Shown below is the Block Diagram for the 20M PNP SSB Transceiver steered in the Transmit Mode. The components shown in the dotted block are relay steered so that the block module is single pass and amplifies in a single direction.
The Block diagram show steered in Transmit.
Essentially the steering process works so that the IF Module input follows the Balanced Modulator on Transmit and then the input side follows the Receive Mixer on Receive. All done with some relays and a bit of RG174U coax.
For those who count things in detail, this block diagram is not unlike what was used for the PSSST Transceiver which can be found on my website. Yes, a warmed over P3ST only using PNP devices.
TYGNYBNT.
73's
Pete N6QW