5:54 AM
Subject: Re: [Elecraft] Noise with KUSB
Hi Mike.
Thank you for answering!
I have the KUSB adapter from Elecraft. Do you suggest that I make
a short
cable like you did between the K3 and the KUSB?
The noise is specially irritating on 6 m. I don't have a preamp
yet, but
building one
K3 KUSB PC communicating with K3: +10dBV
K3 RS232 cable KUSB PC communicating with K3: +0dBV
I wonder if physical proximity of the USB-serial adapter to the rear
of the K3 is the cause of the problem? Maybe a magnetic coupling into
the RX?? I'm guessing.
73
Gary ZL2iFB
I recently discovered the source of a very annoying noise in my K3. When
unplugging the USB cable from my USB hub the noise in the receiver
disappears.
How do I get rid of this? I am using HRD, so a connection to my PC is
really needed...
73's Svend, OZ7UV
Svend, have you tried isolating the K3 and USB hub by using chokes on all of
the K3's inputs and outputs and the USB hub's outputs plus power adaptor
input?
73 de James K2QI
On Tue, Aug 4, 2009 at 6:38 AM, Svend Spanget span...@privat.dk wrote:
I recently discovered the source of a very
I recently discovered the source of a very annoying noise in my K3. When
unplugging the USB cable from my USB hub the noise in the receiver
disappears.
I had posted on this topic a couple weeks ago. I didn't discover my own
noise problem until I was looking at the noise floor with a SDR-IQ
You've found the noise source; now find a way to eliminate or replace it.
Does your USB hub use a wall-wart power supply? Some of these are noisy.
Maybe you have another USB port on your computer to which you can connect
the KUSB directly, bypassing the hub? Also, some USB hubs work OK with the
PS
On Tue, Aug 4, 2009 at 6:38 AM, Svend Spanget
span...@privat.dk wrote:
I recently discovered the source of a very annoying noise in my K3.
When unplugging the USB cable from my USB hub the noise in the
receiver disappears. How do I get rid of this? I am using HRD, so a
connection
Thanks for the replies, all.
I'm using a laptop PC with 3 USB ports. With mouse, keyboard, harddisks
and other devices I am using 3 USB hubs
Plugging the cable from the K3 directly into a USB port on the PC does
not remove the noise. The hub doesn't have a PSU, but there are a lot of
small
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