There are still a handful of 700 Hz (wide-CW) filters available from
the third production run. We cannot say how long it will be before
they are all spoken for; it might be a couple of weeks, or it might
might be a couple of months.
Delivery is expected in early March, although most likely the
Our K2 Headers kits have been selling twice as fast as we expected
since Ken and I produced another batch earlier this year. Whereas we
initially thought we had enough to last through 2015, at this rate
they'll be gone closer to the end of 2013!
For the moment there's no quantity limit, but as
It has been sold. Thank you for asking. 73AlanW1HYV
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Post:
Jay,
The K3 protects itself against too high SWR's by cutting back power.
An SWR of 1.8:1 is quite acceptable.
As to why the SWR is 1.8 , there could be many reasons.
1) Antenna too long or too short. Run an SWR curve vs frequency to see
which.
2) Antenna height. Depending upon height the
From what I read in the manual, although it would be difficult to satisfy in
every way all the non-Elecraft amps, there are some thoughtful safeguards
built into the KAT500 which should help. One that comes to mind is that it
doesn't drop the key line if the power is over a certain amount (29
From what I read in the manual, although it would be difficult to satisfy in
every way all the non-Elecraft amps, there are some thoughtful safeguards
built into the KAT500 which should help. One that comes to mind is that it
doesn't drop the key line if the power is over a certain amount (29
Hi,
Wouldn't all this work much better if the K3 did not key the amp when
invoking the tune function? I don't have the KPA500 (yet) but the bypass
function is not an option for me since my KAT500 is located remotely at the
antenna site. This is working fabulously now that it has learned my
Hi,
I might try a delta loop in the spring. CNY weather is not conducive to
antenna work riight now. I have now hooked up two more antennas, resonant
dipoles for 10 and 15m. I am happy as a blast that I got the remote KAT500
installed before winter. The rollout of the KAT500 has been surprisingly
I don't think you quite got what he meant. There is some confusion as to
whether the KEY OUT line is active when the TUNE button is pushed on the K3.
Sorry if I got it wrong, but some folks think that it would be advantageous if
there were no key line output when pushing TUNE on the K3. Their
It is perfectly safe.
The K3 cuts back power when it sees the equivalent reflected power of a 2:1 SWR at 100
watts. So it will operate normally at a 1.8:1 SWR. If the LOWEST SWR is 1.8:1, then it
probably exceeds 2:1 somewhere in the band, where you will not be able to get a full 100
watts.
IMHO adapting amplifier to work with KAT500 is not the right way of doing it
because KAT500 is supposed to work with many different amps of 600 watt
class.
Yes, PTT is generated by the radio and then passed to KAT500. KAT500 should
generate it's own PTT signal for PA based on it's own KAT500
This whole issue has been solved by VHF/UHF stations a long time ago.
They use a sequencer to key and unkey various components with
appropriate delays to prevent damage.
They can be built or bought fairly cheaply.
Yes it would be desirable to have the sequencing be automatic. One
size is
Brian,
I fully agree that external sequencer could solve some of the issues
discussed. Still I have couple of notes.
1)Sequencers are not designed to work with automatic ATUs because the amount
of time required for ATU to reach tuned status is not known forehead.
Therefore PTT signal to PA
Professionally built by N4TVC, Condition is excellent, non-smoking. My only
reason for selling is my renewed interest in satellite operation and for that I
need a second HF thru 440 radio (i.e. FT-817ND, FT-897) to use with my home
brew full duplex controller. I am pretty firm at $1150 but will
Hi,
Pressing TUNE first will indeed open the Amp key, at least that's what the
utility is telling me. See here:
http://ab2tc.getmyip.com/tune_without_power.png
Not sure what the attenuator checkbox means.
AB2TC - Knut
ke9uw wrote
I don't think you quite got what he meant. There is some
Hi all,
I'm trying to control my KAT500 via the KXUSB cable to my MacBook Pro
running Mountain Lion. The only two ports I see are Bluetooth-PDA-Sync
and Bluetooth-Modem. The first gets KAT500 is not responding error
message from the KAT Utility. The second gets a Unable to open serial
port error
I posted a question a few days earlier about the KX3 and this particular
problem...thanks to those of you who responded. I was asked to post the
solution, so:
The issue was sending CW using VOX or MOX, the key-up signal was strong
locally. I measured this with a spectrum analyzer at about 60
Don,
It sounds like the FTDI driver is not installed on your MacBook.
You need to download and install the latest driver for Mac OS X (V 2.2.18).
http://www.ftdichip.com/Drivers/VCP.htm
David, W4SMT
From: Don Putnick don.putnick.n...@gmail.com
To: elecraft
The simple solution is to put the amp in standby, or push tune on the KAT
first, and then tune on the K3. I take it if you push tune first on the
KAT, then it will open the key line first so that the subsequent pushing
of tune on the K3 won't key the amp.
