> Igor, > > Please explain how the 8 ms is relevant when using PTT instead of VOX. > > In PTT state, Keyout follows PTT (not the keyclosure) - so the amplifier > relay circuit should be closed > as long as the operator closes the footswitch or whatever is used for PTT > first. Keying will most likely begin long after the footswitch is > activated. In other words, the 8 ms is not relevant, and no hot switching > should occur.
> 73, > Don W3FPR Don, Think of SSB contest. You run high power and quite a bit of signal processing to have punchy signal. You press that foot switch and 8 ms later you already have some RF from ambient noise on the external relays that are not settled yet. Besides when in the contest quite often one starts speaking into the mike even before PTT foot switch is engaged. I for one cannot think of the sequence (press PTT, wait 30 ms, start speaking) when I am trying to work pile up at 6 QSO per minute. 73, Igor UA9CDC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
