[Elecraft] :K2 Homebrew external digital interface with build-in soundcard device

[Don Wilhelm]

Jean,

I am a little confused by your questions (it may be a language thing).
I assume that you have the K2 "twins" which have the KPA100 and KAT100 
in the separate EC2 enclosure (I do not know what an "ECS-box" might be, 
so I am making assumptions).

If you want computer control of the K2 Twins, you must have the KIO2 
mounted in the base K2, and the computer connection must connect to the 
KIO2 in the base K2 (the RS-232 function of the KPA100 is not operative 
in the K2 Twins configuration).

The digital interface is a separate item from the computer RS-232 
control interface.
A standard PC soundcard will work just fine for digital modes.  Yes, it 
is best to use audio transformers to isolate the PC noise from the 
digital audio stream.

If you are asking about something different from my assumptions, please 
ask again -- there may be a language problem here.

73,
Don W3FPR
On 1/23/2015 11:04 PM, Behiels jean-Pierre wrote:
>
> Hi Elecraft members;
>
> I already have build a K2/10.
>
> My next project is to homebrew a digital interface for general purpose 
> with external soundcard into a separated Elecraft ECS2 enclosure.
>
> Is there anyone who could give my some addresses and advise witch kind 
> of soundcard is usuable for this purpose ?
>
> I presume a standard PC soundcard is not really useful for build-in in 
> a ECS-box without any PC support(connectors and so on)
> You must now that I must solder my DC transceiver PC isolation circuit 
> to this sound card as well.
>
> I will work with some small audio transformer and some opto couplers 
> for the DC isolation between both (transceiver and PC USB port).
>
> I look forward to receive some idees and any good designs and some 
> usefull information around.
>
> I hope someone could help my with my request.
>
> Kindly regards Jean ON4AEF.
>
> *E-mail : **on4aef at telenet.be <mailto:on4aef at telenet.be>***
>