The uSDR was successfully updated to firmware version 1.02x. This was not a simple task. The programming six pin header is located under the LCD display. Access requires almost complete disassembly. I made a cable to connect the Arduino UNO acting as a programmer to the uSDR which fits under the LCD display. I went through the programming process three times. The first time, the 1.02x firmware was uploaded without any changes.

I was disappointed 1.02x leaves the tuning knob so that it turns clockwise to decrease frequency. The second and third uploads involve changes made to the firmware as shown below. To have the tuning knob increase frequency in the clockwise direction, the line beginning “#define SWAP ROTARY…” had two forward slash marks in front of it which converts it to a comment. I removed the // marks to reverse the rotation direction.
The third upload was due to the line starting “//#define F_XTAL 27005000…”. This line did not have the // in front if it which meant it was expecting the uSDR to use a 27005000 Hz TCXO. The uSDX+ uses a 27 MHz TXCO but the uSDR has a 25 MHz TCXO so the // had to be added to the line “#define F_XTAL 27005000…” and removed from the line “//#define F_XTAL 25000000…”.

If another upload is necessary, it would be a good time to add a header in a location that does not require so much disassembly to access it. After compiling the firmware the Arduino programming environment shows the resources left for the Atmel mega328. Very little in terms of memory is left.
This is a re-examination of the speaker/microphone for the uSDR. From Internet searches, this appears to be a version of the Oppxum, KMC-21 which is available with various connectors.
As described earlier, the KMC-21 connector is wired as shown below,

However, an examination of how the uSDR connects is shown below. The uSDR reverses the positions of the speaker and ground connections from the KMC-21.

The KMC-21 works without modification as shown below. The uSDR grounds Ring 2 not the sleeve with the result that the PTT switch and microphone return to ground through the speaker.

In the photo below, if the black and white wire positions are reversed results in the modified version where the PTT and microphone do not return to ground through the speaker. The KMC-21 OEM configuration is standard for most microphones with the sleeve as ground. It is pretty unusual to use Ring 2 for ground.

The front panel speaker did not turn off when the speaker/microphone is connected but it does turn off if a speaker is plugged into the the separate speaker jack.