radio, electronics, security, silly hacks
The uSDX+ is a nice little transceiver from china based on the uSDX project. It is cheap, works on 8 bands, is based on opensource software, and has enough place inside the case to do some modifications. And if it breaks, it is easy to fix (probably easier than many analog radios).
So let’s see what we can modify in this radio.
The following modifications will be for the uSDX+ (uSDX plus), with the board marked Ver 3.0, but other radios may be similar and similar modifications may apply.
The (tr)uSDX has hardware to measure the power amplifier voltage/current/input power. Since the output power is also measured, it can calculate and show efficiency. This is very useful for tuning the class-E output stage, and is also useful in the field to see battery voltage and other parameters.
I have an uSDX+ transceiver from China. Let’s add the power monitor to it too. This description should apply to other radios based on the uSDX.
Continue reading “Adding an INA219 power monitor to a chinese USDX+ transceiver”
The (tr)uSDX transceiver has a builtin SWR meter. It will measure SWR and forward/reflected power. This is very useful in the field, because there is one less device to carry.
I have an uSDX+ transceiver from China. Let’s add the SWR meter to it too.
Continue reading “Adding an SWR meter to a chinese uSDX+ transceiver”