Davac5

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Davac 5 is new design of voice/SSB keyer for Tucnak. Although version 5 may appear to be a successor to version 4, is not true. It brings some advantages but also lacks some features.

To choose the version that best suits your requirements, please look at the table:

Davac versions comparsion
Davac 5 Davac 4
Size small bigger
Drivers required No Yes
Isolated No, use the USB isolator Yes
Band output No Yes
USB Micro-B A
Soundcard Is the soundcard itself Uses PC soundcard
Audio cables Shorter Longer
Modulation relay Solid SPST Mechanical SPDT

Photos

Recommended assembly is stencil, paste and reflow oven

Features

  • Simple assembly
  • All parts are SMD
  • Designed for SMD reflow
  • 3.5 jacks
  • 3D printed box
  • SMD LEDs + light guides on the top side
  • power supply from USB

Circuit diagram

Circuit diagram of Davac 5.0

Connecting to the radio

  • MOD - modulation output to the microphone input of radio
  • PTT - Push to talk output to switch Radio to the transmit (active low)
  • GND - One ground (ground plane on the bottom layer)