the KPA500 in STBY mode
to bypass its PA)?
Just wondering if the issue arises in the KPA500 ALC feedback to the K3S
rather than directly in the K3S itself?
Mike, K8CN
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,
Mike, K8CN
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This list
, but these are the
folks that come to mind.
Mike, K8CN
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socket.
73,
Mike, K8CN
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Check here - options are half-deposit and full deposit.
https://elecraft.com/pages/k3-k3s-options
73,
Mike, K8CN
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Don,
I've observed that the rate of new posts has gone down (no scientific
estimate, just a gut sense based on daily checks of the forum). I have no
speculation as to why.
73,
Mike, K8CN
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es.
https://web.archive.org/web/20150905061319/http://www.elecraft.com/manual/K2_Rev_2_FW_Rev_J.pdf
I hope this helps a bit more....
Mike, K8CN
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Does this link get you there?
https://elecraft.com/pages/k2-mods-and-notes
I did not find a list of features incorporated in the various firmware
updates.
Mike, K8CN
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the signal path through D25. That choke failed open.
Mea culpa, and 73,
Mike, K8CN
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manual.
Mike, K8CN
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This list
failure
possibilities. The old thread is here:
http://elecraft.365791.n2.nabble.com/Elecraft-K3-problem-td7663573.html#a7663581
73,
Mike, K8CN
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F gremlins in your shack with a random
length wire without a counterpoise.
Mike, K8CN
(hoping to be back at NEAR-Fest next year!)
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Check your RX ANT settings to be sure that you haven't inadvertently selected
a non-existent RX antenna.
(see bottom paragraph of page 70 in the K3s User Manual).
Mike, K8CN
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are mounted, often just a few feet down
from the Yagi.
Mike, K8CN
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the years!
73,
Mike, K8CN
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of the LPA module bridged across the antenna signal path in RX
mode.
Keep us posted on what you learn!
73,
Mike, K8CN
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-Tore's issue.
Thanks, and 73,
Mike, K8CN
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or corroded TMP connector.
Mike, K8CN
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before going further back up
the signal processing chain.
73,
Mike, K8CN
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You might check the PIN diode T/R switch. The high attenuation in RX mode
and no output power even when the 100 W PA is bypassed suggest that one or
more of the PIN diodes in the T/R switch have failed "open."
Mike, K8CN
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of the filter capacitor. The DC bus
voltage reported by the K3 toggled between two values, 13.6 V and 12.7 V.
Motto of this story: even if an electrolytic doesn't appear bad externally,
suspect increased ESR and replace it.
73,
Mike, K8CN
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hand
in glove with the cable companies because the cable customers report TV,
internet and telephone interference that is traced to power line arc
generators making ingress to the cable network - both utilities find the
weak points in their respective systems.
Mike, K8CN
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display because the
HI CUR condition also reduces headphone audio substantially, which gets my
immediate attention.
Kudos to Mr. Opie for his uncanny sense of what might reveal a potential
cause of the spontaneous HI CUR warnings in receive mode.
73,
Mike, K8CN
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slightly greater than 13 watts
tells me the power control loop is getting different FWD power information
than what it expects to see.
Probing the SMD device leads to check that /FSCL is properly asserted when
you cross the 12 watt threshold? I'll leave that one to the pros!
73,
Mike, K8CN
large to fit into that space.
73,
Mike, K8CN
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connectors. I appreciate the guidance from those with better memories of
firmware revision notes!
73,
Mike, K8CN
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s puzzling - if there's a shorted audio channel, I would think it
would stay shorted unless my headphones have an intermittent short on one
side.
Thanks, too, to Joe, 4Z7JBA, for his offline suggestion of another potential
cause for the observed behavior in receive mode.
Mike, K8CN
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controls
Has anyone else seen the HI CURR warning displayed only in receive mode with
accompanying loss of receive signal strength? I've searched the archives
and found plenty of discussion about HI CURR warnings, but nothing quite
matches my K3's observed behavior in receive mode.
