Wojciech Kaczmarski

Move the connector closer to the edge of the PCB, so that it's not hidden below the display.

How about adding a metal frame for RF PA heat dissipation and shielding?

Both linear regs get warm, how about using DC/DC converters? I know it's an RFI issue ;-)

@DO5RB: change the position of C86, as it disturbs the arrangement of the two 18650 cells

Add a Bluetooth module to the v3 of TR-9

Power output

5

1. Power output is limited to 0.75W. At that power, the bias voltage is 2.9V. 2. There's a high pitched sound audible when PA is active. ALC circuitry works.

Pads are too small, it's hard to solder wires to them.

LED control lines

1

We need to add LED control lines (uhm... cathodes) to the interconnecting ribbon.

CRC, Golay and convolutional encoder

4

Provide a CRC value for some example LSF, like SRC: A1BCD, DEST: E2FGH, TYPE: 0x0005, CAN: 0, META: 0, reserved bits zeroed. Just so the reader/implementer can test his/her code...

As some radios like to invert phase at both tx and rx, it would be wise to have an option to enable phase inversion in software.