[TRLog] CW Keying Circuit Question

n6tr@teleport.com n6tr@teleport.com
Sun, 6 Jun 1999 22:34:21 -0700 (PDT)

> My FT-1000MP just went on the blink and I have to send it back to Yaesu.  As
> such I will be using my Drake C-line as my main station for a while.  Does
> anyone know if the keying circuit in the manual using a 2N2222A transistor
> can key the T4XC safely or do I need a different circuit?

You need a PNP transistor.  Easiest way is to use the serial port
and use INVERT after the port number.  This will reverse the sense
of the output and allow you to use a PNP transistor instead of NPN.
The circuit remains the same.


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