This SDR was designed from some of my experiments so far, from various sources with improvements here and there so that I can get maximum results.

LO using Si5351A which is controlled by Arduino Nano produces a frequency that is wide enough Max 160Mhz, of course allows us to make Exciter up to 10M band. LO = work freq x 4.
My BPF takes from the us5ncj design using an already-built Inductor, so it is practical without the need to roll.
Parts of TX, RX, and RF Preamp are not much different from the SDR series in general such as Avala, Mchf, tulip and others. Only, I choose which is easy, simple, and the results are maximum.
RF Power Amplifier is intentionally not in this Kit, you can combine it with any RF Power. And the output of this Exciter is quite small at 10-50mW. In practice, you can use the former RF PA FT-80C, FT-180A or the other.