Re the AM quality question I can't detect any clicking or other distortion
but then there are no high quality AM BC transmissions round here - they're
messed up either with selective fading or because the transmission comes
from more than one location on the same frequency.
The noise in between a
I haven't noticed any clicking either.
As to selective fading, it sure would be a good thing if the AM sync
detector were high on the priority list. I hate it that my manual
continues to be so out of touch. Or maybe I'm the only K3 owner who
is not a CW Contester or operator of
I am using an unmodified #705 K3 with the AM filter only. Using amplified
computer speakers with RF filtering. The AM BCB/SW sounds as good or better
than any I have around the house including an old Hallicrafter SX-100 and
two Yaesu's. Better than car AM also. Maybe the problem on some units
Wes Stewart wrote:
Following are links to plots that demonstrate some of the fun I'm
having. The first two are taken using Spectrum Lab to look at the Line
Out audio signal from the K3. The input signal is from a homebrew 28.7
MHz crystal oscillator/buffer with about a -70 dBm output
Wes Stewart wrote:
For the second plot, *nothing* has been changed except the AGC button was
toggled to Fast.
http://k6mhe.com/n7ws/K3_AGC_Fast.jpg
Very interesting - looks like an 80hz signal from somewhere is mixing with
the fundamental.
73,
Barry N1EU
--
View this message in
--- On Mon, 2/2/09, Bill W4ZV btipp...@alum.mit.edu wrote:
From: Bill W4ZV btipp...@alum.mit.edu
Subject: Re: [Elecraft] K3 AM reception
To: elecraft@mailman.qth.net
Date: Monday, February 2, 2009, 10:01 AM
Wes Stewart wrote:
Following are links to plots that demonstrate some of
the fun I'm
--- On Sun, 2/1/09, Jim Garland 4cx2...@muohio.edu wrote:
I've been reading a thread on another email reflector about the K3's audio
response on AM. One of the reflector participants is a serious SWBC listener
and is very dissatisfied with his K3's AM audio. He has pointed out a few
things
I've been reading a thread on another email reflector about the K3's audio
response on AM. One of the reflector participants is a serious SWBC listener
and is very dissatisfied with his K3's AM audio. He has pointed out a few
things about the K3 AM response which puzzle me. Here they are:
My K3
.
73,
Bob W5OV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Garland
Sent: Sunday, February 01, 2009 9:08 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 AM reception
I've been reading a thread on another email
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Garland
Sent: Sunday, February 01, 2009 10:08 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 AM reception
I've been reading a thread on another email reflector about
the K3's
My K3 sounds great on BCB/SW AM reception - in fact I'm listening to it
right now. I have the FM filter and the DSP BW cranked up to the maximum.
It reads 10 KHz, but I am using far from the latest version of firmware.
I'm using the West Mountain Comspkrs on the rear speaker jack. They are
I have run a number of tests on my K3 regarding low-level BFO-like
whistles reported during AM reception.
Signals less than -16 dBm (57 dB over S9) do not exhibit this behavior,
but signals above this strength do.
For the time being, if you are listening to an AM station that is this
huge,
Seriously, we'll investigate further to see what can be done about this.
But in the meantime, please understand that only huge signals exhibit the
symptom, and then only if you are not tuned to the station's carrier
frequency.
73,
Lyle KK7P
Wow, Lyle! It sounds like with a little
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