The Australian company GenesisRadio is the producer of several kits for radio amateurs. They are mainly single- and double-band SDR transceivery. Novinkou je SDR transceiver pre pásma 160m až 6m, G59 . Základnú dosku G59 je možné rozšíriť o ďalšie bloky, napr. PA, ATU či transvertory na VHF bands. Currently, the first beta versions of this device are among radio amateurs.
You will read in the article
Declared parameters of SDR G59
SDR receiver
– tuning step after 1Hz, IIP3 32-35dBm – MDS: -116 to -122dBm (with preamplifier: -132 to -134dBm) – RX sensitivity is 0.15 – 0.2uV for 10 dB S/N – Suppression of unwanted mirror frequency -35dBc to -50dBc (hardware) or -60dBc (hardware + software) SFDR (Spurious free dynamic range) is 93-100dB to over 100dB for the G59C model – 1dB compression is at +10dBm signal level – the receiver has a second input for the RX antenna
SDR transmitter
– basic power is 10mW, with GPA10 10W – carrier frequency suppression 45-60dBc (hardware) – suppression of unwanted TX mirror signal: -35dBc to -50dBc (hardware) or more than 60dB (software) – built-in microphone preamplifier and electronic CW key with earpiece Vďaka Oliverovi MW0JRX mám možnosť zoznamovať sa so základným modulom G59 bez zosilňovača (výkon 10mw). Väčšina súčiastok na plošnom spoji je v klasickom prevedení s vývodmi, iba asi tridsiatka je v SMD prevedení. Na plošnom spoji sú aj všetky konektory. Obvodové riešenie zabezpečuje aj prepínanie RX/TX I a Q signálov vedených z/do zvukovej karty.
Zhotovenie kitu vyžaduje vraj vyše 100 hodín. Stavebný postup prebieha vo fázach, pri ktorých sa osadzujú súčiastky vo funkčných blokoch, napr. napájacie obvody, mikroprocesorové obvody a pod. Zapojenie určite nie je vhodné pre začiatočníka, aj keď konštrukčný návod je veľmi precízny a podrobný.
G59 SDR transceiver
Upravený PowerSDR
Although I received the G59 SDR transceiver already assembled and tested, the first attempts were not successful and the module appeared to be broken. Only the upgrade to the latest version of the Genesis software (modified PowerSDR by FlexRadio) meant a change and the first signals from the band were finally heard in the headphones.
You have to get used to the controls or use as much memory as possible. Depending on the bandwidth of the sound card, it is possible to work in the band segment where the oscillator is tuned (more precisely, the synthesizer Si570). The segment has a width according to the capabilities of the sound card, in my case 96kHz. For example, to fully cover the 3500-3800kHz range, four frequencies must be entered into the synthesizer.
The segment can be displayed in the form of a spectroscope, waterfall, etc. It is very advantageous especially when monitoring VHF bands, where it is thus possible to immediately register activity outside the frequency to which we are currently tuned. It is also possible to use the second receiver (the signal from the main RX goes to one earpiece, the signal from the second RX to the second earpiece).
The software provides great freedom in choosing a filter or improving the signal. A separate RX and TX equalizer is also a matter of course. In TX mode, it is also possible to turn on the compressor, IF shift (manual shift of the modulating signal relative to the filter, which achieves a different timbre of the voice), VOX,...
Here are some recordings with the SDR G59 from the bands
Príjem je veľmi dobrý a dovolím si tvrdiť, že v niektorých situáciách G59 SDR predčí mnoho klasických zariadení. Nedostatkom týchto zariadení je pomerne komplikované ovládanie, lebo všetky úkony je potrebné robiť myšou alebo z klávesnice. G59 ukazuje smer, ktorým sa bude vývoj zariadení uberať. Za cenu, ktorá je 349USD, je možné získať vysokokvalitné zariadenie.
From 
