Hi
I have a Elecraft K 3 full option.
When I have 2 meter in sub band and I active it the rig say use aux and
no rx.
How can fix it ?
73 de ik4olq
Andrea Abati
Cell 333 4551059
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Hi Andrea,
this posting from W2ZK (from the archives) gives the answer I hope...
73, Win DK9IP
If the two receivers are sharing the main
antenna path, putting the sub receiver on a
higher-frequency band than main may result in
signal loss in the sub. This is due to sharing of the
main
I am about to purchase a K3 (k). My main interest is certainly CW with
occasional forays into SSB and even data, and I note the selection of roofing
filters available, no doubt the 8-pole are somewhat better but what is the
general feeling regarding the bandwidth(s) to be included.
Ivan G3IZD
Ivan
You'll get as many different views here as there are combinations of
different filters !
Roofing filters are quite easy to add at a later date (ease depends somewhat
on the options installed), so my suggestion is to go lightly at first and
see how you get on with just a couple of filters,
Hi Ivan
I use Inrad
SSB Wide 2.8khz #716
SSB Narrow 1.5Khz #727
CW / Data 400hz #701
I find these filters outstanding in all conditions and I contest in SSB CW
RTTY and PSK31
Jim M0CKE
On 6 August 2013 10:50, James Balls makid...@gmail.com wrote:
Hi Ivan
I use Inrad
SSB Wide 2.8khz #716
Hello Nick,
I would like to do similar test for my K3 and KX3. Could you please advise how
I can do that?
TNX 73,
Johnny VR2XMC
寄件人︰ Nicklas Johnson n...@n6ol.us
收件人︰ elecraft elecraft@mailman.qth.net
傳送日期︰ 2013年08月6日 (週二) 1:30 PM
主題︰ [Elecraft] KX3 12kHz audio spike
While doing some
Thanks for the new code, Fred. It also works in the UK Lulu bookstore so
ARDENS20 may be a fully international discount code.
It makes a nice sweetener for a couple of books I've had my eye on.
By the way, there's a potentially useful freebie available: Amateur Radio
Callsign Prefixes by
On Tuesday August 6, Ivan (G3IZD) wrote ...
I am about to purchase a K3 ... what is the general feeling regarding
[filter] bandwidth(s) ...
--
Hi Ivan,
In addition to the choices available from Elecraft and INRAD, WB2ART
and I also offer a 700 Hz (wide CW) alternative. IMHO 700 Hz fits
Ivan,
You are right to ask, the filters can drive the cost of the K3 spiraling
upward.
I will not answer simply, but rather give you some guidelines for selection.
Your choice of roofing filters will depend a lot on your operating
conditions and preferences.
Remember that the roofing filters
Hi Ivan,
I am a CW guy and agree with John's assessment on the number of answers you
will receive!
Here's mine: I run 250Hz, 400Hz, 1000Hz, and 2.8Khz. I know folks out there
will say that the 250 400 are so close in filter shape when you really take a
look at things, that they are somewhat
Arno,
Sure someone from Elecraft will respond with a technical
explanation...sounds a bit like default behaviour to me and also shows
there is a difference in the battery and the internal PA voltage and you
are maybe close to the fold back voltage.
If the supply voltage drops below 12V (I
I have found that with even a freshly charged 7Ah battery that the power
folds back, on some bands especially, even if the internal atu has found a
good match. However, in almost all cases setting the power output to 8W
rather than initially 10W it doesn't happen as much, at least not until the
This is most likely power supply ripple from the variable loading of the
DSP, which occurs at a 12 kHz rate.
You may be able to reduce it by setting MENU:RX ISO to ON. This
increases average current in part by preventing the DSP from sleeping
between tasks, thus smoothing out some of the
I know many users are happy with the 700 Hz roofing filter you guys have had
custom-made. However, I am wondering just how helpful it actually is,
compared to other, more standard roofing filter BWs. If a 700 Hz bandwidth
is ideal for scanning, just how is a roofing filter needed when scanning?
By
Hello Lyle,
I really like your last sentence. I can still hear somewhere around 12Khz or
higher. This hearing ability is good for Hifi audio but bad for listening to
radio. My ears are very sensitive to DSP artifacts. This is the reason why I
found the DSP board upgrade for earlier
Hi Ivan,
250 Hz: CW and some data modes
1.8 KHz: Other data modes (MT63, WL2K) and SSB Narrow
2.8 KHz: Normal SSB
6.0 KHz: SWL (AM and DSB) and 80m AM nets
15.0 KHz: FM on 10m and 6m
The 250 Hz roofing filter works extremely well in crowded band
conditions on CW. It's also just about right
Unlike many other transceivers, ultimate selectivity in the K3 is not
determined by the crystal filter. Ultimate selectivity is determined
by the DSP whilst the roofing filter only impacts narrow band dynamic
range (the level of close in signals applied to the second mixer and
analog to digital
Ivan, you wrote:
I am about to purchase a K3 (k). My main interest is certainly CW with
occasional
forays into SSB and even data, and I note the selection of roofing
filters available,
no doubt the 8-pole are somewhat better but what is the general
feeling regarding the
bandwidth(s) to be
Lyle: I gave setting RX ISO to ON a try, and though I can see some small
changes in the spectrum analyzer, it doesn't seem to change the 12 kHz
spike or its harmonics.
Granted, my hearing is abnormally good for my age. I can still hear up to
about 18 kHz, which is pretty unusual for an
Mint K3/100, s/n 4935. Little use. No 2nd rx or tuner. Options: TCXO, KXV3A,
KFL3A-200 and 500.
$2200.00 shipped FedEx ground.
