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--- member-projects:g4klx-qo100 [2023/10/06 17:14] – g4klx
+++ member-projects:g4klx-qo100 [2025/03/26 17:40] (current) – g4klx
@@ Line 1: / Line 1: @@
 ====== G4KLX' QO-100 setup ======
-My QO-100 system started life in 2019 not longer after QO-100 was launched, and during that year the system was built. My first QSO via the satellite taking place in the summer of that year. The system has been designed to be portable around the house since the best location for the dish has never been near to where the shack is located. Therefore the need for operation from 12V has not been an issue, being relatively physically portable, and with fast setup times has.
+My QO-100 system started life in 2019 not long after QO-100 was launched, and during that year the system was built. My first QSO via the satellite taking place in the summer of that year. The system has been designed to be portable around the house since the best location for the dish has never been near to where the shack is located. Therefore the need for operation from 12V has not been an issue, being relatively physically portable, and with fast setup times has.
 The core of the system has remained pretty static since that time, but a major re-engineering of the system took place in early 2022 and a number of parts were replaced, usually improving the operation of the system. Compared to approaches involving the Pluto SDR that have become possible since I built my system, my system may seem overly complex. or even outdated.
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 The general arrangement of the major components can be seen in the following block diagram.
+{{:qo100:qo-100_system.png?200|}}
+In November 2023 I tried my new IC-905 on QO-100. Unfortunately Omni-Rig as used by SDR Console was unable to control the IC-905 so frequency setting was done manually. The IC-905 fed directly into the SG-Labs 2400 MHz amplifier and the transverter was disabled. Also for simplicity the amplifier was set to be permanently on as no PTT line was available. The results were excellent, apart from the manual frequency setting, it was a joy to use. Setting the frequency on the IC-905 to match the expected uplink frequency for the downlink frequency displayed by SDR-Console worked extremely well. The uplink was perfectly set (thanks for the GPS based frequency stabilisation on the IC-905) and no further frequency adjustment was necessary. I did not buy the IC-905 for QO-100 work, but it was good to be able to use some of its microwave capabilities without having to (re-)build a portable microwave system.
 **Photographs**