[Elecraft] [KX3] ADC/DAC access, keyer input

[Christian KJ4VPK]

Sound card USB chips are tiny... Plenty of them, too. Volume cost is very very low, too.  Making it an optional feature if it really breaks the bank.. 

Not needing shielded analog cables seems like a beautiful thing.

-----Original Message-----
From: Don Wilhelm
Sent: Friday, August 19, 2011 10:55 AM
To: gmaxwell
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [KX3] ADC/DAC access, keyer input

I believe what you are asking for means full soundcard function in the KX3.
That does not seem reasonable to me.
Why should others who do not desire that internal function have to pay 
for it?  There are many (I would even say most) who want the KX3 for 
portable use (without dragging along a computer for a panadapter 
display), and that is its major design point as far as I can determine.

Your "trickle charge" suggestion means a voltage booster circuit would 
have to be added, and many of them generate RF hash.

Besides, I don't think there is room inside the KX3 for those things you 
are asking.  We are approaching the "Dick Tracy wrist radio" in the KX3 
- how much smaller can it get?  Many complain about the size of the K3 
buttons!

73,
Don W3FPR

On 8/19/2011 10:15 AM, gmaxwell wrote:
> Tony Estep wrote:
>> IF output connected over USB? Maybe you mean a BNC,
>>
> No. I mean USB, as in digital output, as is found on the USRP (for example).
>
> I see no attraction in yet another analog step that is only going to add
> noise and interference, complicate PTT and control signaling,  and leave me
> with a mess of more cables and boxes in order to interconnect it.  (What
> netbook has stereo inputs? what netbook has inputs that aren't full of
> spurious tones from the computer?)
>
> Conceivably the KX3 could be trickle charged (500ma at 5v) via a USB client
> connection, meaning a complete computer-enabled mobile station could be
> [antenna]-[kx3]-[netbook]-[power] which would be clean indeed.
>
>
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