Certified Pre-Loved FLEX-6400M radios are sold in excellent condition with a one year warranty. They have been through a full factory test and recalibration.

HF/50 MHz Direct Sampling Software Defined Radio Transceiver with high resolution display and ergonomic controls

The FLEX-6400M with Automatic Antenna Tuning offers the latest direct sampling SDR technology at an economical price for the general HF/6m operator yet they offer great performance for chasing DX and contesting.

The FLEX-6400M-ATU integrates all FLEX-6400 capabilities with a stunning 8-inch 1920 x 1200 IPS WUXGA touchscreen display and ergonomic controls to deliver a high performance SDR with a traditional radio interface. It delivers unmatched band awareness from an integrated display while providing an external connection for a HDMI compatible 1920 x 1200 resolution monitor for maximum spectral visibility. Influenced by top contest/DX operators, its symmetrical and independent dual VFO controls are strategically placed to provide maximum productivity for all types of operation. It’s completely self contained so just plug it in and operate — no PC, network or learning curve required.

With a PC, laptop, or Mac client you can utilize up to two 7 MHz spectrum/waterfall displays and independent receivers to revolutionize your view of the bands. Its two receivers can be placed simultaneously on any band and mode with instant QSY between VFOs. Digital mode operation is a dream with no sound cards, cables or boxes needed.

FlexRadio’s industry leading SmartSDR™ software offers compatibility across the entire FLEX-6000 Signature Series family to deliver continuous leveraged software enhancement. And you can use the latest SmartLink™ technology to access your radio virtually anywhere from any SmartSDR compatible client with only a login and password — even your iPhone.

  • 100W PEP HF-6m operation
  • All modes/all bands
  • Integrated Remote Operation with Maestro, PC/ Laptop, iPad® or iPhone®
  • 2 Independent Band / Mode Receivers
  • Full Duplex Cross-Band Operation
  • Transverter Port
  • Receive-Only Port
  • Direct Sampling SDR 122.88 Msps – 16 bit
  • 115 dB 2kHz RMDR
  • 10 MHz Reference Input with GPSDO option
  • Optional MARS/CAP/SHARES Expansion
  • Optional Antenna Tuner
All-in-One SDR includes all the features of the FLEX-6400 plus
  • Spectacular 8-Inch, 1920 X 1200 IPS Integrated Display
  • Touch Tune, Zoom, Pan Controls At Your Fingertips
  • Ergonomically Optimized Controls With Full Dual VFO
  • Up To 7MHz Spectrum / Waterfall Bandwidth
  • Real-Time Spectrum / Waterfall
  • >155 Db Dynamic Range
  • External Display Output – Full 1920 X 1200 Resolution
  • Internal Speaker

Specs

  • Weight: 272 oz
  • Width: 18 in
  • Depth: 19 in
  • Height: 12 in
Receiver
  • Independent Band/Mode Receivers (Max): 2
  • 1/2 kHz Reciprocal Mixing Dynamic Range (RMDR): 110/115 dB
  • ADC Bits/Sampling Rate: 16/122.88 Msps
  • Frequency Coverage: 30 kHz-54 MHz
  • Amateur Band Preselectors: 3rd Order
  • Cable-less Digital Audio (DAX/DAX IQ) Channels: 2/2
  • Receive Only Ports (Base/Including XVTR Port): 1/2
  • Full Duplex RX/TX Operation
 Spectrum/Waterfall
  • Internal Touch Panel Display Size Diagonal: 8-inch (6400M)
  • Integrated Display Resolution: 1920×1200 (6400M)
  • External Display Resolution/Connection: 1920×1200/HDMI (6400M)
  • Spectrum/Waterfall Displays (Max): 2
  • Spectrum/Waterfall BW (Min/Max): 5 kHz to 7MHz
  • Spectrum Dynamic Range (Max Zoom In): >145 dB
  • Spectrum Resolution Bandwidth (Min): 5.85 Hz/px
 Transmitter
  • 160m-6m Transmitter Output: 1-100W(25W AM)
  • Harmonic Suppression (Typ): < -60 dBc
  • Transverter Ports: 1
  • Transverter Frequency Coverage/Power: 100 kHz – 54 MHz/0 to +10 dBm
  • (OPTIONAL) Integrated Automatic Antenna Tuner Range: 3:1 SWR
  • Continuous MARS/CAP Coverage with Optional Filter
 General
  • Modes (Note 1) SSB, CW, AM, SAM, FM, FREE-DV, RTTY, DIGITAL
  • Integrated Remote Operation (SmartLink)
  • Maestro, PC, MAC, iPhone, & iPad Client Options
  • Internal Speaker/Power 2W Class D (6400M)
  • Frequency Stability (0C – 50C) 0.5ppm (TCXO)
  • GPS Disciplined Oscillator Optional 5 x 10-12 Over 24 Hours
  • External 10MHz Reference Input
  • Power Supply Requirements 13.8 VCDC +/- 15% (14 VDC Nom)
  • Dimensions 6.74″H (17.1 cm) x 14″W (35.6 cm) x 13.25″D (33.7 cm)

Simply Beautiful

  • No PC required to operate the FLEX-6400M*
  • 8 inch 1920 x 1200 IPS Display
  • Up to two independent receivers
  • Up to two 7MHz spectrum displays
  • Ergonomic workflow
  • Widely spaced / single function controls

Plug & Play Remote**

  • No complex setup required
  • Operate anywhere, any time
  • Use a Maestro, iPad, iPhone or Laptop
  • Across the country or across the world
  • Complete control

Anywhere, Anytime, From Any Of These Devices:

With SmartLink and a FLEX-6400/FLEX-6400M you can operate your radio from almost anywhere! Just take an iPhone, iPad, Laptop or Maestro with you and instantly connect to your radio with virtually no setup required.

Maximum Performance

  • SO2R in one radio
  • 116db RMDR
  • Continuous MARS/CAP TX Coverage
  • 0.02ppm OCXO
  • 8 digital audio streams and 4 IQ streams

Best in Class Performance

  • 115db RMDR
  • No noise fatigue
  • Ultra Low Phase Noise
  • Full Break-in QSK CW
  • Brick Wall Filters
  • Stunning transmit audio

Backed by an Amazing Suite of Software

*A PC may be required for use of 3rd party software such as loggers and digital modes programs. **SmartLink Remote Requires SmartSDR V2.x License. Requires internet connection. 1. RTTY and other digital modes use 3rd party software over DAX channels.

FlexRadio Systems does not charge your credit card until your order ships, but we do pre-authorize the the full purchase price at the time you place your on-line order. If you choose to use PayPal as your payment method, your account will be charged immediately.

Due to the price class of a FLEX-6000, your order may exceed your credit card’s daily transaction limit resulting in your order not being completed. In these cases, you may either contact your credit card company and negotiate a different daily purchase limit -OR- you can call FlexRadio Systems Sales department at 512-535-4713 ext 1 to place your order over the phone where we will not pre-authorize order payment until time of shipment.