QO-100 - 2021 base-station

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.

	The frontpanel contains three toggle-switches to control the various components: 28VDC to the final power amplifier 12VDC to the LNB via the bias-T 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.
	The main components are (clockwise from right top): Heatsink with LNA attached on top Final power amplifier frm SG-Labs Homemade Bias-T for the LNB connection 13VDC Powerpole input LimeSDR-mini with small fan inside a 3D-printend enclosure DC current sensor for 12VDC rail ESP32 based microcontroller with LCD and 4 channel ADC DC power distribution PCB with cage clamps fuse block for 5VDC, 12VDC and 28VDC DC/DC converter from 13VDC to 5VDC for LNA and microcontroller (eBay) DC/DC converter from 13VDC to 28VDC for the final PA (eBay)

	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

2022-07-10

In the mean time I've placed a small 5V DC fan in the side panel next to to PA heat sink. The fan is temperature controlled by the EPS32 board and effectivly removes the heat from the PA sink.

Satellite 16. Juni 2022