> be another transmitter at the end of the CTCSS users session etc. Speed of > detection is an issue, and you will find specs that have this all over the > place (Up to 500mS (Again for Wagner)), best to aim for sub 200mS, else > users will get a bit upset. Uh oh! What's that formula for converting units of conductance to units of time again? s=S**(Pi*c) where: s = time (seconds) S = conductance (Siemens) Pi= something for you to nibble on while you read this drivel c = constant of amazement that S gets mis-used for units of time, time and time again! So much humour, so little time. :) (And there's even a Pi*c in there!) Wayne