Second hand FlexRadio Systems FLEX‑6700 SDR transceiver with ATU, boxed with power lead, front panel view.
Second hand FlexRadio Systems FLEX‑6700 SDR transceiver with ATU, boxed with power lead, front panel view.
Used FlexRadio FLEX‑6700 SDR transceiver in great condition, showing display and controls, ATU fitted
FlexRadio FLEX‑6700 SDR transceiver with ATU, second hand unit, angled view of chassis and connectors
Rear panel of second hand FlexRadio FLEX‑6700 SDR transceiver, showing antenna ports and I/O connections
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Second hand FlexRadio Systems FLEX‑6700 SDR transceiver with ATU, boxed with power lead, front panel view.
Used FlexRadio FLEX‑6700 SDR transceiver in great condition, showing display and controls, ATU fitted
FlexRadio FLEX‑6700 SDR transceiver with ATU, second hand unit, angled view of chassis and connectors
Rear panel of second hand FlexRadio FLEX‑6700 SDR transceiver, showing antenna ports and I/O connections

Second Hand Radio equipment

Second Hand FlexRadio Systems FLEX‑6700 SDR Transceiver (With Internal ATU)

£0.00
(£0.00 exc. VAT)
£3,495.00
(£3,495.00 exc. VAT)
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In great condition, boxed, includes power lead. SN/4213-3104-6700-28**
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Product code: FLEX6700‑SH‑SDR
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£3,495.00
12 Months 14.9% APR
£349.50
£301.18
£3,963.68
£3,495.00
18 Months 14.9% APR
£349.50
£200.79
£3,963.68
£3,495.00
24 Months 14.9% APR
£349.50
£150.59
£3,963.68
£3,495.00
36 Months 14.9% APR
£349.50
£100.39
£3,963.68
£3,495.00
48 Months 14.9% APR
£349.50
£75.30
£3,963.68
£3,495.00
12 Months 19.5% APR
£349.50
£313.24
£4,108.37
£3,495.00
18 Months 19.5% APR
£349.50
£208.83
£4,108.37
£3,495.00
24 Months 19.5% APR
£349.50
£156.62
£4,108.37
£3,495.00
36 Months 19.5% APR
£349.50
£104.41
£4,108.37
£3,495.00
48 Months 19.5% APR
£349.50
£78.31
£4,108.37

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Second hand FlexRadio Systems FLEX‑6700 SDR transceiver with ATU, boxed with power lead, front panel view.

Second Hand FlexRadio Systems FLEX‑6700 SDR Transceiver (With Internal ATU)


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Second Hand FlexRadio Systems FLEX-6700 SDR Transceiver - SN/4213-3104-6700-28**

The FlexRadio Systems FLEX-6700 is a high-performance SDR transceiver from the Signature Series, designed for serious amateur radio operators who want cutting-edge direct sampling technology, powerful DSP, and flexible multi-slice operation. This second-hand unit delivers exceptional receive performance, network-ready operation and seamless integration with SmartSDR software.

At the heart of the FLEX-6700 are two independent, synchronous Analog Devices AD9467 16-bit 245.76 Msps ADCs, allowing direct digitisation of the RF spectrum. The receiver supports up to 8 independent Slice Receivers, covering 0.03–77 MHz and 135–165 MHz, each with its own spectral display of up to 384 kHz. With massive built-in DSP power (up to 317 GMACS and 121 GFLOPS), the FLEX-6700 delivers outstanding filtering, noise reduction and signal handling.

The Flex-6000 Signature Series is designed for plug-and-play operation: simply connect antenna, power and network, install SmartSDR on your PC, and you are on the air. The series is also the first amateur radio family to offer an optional GPS Disciplined Oscillator (GPSDO) for enhanced frequency stability.

This second-hand FLEX-6700 has been checked and tested, and is ideal for contesting, DXing and advanced remote/networked operation where top-tier SDR performance is required.

Key Features

  • Second-hand FlexRadio Systems FLEX-6700 SDR transceiver
  • Direct digital sampling architecture with dual 16-bit 245.76 Msps ADCs
  • Up to 8 independent Slice Receivers
  • Wideband coverage from 0.03–77 MHz and 135–165 MHz
  • SmartSDR software for advanced control and signal processing
  • Plug-and-play installation via standard network connection
  • High DSP performance: 317 GMACS and 121 GFLOPS
  • Optional GPS Disciplined Oscillator (GPSDO) support

Technical Specifications

General
Receiver
DSP & Processing
ModelFlexRadio Systems FLEX-6700 (Signature Series)
ModesUSB, LSB, CW, RTTY, AM, FM
USB Ports2 × USB 2.0
Antenna Connectors2 × BNC
Antenna Impedance50 Ω unbalanced (without tuner)
Power Requirements100–240 V AC, 47–63 Hz, approx. 20 W (radio only)
Dimensions (W × D × H)Approx. 330 × 305 × 102 mm
WeightApprox. 5 kg
Wideband Frequency Coverage0.03–77 MHz, 135–165 MHz
Amateur Band Preselector Coverage160–6 m (except 60 m)
Slice ReceiversUp to 8 independent Slice Receivers
Per-Slice Display BandwidthUp to 384 kHz spectral display
ADC2 × AD9467, 16-bit, 245.76 Msps
DSP Performance317 GMACS, 121 GFLOPS
SoftwareSmartSDR for Windows (and compatible clients)
Optional FeaturesGPS Disciplined Oscillator (GPSDO)

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