I started my journey into QO-100 with a very simple setup. Details can be found here. The previous setup consists of the well known LimeSDR-mini, a pre-amp and a modified WiFi-amp. No I placed all the components into an old case - not so fancy but sturdy.

 

IMG 668! 

The frontpanel contains three toggle-switches to control the various components:

  1. 28VDC to the final power amplifier
  2. 12VDC to the LNB via the bias-T
  3. 5VDC to the LNA in front of the final power amplifier

And a "huge" LCD display for some status information

  • Device input voltage
  • Final power amplifier current draw
  • Final power amplifier supply voltage
  • Final power amplifier heatsink temperature
  • Internal 5VDC rail

 The toggle-switch right to the display switches the layout of the LCD display.

Piggy-back on the HELTEC module is a simple break out board for the ADS1115 ADC.

The source-code can be found here.

 IMG 668!  

The main components are (clockwise from right top):

 

IMG 668!

 IMG 668!

IMG 668!

IMG 668!

From left to right:

  • USB3 connector to the LimeSDR-mini
  • 13VDC powerpole connector
  • F-socket to the LNB / RX antenna
  • SMA-socket to the TX antenna

 

2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.

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