[Elecraft] K3-RTTY-No Diddles

[paul ecker via Elecraft]

Don - The Output of DK II is connected to the K3 ACC port using a DB15-EL-K3 cable supplied by microHam with the DK II.
73 Paulkc2nyu
----------------------------------Paul,

Details on how you are connecting the DKII FSK output to the K3 please.

A quick perusal of the DKII information indicates to me that the FSK 
output is from a computer COM port - which to me indicates that it is 
RS-232 levels.
Those RS-232 levels must be converted to TTL levels by a "one transistor 
keying circuit" and the output of that circuit applied to the K3 ACC 
connector pin 1.

The fact that you have a single tone indicates to me that you do not 
have anything connected to the K3 ACC connector that will pull pin 1 to 
ground.  That means that the K3 will generate the space tone, but there 
is nothing to tell the K3 to change the tone to a mark tone.

73,
Don W3FPR