What specific shortfalls in SDR applications that don't have images lead
you to conclude they are inferior to the P3?
Also, keep in mind that SDR is not completely defined by
soundcard-based configurations. Have you considered other
computer-based SDR front ends like SDR-IQ or QSR-1 before
Hi everyone,
This is just a reminder of our up and coming VK4XQA operation on 160M 80M
that is scheduled for 19/20/21 November 2011 from Euramo, QLD, Australia.
All systems are go here, the antenna is ready, the rigs and amplifiers are
ready, now we wait until we can all congregate at the
This is the first semi-official news we have received on the KAT500 in some
time. Originally, I believe a design target was the same size as the P3, not
the K3 or KPA500. I wonder if the new case dimensions actually contain a
larger volume than the P3 box? A low-profile design with the same
A while back I posted with my long term problem with 2 year old K3 with VFO A
tuning freezing or becoming intermittent. Dale and Wayne at Elecraft replied
that it could be a bad VFO A optical encoder, since I had tried all the
other suggested fixes.
They mailed the encoder, it arrived Saturday
Thanks for the news about the KAT500. But it says in the KPA500 Owner's
Manual (yes, I do read manuals!):
IMPORTANT: Provide at least 2 inches (5 cm) clearance behind the fan and
above the amplifier for proper air flow.
This may hold true – to a lesser extent – for the K3...
How come the KAT500
test sri
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http://www.youtube.com/watch?v=rkApRg5VWnc
This is a video of converting a PC power supply for ham use.
73
John
AB8O
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KX-1 # 1593 w/ tuner, 80/30 m, attached paddle. Pls contact off list:
k6mr(at)pacbell.net.
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Does installing the internal 20 watt internal antenna tuner in the KX-3
cause a problem later if you opt for the 100 watt amp and higher powered
ant. tuner? Will you be able to bypass the 20 watt tuner via a menu setting
for any QRP work? Has this been discussed before? Thanks.
Bob Wilderman,
A while back, I suggested a feature that could be toggled that would
allow the NR and NB dial to adjust like this: 1-2, 2-1, 3-1, 4-1,
1-2, 2-2, 3-2, 4-2, etc.
After constant use of the NR NB features, I still think I would
prefer this proposed arrangement. Perhaps it will make it on the list
I agree with all Ian's comments except:
Almost any ani-static mat and wrist strap will be OK
My testing has shown that not all anti-static mats are created equal.
In particular, the Radio Shack portable mat P/N 276-2370 has much too
high a resistance to be effective. Here is my previous
Richard,
SDR is essentially a direct conversion radio, so it is much simpler than
conventional heterodyne radio. If you want to use SDR_IF you will need
something like additional SDR, like S oftRock to convert K3 IF signal to I/Q
signals. I have this setup and it works fine, without any
On Nov 14, 2011, at 9:47 AM, Linda and Bob wrote:
Does installing the internal 20 watt internal antenna tuner in the
KX-3
cause a problem later if you opt for the 100 watt amp and higher
powered
ant. tuner?
The external high-power tuner will be sensed automatically. The
internal ATU
Am I the only one who find it difficult to use the Noise Blanker and Noise
Reduction controls on the K3? Maybe it can't be improved but it sure doesn't
work as well as the Ft5000. In my noisy location it sure would be nice if
these two features on the K3 could be improved. 73, W0SZ
Well Dave, maybe I am missing something here, but this thread has been
about the anticipated KX3 and having a Pan-Adapter to use with it. As I
understand
it, the I/Q leads are being brought out, but not the IF. So other SDR
receivers, or adapters, are not
needed. Therefore, we are down to
The thread title didn't say anything about being restricted to the KX3,
and your comment simply stated that you were giving up on SDR in general
... hence my comment. Whatever rig you've been having your problems
with (I assume a K3), it certainly wasn't a KX3.
I'm curious which programs you
Just spoke to VK4FW at T2T. One of their K3's works on CW but has died
on SSB. Bill says they disconnected all cables, set all settings to
match another K3 that is working on SSB, checked the microphone routing
on the Main Menu and of course swapped out headsets. No joy. They are
frantic to
With the KAT3, is the AUTO/BYPASS selection specific to ANT1/ANT2, or
does it apply the same setting to both ANT1 ANT2?
73, Ross N4RP
--
FCC Section 97.313(a) “At all times, an amateur station must use the minimum
transmitter power necessary to carry out the desired communications.”
