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KN-Q7A Single Band SSB Transceiver | Radioaficion Ham Radio

KN-Q7A Single Band SSB Transceiver


KN-Q7A  Single Band SSB TransceiverKN-Q7A Single Band SSB Transceiver Kit

The kit was designed specifically for the worldwide market by BA6BF, and kitted and supplied by BD6CR/4. As the upgraded version of the popular KN-Q7 (more than 500 kits were sold worldwide), the KN-Q7A has an improved circuit design and component selection, which makes it an ideal candidate for field operation, back pack and emergency use.


Main Improvements from KN-Q7

  • Improved Low Pass Filter (LPF) circuit to meet the -43 dBc standard
  • Added post IF amplifier one pole crystal filter to reduce background noise
  • Removed RX/ TX indicator LED to further reduce RX current consumption by about 5 mA
  • (from 35 mA to 30 mA)
  • Added an on-board RF attenuator in the receiver front end to eliminate broadcast
  • interference
  • Added power polarity protection
  • Larger chassis area (+25%) used as heat sink to reduce thermal drift
  • More frequency coverage options: support for European calling frequency 7.090 MHz and American calling frequency 7.285 MHz
  • Matched IF filter crystals to ensure good selectivity
  • Improved part selection, and reduction of SMD part count to just one transistor


  • Dimension: 153 mm x 97 mm x 40 mm, not including protruding features
  • Weight: 500 g or 1.1 lbs
  • Power Supply: 12~13.8 V, 3 A
  • Current consumption: 30 mA in RX and about 2 A in TX @ 13.8 V
  • RF output: about 10 W PEP @ 13.8 V
  • Spur suppression: better than -43 dBc
  • Sensitivity: better than 0.5 μV at 10 dB SNR
  • IF filter: 6 pole crystal ladder filter + 1 pole post IF amplifier crystal filter
  • IF bandwidth: about 2.0 kHz
  • IF frequency: 8.467 MHz or 8.192 MHz, depending on the selected tuning range
  • Frequency tuning range: about 20 kHz in VXO type. Five options: 7.050~7.070 MHz, 7.080~7.100 MHz, 7.145~7.165 MHz, 7.200~7.220 MHz, or 7.280~7.300 MHz
  • Connectors:
  • Speaker output: 3.5 mm connector, mono output
  • Microphone input: 8-pin, can be configured to be compatible with electret microphones
  • Antenna connector: SL-16 type (M or SO-239 type equivalent), rear panel mount
  • Controls:
  • IF Gain Control: act as volume control
  • Tune Control
  • On board RF Attenuator trimmer to eliminate broadcast interference


KN-Q7A Single Band SSB Transceiver Kit Manual in English

KN-Q7A Kit Part List

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