[Elecraft] K3 - FSK hookup to ACC connector

[N2TK]

Just want to make sure before I plug it in.

For FSK, the manual states that pin #1 (FSK IN) in ACC jack has a pull-up
resistor to 5V. So I assume the standard NPN interface from a COM port will
work fine for that.

Pin #4(PTT IN) doesn't state it also has a 5V pull-up resistor. Does it so I
can use the same NPN type setup?

By the way, thanks for all the input I have received on setting up for RTTY
with my K3 and DXbase. Based on several inputs I am using Hamscope which
seems to interface well with the K3 and DXbase. AFSK is working fine with
just two cables between the K3 (LINE-IN and LINE-OUT) and audio card on PC. 
Now I want to set up for FSK.

73,
N2TK, Tony
#311