Hi Walter,

In the K3S, we could move the KIO3B digital electronics to the upper section of the main board, far away from the RF board. The main board is also a multi-layer type, so we could sandwich most of the noisy digital signals between signal ground planes, shielding them pretty effectively. This solved the problem of digital noise getting into the K3S rx. In the KX radios, digital noise would be in close proximity RF boards, so that opportunity is not available to us.

73,

matt W6NIA


On 3/30/2017 7:58 AM, Walter Underwood wrote:
That was my single complaint with the KX3, even before I bought mine. My 
current setup is a rats nest of wires.

On this list, five years ago, Elecraft said that the USB chips were too noisy 
to be inside the radio. I presume they found a way to deal with that for the 
K3S, but they have more room to work with there.

wunder
Walter Underwood
wun...@wunderwood.org
http://observer.wunderwood.org/  (my blog)


On Mar 30, 2017, at 4:03 AM, Peter Pauly <ppa...@gmail.com> wrote:

USB Audio. Should have been in the radio from the beginning, especially the
KX2 since it's new.

On Thu, Mar 30, 2017 at 2:42 AM, Karl DK5LP <dk...@online.de> wrote:

My greatest wish:
A schematic for the KXPA100/KXKAT100.


vy 73 de
Karl-Heinz, DK5LP /  AK5LP

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[Shiraz]

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