[Elecraft] K3-RTTY-No Diddles

[Don Wilhelm]

Paul,

Make a test connector from a DB15 connector - so you can manually short 
between pin 1 and pin 5 - do not connect the Microham supplied cable.
Start the 'send' process, listen for the single tone, then short between 
pin 1 and pin 5 - the tone should change.  If it does, than the K3 is 
OK, look for the problem in the Microham box or the cable.
If the tone does not change with that test, contact Elecraft support.

73,
Don W3FPR

On 2/7/2015 10:00 PM, paul ecker via Elecraft wrote:
> 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
>
>
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