27MHz RC no dig. outputs but with telemetry

This telemetry option consists of two 27RD mini-receiver PCBs without digital outputs and equipped with the AX5043 transceiver IC. One is used ashore and the other in the vessel.
These receivers have smaller dimensions because they do not have digital outputs.
The electronic design is such that they can not only receive but also transmit (30mW). This enables half-duplex communication (i.e. telemetry).
Both receivers have different software. The receiver PCB ashore acts like a relay station for data going back and forth. The receiver PCB in the vessel behaves more like a controller. Receiving is just one of its function.
Due to the lack of digital outputs only piston tanks are supported.
RD27 mini receiver without digital outputs

The image below shows the RD27 mini receiver and the auxiliary PCB installed in my model submarine.
45x83mm
