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New 4 m, and 6 m, transceiver
Published on 29 April 2013 by OZ2M
Noble Radio NR-6N4 is a new 4 m and 6 m dual band radio. It covers 50.0 MHz to 52.0 MHz and 69.9 MHz to 70.5 MHz. Modulation is CW and SSB. Power is up to 20 W PEP. Price range is around 800 USD. The news release does not say anything about availability date.

The key, but preliminary technical specification, are listed below but are also subject to change:

  • Downconverting design
  • Dual Converesion: 1st IF: 10.7 MHz 2nd IF: 25 kHz
  • Sideband elimination using phasing techniques with digitally generated Quadrature carriers and Image
  • Reject mixers preceeded by 15 kHz crystal roofing filters
  • Ultimate receiver bandwidth set by adjustable SCAF filters (two 8th order filters used. One for High Cut and one for Low cut)
  • Sensitivity: MDS = -130 dBm
  • Dynamic Range Figures: blocking: 110 dB, IMD (3rd Order): 95 dB
  • Selectivity: 500 Hz to 4 kHz adjustable with the SCAF filters. Ultimate attenuation of filters are 55 dB or better
  • Power: 20 W PEP
  • SCAF Filters can be used to tailor SSB Transmit audio
  • Synthesizer: DDS/PLL synthesizer with 10 Hz minimum step size. Tuning rate is variable depending on the Tuning Knob speed (Variable Speed Tuning - VST)
  • The low level 10.7 MHz IF signal is also brought out to a rear connector so that it may be used for panadapter or SDR applications
  • Memories: 10 Memories per band
  • Supply voltage: 11.5 V to 14 V DC, approximately 3.6 A at full output power.
  • Dimensions: 203 mm (W) x 305 mm (D), including knob and heatsink, 95 mm (H), including feet
  • Weight: Approximately 1.8 kg