Mike
better CW contesting
experiences.
Mike, K8CN
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that you have a
recurring need for this set of tools.
It's likely that your local electric utility has a person trained in finding
arc noise sources, but they love it when you can identify the specific pole
on which you have found the likely source!
73,
Mike, K8CN
Durham NH
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Hi Don,
Does the slow recovery problem occur only on 20 meters, or is it present on
every band?
Does the problem still exist if you turn the AGC totally off?
73,
Mike, K8CN
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(http://w3fpr.com/) for a link to the free versions of
Spectrogram and tips on adjusting the K2 filter settings for different modes
and desired bandwidths.
73,
Mike, K8CN
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Lee,
Ed, W0YK, has a commentary on this very subject in the current issue of NCJ
(subscription required). Perhaps he will weigh in directly here, but his
recommendation was to use the normal filter rather than dual passband. This
is not an issue unique to the K3.
73,
Mike, K8CN
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the radiator
to 88 feet you'll be in better shape for 80 meters. Is your counterpoise on
the ground or elevated? Do you have additional coax to the radiator or just
run the wire directly to your KX1?
73,
Mike, K8CN
Durham NH
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?
Please clarify where you are in the overall test procedures for the K2.
Thanks, and 73,
Mike, K8CN
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to check for an actual physical disconnection on the RF
board.
I'm curious to know of your findings..
73,
Mike, K8CN
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.
QRZ.com maintains a forum devoted to hamfests, which is also searchable:
http://forums.qrz.com/forumdisplay.php?12-Hamfest-and-Convention-Calendar
Not all hamfest-sponsoring organizations list with one of the entities
noted, and there may be other lists of which I'm unaware.
73,
Mike, K8CN
feedback issues with your existing setup?
I've used 1N4148 diodes in my K2/10 computer keying line without problem for
several years, but that's only because I had an abundance of them in my
parts bin.
73,
Mike, K8CN
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Tom,
You're not the first to encounter this particular anomaly. Don, W3FPR had
these suggestions for another builder, the link to which I've included
below.
http://elecraft.365791.n2.nabble.com/K2-RF-Board-resistance-check-failure-U6-Pin-8-tt7559095.html#a7559102
73,
Mike, K8CN
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? The Lo P
message could be displayed if you accidentally placed the K2 into Test
mode, i.e. disabled the transmitter, then attempted to key the rig, but this
would also be apparent on other bands too.
73,
Mike, K8CN
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Those who've dealt with issues in USB to serial port conversion will
appreciate Bill Wong's commentary in Electronic Design:
http://electronicdesign.com/blog/s-obsolete-not
73,
Mike, K8CN
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I've tried accessing the FTP server for a firmware upgrade via the K3
Utility, Firefox, and IE, but no response. I checked my firewall settings
to be sure the FTP server is a trusted site, but still no connection. What
have I overlooked?
73,
Mike, K8CN
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Thanks for checking, Knut. I had used that URL. When I ping it, there's no
response here either. Guess I'll do more local diagnostics..
73,
Mike, K8CN
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help
file did mention a possible need to negotiate with the firewall in the
event of an FTP timeout, but I was originally thinking only of the firewall
on the host PC for the K3. Just wanted to report back in case others should
encounter a similar difficulty.
73,
Mike, K8CN
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, and 73,
Mike, K8CN
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Hi Christophe,
Your resistance values are fine. These control board resistance checks are
intended to reveal low resistance paths that should not be present (for
example, solder bridges), and your measured values are far from short
circuits!
Enjoy the building of your K2.
73,
Mike, K8CN
Hi Christophe,
The VCO shield kit may be found here:
http://www.elecraft.com/order_form_parts.htm#K2%20Parts
Look at the first line labeled K2VCOSHLDKT.
73,
Mike, K8CN
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-pole
filter). You shouldn't need to alter the Transmit Crystal Filter Selection
settings if you have already done this procedure with the stock 2.7 kHz
5-pole filter.
Enjoy the new filter!
