shift range ± 1.2 KHz
Frequency stability ± 1ppm max from -10°C to +60°C
Intermediate frequency 71.75 MHz
455.0 KHz
Features :
Memory 600 regular memories (200 x 3 banks)
4 for programmed scan limits
2 VFO
Display 10 Hz frequency resolution
26-segments signal meter bar
Antenna SO239 50Ω connector
Power supply 11.7 ~ 15.8 VDC external, 13.8V nominal
Power consumption 1000 mA
700 mA squelch on
Audio power 2 W with an 8Ω load
Audio output Jack 6.35 mm headphone
I/Q out 20 KHz bandwidth
Mechanical and environmental data :
Operating temperature from -10°C to +60°C
Dimensions 240 (W) x 94 (H) x 255 (D) mm
Weight 4.1kg

[1] Specifications valid in 0.15 ~ 30 MHz range
[2] DX-R8T for USA/Canada

Description :

The DX-R8 brings the presence of Alinco in the HF sector with a receiver of interesting features. The front panel design outlines an appreciable ease of use in relation to the many control functions. Furthermore, the same panel is separable (the optional EDS-17 kit includes cables and small mechanical parts) allowing the displacement up to 5 meters away from the body of the apparatus. The mobile use is therefore facilitated. Another element to underline is the availability of the tuned signal as output in I / Q analog format (in-phase and quadrature) with ±20 KHz bandwidth, This allows to acquire the two components through the normal audio connections of a PC in order to process, demodulate and record transmissions as an SDR.

The receiver adopts a double conversion configuration. All the main parameters are displayed on the large LCD display that dominates the front panel. All modes, IF-shift to move the filter band-pass with respect to the tuned frequency, RIT, AM selectable IF bandwidth, audio filter (500 Hz wide) for CW, RF preamplifiers, RF attenuator, noise-blanker, squelch, shutdown timer. Tuning can be set by rotary control, with direct input from the keyboard, from PC. Segment-bar signal meter (S-meter) with a resolution that allows to measure variations of 3dB in the intensity up to S9. Scan modes: memory, Frequency limits. 600 memories are available in three separate banks.

Performance and practical notes :

The receiver can nominally tune down from just 40 KHz. Up to 150 KHz, however, the sensitivity is very low and not guaranteed by specifications. Pay attention to this aspect if you want to use the receiver in VLF band. Excellent audio performance also guaranteed by the favorable position of the speaker even if of modest size, a qualitative aspect for the ratings in AM broadcasting listening. Availability of the signal in I / Q format: this is an option that adds considerable flexibility to the DX-R8, which in this way is not limited by the internal demodulation functions. In this choice the Alinco has met an effective need for advanced enthusiasts.

Valuation :

Sensitivity
Selectivity
Dynamic range
Spurious response
Audio
Signal functions
Control functions
User friendly

Stars: 1=insufficient, 2=just sufficient, 3=mediocre, 4=good, 5=excellent

Review :

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