Archivo delle Categorie: QTX!

RedPitaya as Vector Network Analyzer

Coupler Red PitayaFor using the RedPitaya as Vector Network Analyzer you will need some extra part: a coupler like the Mini Circuits ZFDC-10-1-SMA, that will be used in the reverse way, and a VNA calibration kit with open, short and load connector. Should be also really useful a pair of 10db attenuator and a SMA tee.

The software is made by two part: server for the RedPitaya and a client. I’ve use the Windows precompiled version on OSX via Smith Chart red PitayaWINE: worked at first try.

The result are pretty good and beyond my expectation! The client is really clean and easy to use and the RedPitaya is working really nice and fast.

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AirSpy Mini and OSX

GQRX AirSpy MiniAirSpy mini works fine out of the box with both GQRX and CubicSDR. For GQRX you have to manually enter the input rate to 3.000.000 o to 6.000.000. In the picture it is used as panadapter for the FT-450 via G4HUP pat. The dump in the gain is due to the roofing filter of the FT-450.

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RedPitaya as Panadapter of the FT-450

RedPitaya FT-450 panadapterThe last alpha version of CubicSDR now include Hamlib. This will allow an SDR device to be used as panadapter for a transceiver. Here the signal is picked up via the G4HUP PAT. Setup it’s really easy.


Pubblicato in QTX! | Etichette: , , , | Scrivi un commento

Voltage Regulator for RedPitaya

RedPitaya voltage regulator

I’ve just changed the switching voltage regulator with a ST L78S05CV, that it’s rated 2A, and some capacitor. Now also the VLF band is noiseless.

Pubblicato in QTX! | Etichette: , , | Scrivi un commento

Welcome to QTX!

QTX! will be a new way that I will use to share all the works I’m doing on my lab. Usually when I made a small change or improve something on my shack or find something interesting, I share it on Twitter.

Many asked for a more easy to follow way: this is QTX! This will be mainly in English. Don’t aspect long post, will be for sure around 140 characters 😉


Pubblicato in QTX! | Etichette: | Scrivi un commento
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