Dual-Band Mobile Transceiver with Full Duplex Capability

The new DR-638 dual-band transceiver from Alinco makes a sharp attractive addition to any operating environment. Starting with full duplex capability, cross-band repeat and a remotely mountable control head, the DR-638 is a solid performer for base or mobile operation. With a highly visible large, 6 character alphanumeric display features variable display colors for custom illumination. Ignition key on/off feature, theft alarm, extended receive capabilities, a variety of signaling and scan modes are also included at no extra cost! It is programmed by computer by using the ERW-12 cable.

The backlit, DTMF microphone EMS-77 allows remote control of the transceiver. Put the DR-638 with its good looks and smart operating features to work right away in your base station or vehicle as a reliable and easy-to-use, high-quality VHF/UHF transceiver that is perfect for simplex and repeater operations!

ALINCO DR-638 Features

  • VHF/UHF full duplex operation includes V/U and U/V modes.
  • 758 channels programmable
  • H/M/L power output settings - VHF:50W/25W/10W/5W, UHF:40W/25W/10W/5W
  • Large 6 character alphanumeric backbit display
  • Inversion scrambling
  • Internal duplexer – single antenna connector
  • Removable control head can be remotely mounted or inverted for optimal speaker placement
  • Expanded receive range includes AM civil aviation band
  • Cross-band repeater
  • Variable Display color tone
  • Illuminated DTMF EMS-77 microphone allows direct VFO frequency entry and remote control of transceiver
  • CTCSS, DCS, Tone-Burst Tones,2-tone and 5-tone signaling
  • CTCSS Tone and DCS scan
  • Variety of scan modes and priority channel monitoring
  • TOT, BCLO, Talk Around, Reverse and ANI
  • Utility software and cable cloning
  • Ignition key activated power on/off feature



Frequency range TX : 136~174MHz/400~480MHz
RX : 108~180MHz(AM/FM)/220~260MHz,
400~523MHz, 350~399.995MHz(FM)
Channel steps 25KHz (Wide mode)
20KHz (Middle mode)
12.5KHz (Narrow mode)
Channel spacing 2.5KHz,5KHz, 6.25KHz, 8.33KHz, 10KHz,
12.5KHz, 15KHz, 20KHz, 25KHz, 30KHz, 50KHz
Memory channel 758 Channels
Antenna impedance 50 ohm unbalanced
Frequency stability +/- 2.5ppm TCXO
Microphone impedance 2K ohm
Squelch Carrier/CTCSS/DCS/5Tone/2Tone/DTMF
Power supply requirement 13.8 VDC +/- 15% (11.7-15.8V)
Current drain Approx. 11A TX high / 700mA RX max. / 500mA RX squelched
Usable temperature range 14°F ~ 140°F (-26°C ~ +60°C)
Dimensions (w/o projection) 5.47×1.58×8.35 in approx.
139×40×212 mm
Weight Approx. 1.14Kg (40.21oz)
  WIDE mode NARROW mode
Output power VHF - 50W/25W/10W/5W
UHF - 40W/25W/10W/5W
Modulation 16KΦF3E 11KΦF3E
Adjacent Channel Power ≥70dB ≥60dB
Hum & Noise ≥40dB ≥36dB
Spurious Emission ≥60dB ≥60dB
Audio Response +1~-3dB(0.3~3KHz) +1~-3dB(0.3~2.55KHz)
Audio Distortion ≤5%
  WIDE mode NARROW mode
Sensitivity (12dB Sinad) ≤0.25μV ≤0.35μV
Adjacent Channel Selectivity ≥70dB ≥60dB
Intermodulation ≥65dB ≥60dB
Spurious Rejection ≥70dB ≥70dB
Audio Response +1~-3dB(0.3~3KHz) +1~-3dB(0.3~2.55KHz)
Hum & Noise ≥45dB ≥40dB
Audio distortion ≤5%
Audio power output 2W@10%





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