FLEX-6400 SDR Transceiver

The FLEX-6400 model is designed for the Ham who wants to operate the radio exclusively as a server from PC, laptop, Maestro, Mac*, or iOS clients — whether local or remote. Both models share the same game-changing band awareness, industry-leading phase noise performance, brick wall filters, and legendary audio performance to deliver you the most fun across a wide variety of operating styles.

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.

FLEX-6400 Features

• 100W PEP HF-6m operation
• All modes/all bands
• Integrated Remote Operation with Maestro, PC/ Laptop, Mac, iPad^® or iPhone^®
• 2 Independent Band / Mode Receivers
• Full Duplex Cross-Band Operation
• Receive-Only Port
• Transverter Port
• Direct Sampling SDR 122.88 Msps – 16 bit
• 115 dB 2kHz RMDR
• >155 dB Dynamic Range
• Optional Antenna Tuner
• 10 MHz Reference Input
• Optional GPSDO Option for ultra high frequency precision and accuracy
• Optional MARS/CAP/SHARES TX Expansion Module

Plug & Play Remote (1)

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

Anywhere, Anytime, From Any Of These Devices

With SmartLink and a FLEX-6400 you can operate your radio from almost anywhere! Just take an iPhone, iPad, Laptop, or Maestro with you and instantly connect to your radio using an Internet connection.

Best in Class Performance

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

Backed by an Amazing Suite of Software

• SmartSDR for Windows
• SmartSDR for Mac (2)
• SmartSDR for iOS (2)
• SmartSDR CAT
• DAX

1 – SmartLink Remote Requires SmartSDR V2.x License or Later. Requires an Internet connection.
2 – SmartSDR for Mac and SmartSDR for iOS are optional, 3rd party software for pay options.

FLEX-6400 Specifications

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

 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 Automatic Antenna Tuner Range: 3:1 SWR
• Optional Continuous MARS/CAP Coverage with Extended Transmit Filter

 General

• Modes¹ SSB, CW, AM, SAM, FM, RTTY, DIGITAL
• Integrated Remote Operation (SmartLink)
• Maestro, PC, Mac, iPhone, & iPad Client Options
• Frequency Stability (0C – 50C): 0.5ppm (TCXO)
• Optional GPS Disciplined Oscillator Optional 5 x 10-12 Over 24 Hours
• External 10MHz Reference Input
• Power Supply Requirements 13.8 VCDC +/- 15% (14 VDC Nominal)
• Dimensions 6.74″H (17.1 cm) x 14″W (35.6 cm) x 13.25″D (33.7 cm)

1. RTTY and other digital modes use 3rd party software over DAX channels

FLEX-6400 Whats in the Box

• FLEX-6400
• FHM-3 Hand Mic
• DC Power Cable
• Ethernet Cable
• Quick Start Guide

Want to know even more?

• Quick Start Guide
• User Guide
• Reference Manual
• SmartSDR Software User Guide v3.x
• Brochure

Preliminary information. Some features subject to change without notice. Some features may be in future firmware releases.