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Help:
I've been doing some performance comparison between two antennas I am
using. I'm compiling data of my WSPR transmissions and spots over
periods of many hours. I got a little carried away and made up a
spreadsheet to compare reciprocal signal reports as well as the
performance differences between
My 2 cents worth:
Since you are primarily a cw operator, you may now or in the future want
the roofing filter that is the ultimate in protecting the DSP in the
toughest possible conditions such as when you are running big antennas
in a contest on the lower bands. This would mean a very narrow
Here is a link that may answer part of the question:
http://batchloaf.wordpress.com/2013/02/12/simple-trick-for-sending-characters-to-a-serial-port-in-windows/
His simple method of doing echo hello or your command string to
com1 would probably work. You could then make that a batch file to
Get a mechanical timer, one that has the pegs in a wheel to set on and off
times to control a lamp etc. Set up an antenna relay that connects one
antenna when power is on, and the other when off.
73 - Mike WA8BXN
---Original Message---
From: drewko
Date: 8/6/2013
Wayne,
I can't confirm a low Z as I don't have an analyzer. If this helps to guess:
I was using the ZS6BKW version of the G5RV, with 70' of coax connected to
the window line from the doublet and no matching network between that
connection.
The ATU was able to achieve a 1.0:1 SWR. RX was
Monte Sano BBQ and Buildathon Event:
Per Two Days in Huntsville (TDiH) tradition, another mountaintop QRP
gathering, complete with Southern BBQ and special QRP events, will occur in
Monte Sano State Park Saturday evening, 8/17/13.
This year, we will do a Buildathon as our
Excellent answer from Don, W3FPR.
I fit the mostly SSB type with sub-Rx, so I use diversity
reception. I chose for the main Rx:
13-KHz (for AM and FM)
2.8-KHz
400-Hz
The sub-Rx has just the 2.8-KHz filter
I chose the 8-pole for ease in set up for diversity Rx and for the
steeper skirts
Monte Sano BBQ and Buildathon Event:Per Two Days in Huntsville (TDiH)
tradition, another mountaintop QRP gathering, complete with Southern BBQ and
special QRP event, will occur in Monte Sano State Park Saturday evening,
8/17/13.
This year, we will do a Buildathon as our special QRP event!
Brian,
Yes, I want to send the ANT 1/2 switch command to the K3, say every
quarter hour. I believe there is no serial port rig control from the
WSPR software to contend with, just the tones from the soundcard that
key the rig periodically.
So, I just need a utility to send the ant switch
Ray,
Thanks! That's what I had in mind... I believe it is the AT command
(not ON). Also, SCHTASKS perhaps...
73,
Drew
AF2Z
On Tue, 06 Aug 2013 12:52:57 -0500, you wrote:
Here is a link that may answer part of the question:
Nick,
I think Lyle meant to type RX I/Q, not RX ISO. Turning on the RX I/Q
outputs (which is accompanied by the DSP load leveling) will reduce the
12 kHz spur by 15 to 20 dB typically. Doing this also increases overall
supply current by about 10 mA.
When looking at these spurs on an audio
From the operating you plan, and having operated many different K-3s,
for
SSB CW I would suggest:
1. The standard 2.7 KHz filter for occasional SSB. As others have
mentioned, the roofing filter is to protect the DSP.
2. A 400 Hz, 8-pole (or 500 Hz-8 pole) filter for general CW operation
(I
On 8/6/2013 5:51 AM, Lyle Johnson wrote:
It is always best to use headphones or external speakers that have
limited response above 5 kHz with the KX3. The radio will not pass
audio information above this frequency, so the only thing wide
response headphones or speakers will provide is
Ahh, that's why I love this reflector. One always has a chance to learn
new technical terms
On 8/6/2013 12:46 PM, Jim Brown wrote:
Horsepucky. . . . . .
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I have a the Altec Lansing BX1221 speakers for an external speaker
system for my K3 / KX3. I really like them and they are very RF
friendly in my environment.
The one thing about them I don't like is the power switch is in the
back. Has anyone modded theirs to put the power switch somewhere
I did, copied both files to a directory I named KAT500fw0141...pointed to
it, works fine, looks like the ones the zip versions did.
-
Chuck, KE9UW
--
View this message in context:
http://elecraft.365791.n2.nabble.com/KAT500-production-firmware-version-updated-to-1-41-tp7577412p7577461.html
I have made the difficult decision of parting with my factory assembled K3 S/N
6061. I have very little time for ham radio right now due to family
commitments, and most of my ham radio time is spent operating my KX3. K3 has
hardly been used since I bought it in December 2011 (especially after
So I finally accepted the fact that my hearing isn't what it used to be. I got
my hearing tested and hearing aids are in order. No simple hearing aids for me,
though. I want the high-tech ones with multiple programs for different
environments. I'm interested in how others with hearing aids
I've finally accepted the fact that I'm damn near deaf, way too many
close explosions in my 20's. My hearing aids work really great.
Unfortunately, unless you're a US Veteran, they're going to be costly.
Mine are about $6K a pair, and they have multiple programs, when they
sense music they
Ray,
Tks again for the idea. I now have the batch files set up to switch
the K3's ANT every hour, half-hour or 15 mts while WSPR is running.;
no other software needed.
My only question is: what happens if the K3 receives a serial command
to switch ANT while it is transmitting? I assume the
Don,
No adjustment to the K3 should be necessary. Your audiologist should
adjust your hearing aids to compensate for your hearing loss, and after
that is done, you can adjust the K3 RX EQ for your personal preferences.
I have a program in my aids that has no noise reduction, and expands my
That is absolutely a real effect. Back in the mid-70's I was a product
engineer responsible trying to sell tuning diodes to the TV tuner
industry. UHF tuners in the U.S. back then were still almost all
mechanical, and even though the rest of the world had pretty much
already converted to
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