Hi
> On Aug 8, 2020, at 4:15 PM, Hal Murray <hmur...@megapathdsl.net> wrote: > > > kb...@n1k.org said: >> Same basic issue, lots of weird interactions and a need to keep the signal >> very precise. Not as easy as it might seem. > > What does "precise" mean in that context? > > I'm not an antenna-nut. Can an antenna miss-match change anything other than > the amplitude? Sure, it also changes phase …. > > How do you automatically tune something like that? Measure it and feed the result into a servo …. > The manual way would to > twist the knob while watching a meter. If the meter goes down, you are going > the wrong way. If it goes up, keep going until it starts going down, then > back up to the peak you just passed. > > How do you even know that it needs tuning? Can you measure something > accurately enough? If so, what? S11 back into the antenna if it’s an RX antenna. If it’s a transmit antenna SWR is the normal thing to monitor …. Bob > > > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.