There's an X shown? under the? dropper to GND front end of regulators (as per schematic) .? That's? in fact a form of PTT line.? My poor eyes did not see that first up and of couse I did not RTFM .. what sort of moron do you think I am? ??
? If that had a BS 170 or even 2n7000 squeezed in you 'd have a 5V active PTT (isolated system) .? I'll dig out a very nice? Fr design which sshows? a carrier operated relay system (COR)? basic design for those who well? want to be different.? Remember COR? can be problematic with SSB as when voice levels diminish at some point the? COR relay / mosfets are going to drop out.? With maintained carrier systems like AM and NBFM this is never an issue.
Timothy Fidler