I called them and worked them but was unable to make a suggestion to them that
they
download the same configuration file as used by the other K3, and re-start it.
Maybe
they have already tried this, I don't know.
VY 73, Lance
On 11/14/2011 8:27 PM, Garry Shapiro wrote:
Just spoke to VK4FW
David
Space diversity with the K3 is an interesting idea.
A variable phase shift could be achieved by adding the raw audio from
main rx to a 90degree phase shifted version of itself. Adjusting the
relative amplitude of the 90deg version will then vary the resultant phase.
Is a phase shift at
K3 #3547 has developed a buzz on receive and transmit. It will very in
rapidity by varying the supply voltage from a high, 14.1 volts (fast buzz),
down to 12.4 volts, as low as I can go on a fresh 12 volt battery supply
(slower buzz). It still receives audio transmissions and I have been told it
From the manual:
If you do have a KAT3 installed, you can connect antennas to both ANT1 and
ANT2; tap ANT to select. Holding ATU selects AUTO (autotune enabled) or
BYPASS mode. In AUTO mode (ATU icon on), the antenna can be matched for best
SWR by tapping ATU TUNE . Up to 30 ATU settings are
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I just confirmed this by setting ATU AUTO on ANT1 and noting that ANT2 was
still set to BYPASS.
/Rick
On Mon, Nov 14, 2011 at 12:39 PM, Shane DeSeranno ty...@syntheticstream.com
wrote:
That said, if I remember correctly, it's per antenna. So if I set to
BYPASS
on ANT1, then switch to ANT2
Thanks to all who responded, that's how I need it to work. That's not
specified in the manual.
Now, if only VOX was mode specific ;-)
73, Ross N4RP
On 11/14/2011 3:43 PM, Rick Tavan N6XI wrote:
I just confirmed this by setting ATU AUTO on ANT1 and noting that ANT2
was still set to BYPASS.
Hi Allen,
Are you running a battery charger in parallel with the battery while
operating? That can frequently cause buzz. You might try it with the
charger off-line if so.
While anything is possible, its pretty difficult for the radio itself to
create the buzz you are hearing in RX and TX. If
Garry,
I am not at home right. Using another radio's config file will probably
not work as the calibrations would be different between the two rigs.
If you can get them on the air or by email I would suggest doing the EEINIT
process and then redo the calibrations outlined in the manual (watt
If they are using a condenser mic, make sure the mic boas is turned on.
73, Eric
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On 11/14/2011 1:02 PM, Greg wrote:
Garry,
I am not at home right. Using another radio's config file will probably
not work as the calibrations would be different between the two rigs.
bias...
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On 11/14/2011 1:07 PM, Eric Swartz - WA6HHQ, Elecraft wrote:
If they are using a condenser mic, make sure the mic boas is turned on.
73, Eric
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As a potential future buyer of the KPA500, I have a few questions, for those
who actually own it:
What have you found to be the actual output power, on a dummy load using a good
power meter other than the internal one.
Is the maximum output the same on all modes (CW/AM/FM etc.)?
Is the
Hi,
Lots of people, including myself are using NaP3 with the K3. I haven't seen
an image for a very long time. The automatic image rejection algorithm is
perhaps a little moody if there are next to no signals, which certainly
hasn't been the case recently where it is the most useful, on 10m. The
See answers below
Mike W0MU
J6M CQ WW DX CW Contest 2011
J6/W0MU November 21 - December 1 2011
W0MU-1 CC Cluster w0mu.net
On 11/14/2011 2:15 PM, Sebastian, W4AS wrote:
As a potential future buyer of the KPA500, I have a few questions, for those
who actually own it:
What have you found to
Sorry for any duplication as I posted this in another place too.
My K3 arrived (well, I went and got it at UPS this morning). I took the
day off and figured I'd take a good lick at assembly. Counting the
inventory, I've been at it about six hours and everything is going well
except for the
Bob, Eric et al,
I just QSO'd T2T on 10 SSB--12 had indeed gone out. They fixed the
radio, but it was not a settings issue. They reported that the radio was
not recognizing the filters! They physically removed and reinstalled,
they say, and now the radio is normal. New one on me! All is now
Joel,
I'm sure you get a lot of comments with uses for the 2nd receiver. Here's a
couple I can think of that might be of interest to you.
