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    • SSB High Speed Modem
      • Images
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    • 13cm PA
      • The Concept
      • Stage-1: 10W PA
      • Stage-2: 30W PA
      • Manufacturing Data
    • es'hail-2 Web SDR
      • Overview
      • Download
    • misc Circuits
      • RX Power/Refclk Box
    • Station Examples
      • DJ0ABR-1 until 7.2019
      • DJ0ABR-2 until 9-2019
      • DJ0ABR-3 since 10.2019
      • DO1RX
    WebWSPR
    • Overview
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    • Softw. Installation
    • Hardw.Installation
    • Operation
    • Soundcard
  • Antenna Switches and Selectors
    • Antenna Switch
    • Transceiver Selector Board
    • Video: Assembly
    • Ant.Switch PCB Data
    • TRX Sel. PCB Data
  • 2kW Low Pass Filter
    • Assembly Instructions
      • 160m
      • 80m
      • 60+40m
      • 30+20m
      • 17+15m
      • 12+10m
      • 6m
    • Schematics: Relais
    • Schematics: L/C
    • PCB placement
    • BOM
    • PCB pictures
    • measurement results
    • Schematics/Layout
  • Overcurrent Protection
    • Overview
    • Installation Manual
    • Schematics/Layout
  • 500kc 630m Band
    • 500W MOSFET Power Amp
    • Schematic/Layout
  • DDS and WSPR
    • U02-DDS & WSPR Beacon
    • DDS & WSPR board
    • 5watts 11-Band PA
    • Milliwatt Pwr/Swr Meter
    • TFT Color Display
    • the Software
    • DOWNLOAD
    • 5W PA Documents
  • WSPR-Linux Software
    • Overview
    • Ubuntu Installation
    • WSPR RX Console
    • WSPR RX X-Windows
    • Line-IN activation
    • Tips by users
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