[Elecraft] Going 2014 with my K2

[Dave Barr]

> Date: Wed, 23 Apr 2014 21:30:55 -0400
> From: PHILIP GRAITCER<pgraitc at me.com>
> Subject: [Elecraft] Going 2014 with my K2
>
>
> I love my five year old K2, and although I have a K3, I?d like to keep using the K2 for the field and digital. .......
>
> 2. Digital modes. Don has a nice solution to digital modes on the K2, but are there updates? What are others doing to go digital with their K2s?
>
> Thanks,
> Phil
>
> Philip L. Graitcer, W3HZZ
Hi Phil

For many years my K2 (sn 537) has performed admirably (over 250 digital 
entities at 5 watts and over 100 at one watt) on RTTY, PSK and JT65/9 as 
well as a few other digi modes with a very basic set up: Direct 
connection from K2 to a laptop with small transformer isolation, bypass 
caps and ptt circuits built into the patch cords, all connecting at the 
K2 mic connector after running RX audio to an unused mic connector pin.  
The rx audio level is NOT constant, but I have never found this to be a 
problem.  Software now is MMTTY (with N1MM for contests), WSJTX2 and 
Digipan, etc.  On RTTY I use somewhat lower than the standard 2125-2195 
hz tones to allow for the K2 bandpass.  My K2 has not been updated for 
at least 6 or 7 years. Schematics for the audio isolation and ptt 
circuits are available on AA5AU's website.

73, Dave, K2YG