Since you like JT65 how about running two incidents of the software and
monitoring the JT65 frequencies on two different bands. If you see something
you
Regarding the value of diversity reception, I cannot speak for digital modes,
but it
definitely improves my ability to copy CW, particularly on the bands below 20
meters,
where I don't have a beam. I use vertical and horizontal antennas for
polarization
diversity. Not only does it reduce
On 11/14/2011 1:15 PM, Sebastian, W4AS wrote:
What have you found to be the actual output power, on a dummy load
using a good power meter other than the internal one.
Same as what the LED's say when the highest one just comes on.
Is the maximum output the same on all modes (CW/AM/FM etc.)?
On 11/14/2011 12:51 PM, Eric Swartz - WA6HHQ, Elecraft wrote:
Are you running a battery charger in parallel with the battery while
operating? That can frequently cause buzz. You might try it with the
charger off-line if so.
While anything is possible, its pretty difficult for the radio itself
Hi Sebastian:
The actual (maximum) output power is 500 watts on all bands as measured on
a calibrated external wattmeter. I don't operate all knobs right so I
haven't pushed it to the limit. (BTW, the internal meter is quite good.)
The power output does not depend upon mode. It'll run 500 watts,
I am a contester but do all sorts of operating. I have two K3's,
initially I only had the 2nd receiver in the unit that I designated the
main radio. This radio also has lots of filters etc. I took the main
K3 to my Montana home for the summer and ended
Answers in - line for you Sebastian.
73 de
Jeff Cochrane - VK4BOF
East Innisfail
QLD, Australia
K3 #4257, P3#1629, KPA-500 #161
- Original Message -
From: Sebastian, W4AS
To: elecraft@mailman.qth.net
Sent: Tuesday, November 15, 2011 7:15 AM
Subject: [Elecraft] KPA500
And one last suggestion if you haven't already removed the screw... if you
have the outer edges of the screw head intact as your screw driver was
undersized then go with a new screw driver of a larger size and that could
also solve the problem. I read all the other suggestions... wow, everything
The EFHW looks pretty similar in terms of matching on the full wave
frequency (EFFW?) too. That is, it's purely resistive and a couple
thousand ohms. Actually a little lower on the higher band but not
much. I use the same matcher for both bands. So it's a good dual band
antenna.
My field
I just put my KAP500 on a dummy load to set the drive power for all bands,
started at 160 and worked up to 6.
when I was done and before I removed the dummy load I saw spikes every 9.5
khz all across the P3.
they are about 7dbm above the noise floor of the K3 when on the dummy load,
turn off the
I'd like to add a similar suggestion, this one about the APF in the K3. I
accept that it works as intended, but it is not useful. I've used APFs for
many years and they can be very useful. The need to severely narrow the
bandwith to avoid ringing and the poor peak in the audio when the APF
Thanks for the comments on my questions on the KPA500 amp.
To expand on some of the comments: I have no reason to believe the amp's meter
isn't accurate. Since I haven't seen one yet, it appears to me the meter is of
the LED type, which for me is a bit difficult to read. I find it easier to
I just did a calibration check on the P3 and it was right on using the XG3 at
-107 DBM
with the K3 connected to a dummy load my measured noise floor is -133 DBM (
hard to get close as it is fuzzy) the strength of the birdies is at
- 125 DBM.
they seem to have peaks every 140 KHZ up
Hi Tony,
I use APF constantly and find that it makes weak signals buried in
noise far more readable. That is its purpose. The center frequency is
tunable in 5-Hz steps, but we feel that the narrow bandwidth at peak
is critical to its success, so we haven't tried making the bandwidth
I asked this question because in the past I have found the rated output
power of a transistorized amplifier is often higher than what is actually
obtained.
Sebastian, you'll find that Elecraft meets their published specs. I've had
the pleasure of working with them for the past 11 years and I know
I don't think you can over drive it as there is a overdrive fault and
output leds change color to let you know how much power you are putting
out. Mine is packed for J6 so I don't recall if it is green, yellow,
red. I set the radio output so the amp puts out 500w. An extra 100
watts
I just finished up with the calibration of the new K3.
First, after all the emails and web searches, I decided to keep the
KRX3. I am looking forward to using it.
Took about 8 - 10 hours to get to the calibration / testing phase.
Audio is excellent. I have my FT-857 on a switch with the K3.
Dear Pete,
The parcel arrived yersteday in good condition. I'll connect the P3 with my
K3 on Friday because my whole station ist in my countryside house in
Burgundy.
Thanks again and 73
Luc
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Hi,
Sri for the bandwidth, last msg was a private one...
Luc/F6HJO
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