[Elecraft] [KX3] RS232 xcvr control when serial ports are occupied

[George Danner]

In broadcasting - we learned very quickly interfacing equipment with RS232, 
that if it worked once it would continue to work.

Back in the beginning of using RS232 interfaces (cira. 70s) one of our the 
engineers made a box with input/output pigtails in both male and female with 
a rotary switch that switched between straight through and "reverse" for all 
the various signals. Later we added 9 pin pigtails. Using that box quickly 
let us know what would work and how to make the interface cable.

73
George AI4VZ


-----Original Message----- 
From: Walter Underwood
I never really understood RS-232 until I read “Technical Aspects of Data 
Communication” by John McNamara. Very clear. Not sure it is worth getting 
the book just for that, but you might check a library.