The Spota Tube is a single-channel tube transceiver—essentially a tube-based version of the Pixie.
It is something for nostalgia enthusiasts. The keyer is a concession to the present.
The output power is approximately 1 W, and the tube heater supply runs on the standard 12 V provided by three LiPo batteries. For the anode voltage, I use ten of the standard 9 V rectangular batteries—the kind familiar from 1960s transistor radios—connecting them alternately to the contacts.
The image shows the prototype with point-to-point wiring.
The PCB was designed using EasyEDA and manufactured by JLCPCB. Those in the know can download the schematic and order the pcb here https://oshwlab.com/dl1cr/spotaone1_copy_copy_copy
