[Elecraft] K3 can't key CW from Writelog

[Josh Fiden]

Looking at schematic for KIO3, I see that DTR and RTS are a hardware 
selection to control PTT or KEY_IN via Q3-Q6 based on how U5 outputs are 
commanded. This is likely a hardware problem.

Has this been seen or can anyone confirm? Thanks.

73,
Josh W6XU

On 11/2/2013 6:15 PM, Josh Fiden wrote:
> I'm trying to key CW via Writelog. Writelog only allows dtr for this. 
> I'm testing using another program and this is what I've discovered:
>
> 1. K3 set PTT-KEY = Off-dtr and sending on dtr, K3 sits there like a 
> bump.
>
> 2. K3 set PTT-KEY = Off-rts and sending on rts, K3 keys CW fine.
>
> 3. K3 set PTT-KEY = dtr-Off and sending on dtr, K3 "keys" the TX LED.
>
> Problem appears to be K3 not responding dtr when it is assigned to KEY.
>
> Any ideas?
>
> Thanks & 73,
> Josh W6XU