73,
Mike, K8CN
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to exit
the configuration mode. Use PDLr if dot/dash sides are reversed from what
you expect. See page 99 of the K2's Rev. I manual for more detail. Hope
this helps!
73,
Mike, K8CN
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your dummy load is attached.
73,
Mike, K8CN
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environment you
should have no problem either way.
73,
Mike, K8CN
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environment you
should have no problem either way.
73,
Mike, K8CN
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archives. I ran my K2 very happily for 4 years after using only the
K2 manual's procedures for alignment, then re-did them last summer with
Spectrogram. I can't claim any dramatic performance improvements except that
I could see where the filter passbands were actually located.
73,
Mike, K8CN
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Hi Bartek,
Glad all worked out well with the re-alignment - enjoy your K2!
73,
Mike, K8CN
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on the air for the first time!
73,
Mike, K8CN
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MHz WWV signal) that you can't get the last 4 digits of the VCO and BFO
frequencies to agree when you adjust C22, which may stem from inadequate or
offset tuning ranges for either of these oscillators.
Let us know what you find!
73,
Mike, K8CN
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is the indicated current draw on the K2 display in each mode?
73,
Mike, K8CN
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as
directed in the K2 manual after re-assembly.
73, Mike K8CN
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-- if it's the KAT2
inside the K2, did you check to be sure that your antenna port selection in
the menu is for the connector to which the antenna is actually connected?
Do you notice a difference in audio signal levels on different bands or is
the audio output uniformly low on all bands?
73,
Mike
suggestions based on his extensive knowledge of common K2
maladies.
73,
Mike, K8CN
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If anyone has a surplus K160RX module for the K2 that you're willing to sell,
please contact me privately at K8CN (at) arrl (dot) net. Thanks!
Mike, K8CN
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to it would be
acceptable (presuming you can extract the spacer after the backlight pins
are soldered :) ). Don, W3FPR may have a better suggestion.
73,
Mike, K8CN
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with at least two
different sources of interference.
73, and good luck!
Mike, K8CN
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The link from the Elecraft reflector page appears to be broken. I went to
Nabble directly and clicked on the Elecraft link there, and the reflector
came up correctly.
Mike, K8CN
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in
the Error 500 response from Nabble.
Mike, K8CN
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was
14 or 15 and pretty naive about lightning-induced currents), but I still
disconnect feedlines (and ground them!) religiously.
Mike, K8CN
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I'll add hearty congratulations as well. L33 is indeed the tricky part
(don't ask me how I know, but Don's advice to re-heat suspicious solder
joints comes to mind) and you've done well to leap this hurdle. You'll be
golden from here on!
73,
Mike K8CN
lstavenhagen wrote:
Again, I didn't
John,
I, too, suffered this apparent loss of access to Nabble2 without any changes
locally. I found that I only needed to click on the Elecraft link on the
upper left corner to bring out the full forum listing.
73,
Mike, K8CN
Durham, NH
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Steve,
If memory serves me correctly, L33 (the BFO coil on the underside of the
main RF board)
has very little clearance to the bottom cover, and I found the same mild
detuning when
pressing on the bottom cover.
Mike, K8CN
K2/10 #5569
Steve Kallal wrote:
I was trying to calibrate
of the on-air experience -- I kept calling, refined my timing of calls
in pileups, and tried the trick of calling slightly off frequency from the
previous station who worked the entity I was chasing. Eventually the log
filled up..
73,
Mike, K8CN
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Hi David,
This was a CW-only endeavor. Once I get the KSB2 module installed, I will
try
my hand at digital mode QRP DXCC.
Thanks,
Mike, K8CN
What modes?
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and opt for QRO!
Cheers, and a spot of bubbly to all,
Mike, K8CN
Durham, NH
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Had to share the elation: snagged FO/OH1RX on 80 M CW at gray line this
morning -- K2 running 5 W to 135 foot doublet, window line feed, at 50 feet.
Mike, K8CN
K2 #5569
New Hampshire
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