In reference to the KH6HTV amps, since they are not bidirectional, you will need to properly sequence the transition from TX to RX with the control of the antenna relay. The microwave users have developed some excellent solutions to do this that can be easily used to prevent problems. An example of these is the M2 model S3 unit, https://www.m2inc.com/FGS3, or the W6PQL design, https://www.w6pql.com/relay_sequencer.htm
The key thing with sequencers is that you do not want to run the amp when it is disconnected from a load or if it is connected to the receiver. Inline LNAs also need protection from high level RF.
In reference to the KH6HTV amps, since they are not bidirectional, you will need to properly sequence the transition from TX to RX with the control of the antenna relay. The microwave users have developed some excellent solutions to do this that can be easily used to prevent problems. An example of these is the M2 model S3 unit, https://www.m2inc.com/FGS3, or the W6PQL design, https://www.w6pql.com/relay_sequencer.htm
The key thing with sequencers is that you do not want to run the amp when it is disconnected from a load or if it is connected to the receiver. Inline LNAs also need protection from high level RF.
Jim W6US