[NLRS] Question about sequencing for an external RF amp

[David Palm]

I am just about done wiring the switching circuitry and RF relays to add an
external 1296 MHz amplifier to my transverter (thanks, N4PZ!)  I know that
there should be some sort of sequencing so that the relays don't hot
switch, holding off Tx RF until they have had time to switch.

But while I've been pondering how to do that in this specific case (any
suggestions are welcome), I thought about the TE Systems, Mirage, etc.
amplifiers we regularly deploy on 144/222/432 MHz.  We don't have to do any
additional sequencing for these amps, we just plug in PTT and RF from the
transceiver and go.  Is this because the PTT signal out of our modern
transceivers is already leading the RF output by xx milliseconds, so we
have that time built in for the relays to switch?  If so, do I need to do
anything else in this case, where I'm building my own relay transfer
circuit?

Thanks and 73,

David  W9HQ