uBitx v6 modifications, Part I: The uBitx is a very nice radio but the missing AGC is an ear killer. I decided to purchase an AGC board from kit-projects and soldered it onto the radio main board. It’s tiny and I was afraid to damage something but it turned out fine.
Yesterday I received and built my new uBitx v6 QRP transceiver. Connected to a LiPo battery and the 4-BTV vertical it gave me a few QSOs with Bosnia, Denmark, Poland and Austria. Very impressed so far!
The first mod will be the addition of an AGC.
About This script queries the QRZ.com callsign database and returns the result to the command line. A XML subscription plan with QRZ.com is required for full functionality.
You can download the script here: https://git.qrz.is/clemens/qrz.sh
Installation Copy the file .qrz.conf into your home directory Copy the file qrz.sh into a directory that is in you PATH variable Set the correct file permissions: chmod u+x qrz.sh Dependencies curl Configuration Edit the file ~/.
New project: raspberry pi controlled remote antenna switch. One remote rpi for triggering the 4 relais inside the antenna switch and one rpi connected to the TRX in the shack measuring the ATU port’s voltage to fully automatically choose the correct antenna for each band.
Update: The antenna switch itself is assembled and working. Next step: interfacing the pi and coding a simple web service which will be used to select an antenna via network.
Why and what This aricle describes the construction of a 9,50 m long dipole for the 30 m band (10.1 MHz to 10.15 MHz). It was designed to be mounted ca. 6m above ground inside an attic. The calculations were performed by OE1MEW with the help of this antenna calculator. To reduce the length of the ~15 m long dipole, a coil will be integrated into each side of the dipole.
Mods The following is a compilation of some recommended mods for the Xiegu G90. None of these mods are my idea, I learned about them from the Xiegu G90 group.io group (see below).
Power Cable The original power cable is too thin and should be replaced with silicone 14AWG cables plus some ferrite beads. Don’t forget to integrate a 5Ah fuse into the cable.
Mine looks like this now:
Microphone Mod When using the original G90 microphone, your voice might be too bassy.