Hello,
playing around with the new P3 and K144XV, I've realized that I have
many carriers spaced roughly 30 kHz, which are also audible in the K3
(so probably not a bad K3-P3 coax). See the top screenshot in this image:
https://www.dropbox.com/s/t29sf9bwfpedspa/vhf-carriers.png
When I move the
Getting started in the ARRL 10, I discovered a weakish signal on the P3
15 KHz below the VFO A cursor that moves when I tune A. Ref level is
-125dBm, signal is about -110dBm. I don't remember ever seeing it
before. 15KHz is suspicious, I don't see it on other bands. Hope all
is OK with my
Perhaps it's a full moon tonight, about the only explanation I can come
up with. There were actually two of them, +/- 15KHz from where I was
tuned. They were annoying since they moved when I tuned, and made
interesting pictures on the P3 waterfall since they were strong enough.
I have never
We're actively chasing a few cases where this has happened on the RBN.
Obviously we'd prefer it didn't. One hypothesis for phantom spots on
the low bands is strong AM broadcast stations causing clipping and
resulting in intermod. Another appears to have been caused by
interaction between
From the SoftRock Lite build
guidehttp://www.wb5rvz.com/sdr/sr_lite_ii/02_lo.htm -
I guess this could explain what we're seeing:
Sub-harmonic Sampling
Alan, G4ZFQ points out that on the 30m, 20m, 15m receivers, the Local
Oscillator produces a signal that is 4/3 times the desired center
M0TRN replied to K8AZT:
I had this happen to me a few days ago where I was calling CQ on 7.015 and
was spotted on 14.0614 by Tim KQ8M's skimmer. I emailed KQ8M to ask him if
there was a problem with his skimmer. He replied that he wouldn't rule out
that the problem was in his Rx setup, but it
Thank you to all who have taken the time to respond to my question regarding
possible false spots by the skimmer receivers used for reporting on
reversebeacon web site. I appreciate all the responses.
73,
John/K8AZT
__
Elecraft
This is way OT, but false decodes like T2DE are quite common when a
Skimmer is listening in the RTTY area of the band.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary K9GS
Sent: Tuesday, January 24, 2012 11:49 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 spurious radiation?
I've seen this happen before and it has also happened to me. Once I
: Wednesday, January 25, 2012 14:05
To: 'Hanford R Wright'
Subject: RE: [Elecraft] K3 spurious radiation?
Hello.
I have a question for you as well. Been a ham for 50 years. What is CRA
#1515 CCA# AC-11-12590?? Don't believe I've seen that before.
73 de Terry, W0FM
-Original
I have not been monitoring this mail list much recently so I apologize if this
subject has been discussed previously.
I like to monitor the reversebeacon.net website while calling cq or just
monitoring looking for a qso. Recently I have discovered a situation which has
me puzzled and I am
Hi John,
I had this happen to me a few days ago where I was calling CQ on 7.015 and
was spotted on 14.0614 by Tim KQ8M's skimmer. I emailed KQ8M to ask him if
there was a problem with his skimmer. He replied that he wouldn't rule out
that the problem was in his Rx setup, but it was tuned to 20m.
There are -many- bogus spots showing up on the
DX Summit site, and most seem to originate from
skimmers running amuck. W3LPL's seems to
be among the largest error generators.
73!
Ken - K0PP
__
Elecraft mailing list
Home:
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken G Kopp
Sent: Tuesday, January 24, 2012 11:56
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 spurious radiation?
There are -many- bogus spots showing up on the
DX Summit site, and most seem to originate from
skimmers running amuck. W3LPL's seems
To: 'Ken G Kopp' kengk...@gmail.com; elecraft@mailman.qth.net
Sent: Tuesday, January 24, 2012 10:24 AM
Subject: Re: [Elecraft] K3 spurious radiation?
Hi to the list
Even though I am an extra I am still a newbe in HF could someone please
explain what a skimmer is and its function? Thanks
: [Elecraft] K3 spurious radiation?
Hi Han...
See here:
http://www.dxatlas.com/CwSkimmer/
These things can be interfaced with packet to send out spots for
everything they hear!
73, Roger
On 1/24/2012 1:24 PM, Hanford R Wright wrote:
Hi to the list
Even though I am an extra I am still a newbe
almost 54 years and loving my K3!
73,
Rich - K1HTV
= = =
-Original Message-
From: Ken G Kopp [mailto:kengk...@gmail.com]
Sent: Tuesday, January 24, 2012 11:56 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 spurious radiation?
There are -many- bogus spots showing up on the DX
Thank you Tom, Geof, and Eduardo for responding. I feel a bit better that I am
not alone experiencing this situation, however want to prove it is not from my
rig.
I started wondering since the skimmer rx's are sdr's, this might have something
to do with digital sampling aliasing. If the
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John/K8AZT
Sent: Tuesday, January 24, 2012 5:16 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 spurious radiation?
Thank you Tom, Geof, and Eduardo for responding. I feel a bit better that I
am
A comment on the standby receiver ... Its a good idea but like any piece of
test equipment its important to know its capabilities. If you don't hear any
spurs on it you are probably ok. On the other hand, if you do hear spurs,
don't get too excited. Local receivers will often hear things that
I've seen this happen before and it has also happened to me. Once I was
on the low end of 40M and the W3LPL skimmer spotted me just below 7100.
go figure.
