Jean,
You might want to take a look at the K2 Digital Interface Box on my
website www.w3fpr.com for some ideas.
My K2 digital box switches between the microphone and the digital
interface, so I can use either mode at a flip of a switch. I have also
put a fixed audio output circuit in my K2 and route the audio output to
an unused pin on the mic configuration header so only one cable is
required between the K2 mic jack and my interface box.
Most any soundcard will work for digital modes (even the computer
internal card). The real difference for digital modes is the noise
level of the soundcard. Jim Brown K9YC has recently done some testing
and has recommended a couple of external soundcards. You might want to
look at the reflector archives for his posts over the last 4 months.
73,
Don W3FPR
On 1/24/2015 1:23 AM, 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 EC2 project 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
EC2-box without any PC support(connectors and so on)
You must now that I must solder my DC transceiver PC isolation circuit to
this soundcard as well.
I presume I could not solder on a standard PCI slot of sutch soundcard,not
talking about supplying this unit and so on
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 (addresses where to buy)around.
I hope someone could help my with my request.
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