If you watch skimmer spots you'll often notice weird things showing up.
One of the JA skimmers regularly spots T2DE on 40M. There
I have noticed that pskreporter.info often spots me on the wrong band as
well. I think there must be some glitch in the software. I've never been
spotted on the wrong band by the cw skimmer network (that I'm aware of).
-Matt NQ6N
On Tue, Jan 24, 2012 at 8:49 PM, Gary K9GS garyk...@wi.rr.com
This is not a solution. It is a workaround. :)
73, zoli ha1ag
- Original Message
Yes, a well known issue for a LONG time...with a SUPER EASY solution.
It is indeed due to the internal speaker.
A year or so ago, I got a call from a local (a couple miles away) that
he had a spurious
There sure are a lot of workarounds with the K3, the
list is quite long by now.
Jim
-
Zoli Pitman HA1AG wrote:
This is not a solution. It is a workaround. :)
73, zoli ha1ag
- Original Message
Yes, a well known issue for a LONG time...with a SUPER
Jim,
Can you be specific about your perception that there are a lot of
workarounds. I consider this to be the only one.
There are enhancements being worked on - ideas that have mainly come
from requests on this reflector, but those are not hardware related like
this one seems to be.
I wonder
Yes
Tuning pulses, diod and resistor fix
Lots of spurs here and there, FW workaround fix
IMO that is serious design flaws and and the
fixes are sort of workarounds on the design,
I would not call the fixes enhancements.
Those two just from the top of my head.
On the internal speaker: I never
I have # 1239. This happened to me the first time I got in a contest
from home with the K3. I usually don't bother using headphones unless
there are other ops around. I got called down on the air by a European
station that was up 500 Hz on 20m at the height of the opening. I was
running 1500
Hi all,
This is a rather long thread and I am not sure how relevant this response
is, but I'll risk it anyway. I use headphones 99% of the time, but when I
need speakers (as when I want other people in the shack to listen in) I use
a pair or of amplified computer speakers by JBL that came with
Yes, a well known issue for a LONG time...with a SUPER EASY solution.
It is indeed due to the internal speaker.
A year or so ago, I got a call from a local (a couple miles away) that
he had a spurious on his K3 (I helped him build it). I listened,
yes it was there. When he switched from the
To: Elecraft Reflector
Subject: [Elecraft] K3 spurious
Yes, a well known issue for a LONG time...with a SUPER EASY solution.
It is indeed due to the internal speaker.
A year or so ago, I got a call from a local (a couple miles away) that
he had a spurious on his K3 (I helped him build it). I listened
On 2 nov 2009, at 12.02, Bill W4ZV wrote:
Two Topband buddies have now reported a bad spur with relatively new
K3s
(April or May 2009) at only 20 dB down about 16 kHz from the
fundamental.
I found it useful to fiddle with the routing of the coax cables from
the synthesizer modules to
This problem was reported about TRANSMITTED spurs, not spurs heard in K3
receiver. 73, Guy.
2009/11/9 Björn Mohr b...@broadcast.se
On 2 nov 2009, at 12.02, Bill W4ZV wrote:
Two Topband buddies have now reported a bad spur with relatively new
K3s
(April or May 2009) at only 20 dB down
On 2 nov 2009, at 12.02, Bill W4ZV wrote:
Two Topband buddies have now reported a bad spur with relatively new K3s
(April or May 2009) at only 20 dB down about 16 kHz from the fundamental.
2009/11/8 Björn Mohr bjorn.m...@gmail.com wrote:
I found it useful to fiddle with the routing of the
Two Topband buddies have now reported a bad spur with relatively new K3s
(April or May 2009) at only 20 dB down about 16 kHz from the fundamental.
If you received a unit in this approximate time frame, you may want to have
someone check about +/- 16 kHz for the -20 dB spur. The fix from
Walt,
I suggest that the K3 owner contact k3supp...@elecraft.com for assistance.
Many on-the-air comments that I have heard pass along inaccurate
information (about many subjects, not just the K3). The only K3 mods
that I know about involving diodes are the KPA3 12V Sense Mod and theK3
VFO
My buddy K1VW, who is not on this reflector, asked me to look into a
problem with his K3, and I am turning to the reflector for assistance.
John received a report from another station (not a local) of a spurious
emission while transmitting CW on 160 meters. Evidently the spur was
loud enough
Mario said
What I noticed is that in CW mode, with VOX/QSK to OFF, when
accidentally hitting the paddle, the T/R and all the other connected
relays would spring into full-qsk-style action, ie. activate for
each single dot (with PTT/XMit not pressed). No HF is being generated.
I agree
Hi,
I have brought my K3 to our local club station to see how the K3
would play within a contest setting. We use the external T/R
output to control various things, like the PA.
What I noticed is that in CW mode, with VOX/QSK to OFF, when
accidentally hitting the paddle, the T/R and all the other
Hi Mario,
this is very long time known behavior see
http://www.zerobeat.net/smf/index.php?topic=215.0
This is not error as output port is KEY OUT not PTT OUT :-)
But you described common experience with this, I had the same with
VHF/UHF stuff connected to K3 - more complex system (as I have
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