Chuck, KE9UW
Lionel Trains, TCA,
I have been using my K1 mobile for about a year and a half now, and am
noticing
that the 3 main controls - volume, RIT/XIT, and the main tuning control are now
fairly loose and wiggle about a bit when I am operating them. They don't seem
to
be moving together like the circuit board that they
The shafts on those controls can become worn where the shaft exits the
body of the control, and that will allow an excessive amount of 'wobble'
in the shaft and knob. The solution is to replace the controls. The
VFO pot was improved a year or so ago, so if you have to older one with
the blue
_
From: dx...@yahoogroups.com [mailto:dx...@yahoogroups.com] On Behalf Of Dave
AA6YQ
Sent: Sunday, December 09, 2012 13:08
To: dx...@yahoogroups.com; digitalra...@yahoogroups.com;
hamlog...@yahoogroups.com; dx...@yahoogroups.com; aru...@yahoogroups.com;
flexra...@yahoogroups.com;
You can use the Utility program to change that power limit so the KPA500
will open the key line at higher powers. See Amplifier Key Interrupt Power
in your Owner's manual.
73, Ron AC7AC
-Original Message-
From what I read in the manual, although it would be difficult to
satisfy in
On 12/8/2012 7:57 PM, Ron D'Eau Claire wrote:
Well, putting the KAT3 in operation will correct' whatever is causing the
high VSWR in the KPA500 by providing a conjugate match, but when the KPA500
is in Standby it passes the K3 output through to the KAT500. Now the input
to the KAT500 is no
Randy,
I'm not sure if it's normal or not, but I do find that if you use an
analyzer on the input of the KPA500 and a 50ohm dummy load on the
output, you will see a good 50 ohm 1.0:1 SWR on the analyzer in the
Stand by mode. However, when you put the amp into the Operate mode you
get
Well Elecrafters I am getting impatient (in a good way not bad) waiting for my
back ordered KXBC3 charger and KXPD3 keyer. The serial number of my KX3 is
1990how close am I to a Christmas gift of my last remaining items?? To be
honest it is disheartening to read of new orders shipping and
I am constructing the KPA 100 and have just fitted L16 and RFC1 (both blue
cores wound with 37 turns of 26 gauge wire). I am having difficulty getting
the two toroids to sit securely on the PCB because the leads do not align with
the holes in the PCB so preventing the toroids from being pulled
I put my K3 on 20M and put out 20 watts into the KPA500 in operate connected to
a Bird dummy load and the K3 shows 1:1 SWR.
Chuck, KE9UW
Lionel Trains, TCA, LCCA, LRRC
aka Jack, BMW Motorcycles BMWMOA #224
From: elecraft-boun...@mailman.qth.net
Hi All,
I've noticed an odd behavior on my K3. From the time power is applied,
the TX light begins to flutter on and off in a random manner. When it's on,
the K3 transmits, this in CW mode. It doesn't matter which band is selected.
I've just recently installed firmware version 4.60, but
Ray -
Is it possible that the toroids are wound the wrong direction? Check
the assembly illustrations carefully. It makes a difference whether the
winding starts in a clockwise or counter-clockwise manner as to
whether or not the leads line up with the solder holes in the PC board.
Use of
Hi all,
The contest isn't quite over, but the onset of full darkness in CNY has
pretty well closed the band for the day.
I started the contest Friday night with just a G5RV connected to the tuner.
I added two more antennas, resonant dipoles for 10 and 15m Saturday morning.
Once the tuner learned
Fred,
You logic is correct *except* for 2 things.
First, the KAT3 BYPASS switches in elements to make the output 50 ohms.
That compensates for residual reactance in the tuner itself (relay paths
etc.) - so it is not a direct path from in to out.
Secondly, the K3 SWR indication is at the
Well Elecrafters I am getting impatient (in a good way not bad) waiting
for my back ordered KXBC3 charger and KXPD3 keyer. The serial number of
my KX3 is 1990how close am I to a Christmas gift of my last
remaining items?? To be honest it is disheartening to read of new orders
shipping
Ray,
I have only once found a toroid with a broken wire, and I suspect the
builder nicked the wire when he was stripping the leads.
Yes, those 2 inductors have the holes in line with the silkscreen shape
of the inductor. There is no good reason why the cores have to align
with the
Sri Fred. I stumble around over all the K's, A's, P's et cetera myself. It's
most maddening when I do it writing a manual :-)
RISING INPUT SWR TO KPA500:
The fact that the SWR into the KPA500 rises with time is puzzling. That
surely suggests something is changing as it heats up.
However, from
Today at the end of the ARRL 10 meter contest, the real time clock in the
KX3 rolled over from 23:59:59 to 24:00:00 and kept going.
I turned off the radio and it came back up at 00:02:xx
???
73 - Jim K8MR
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Elecraft mailing
Hi, Ray ... the top picture in my construction blog posting on building the
KPA 100
(you can find it at
http://build-k2.blogspot.com/2011/01/kpa100-completed.html)
may be of some help. You can see that neither L16 nor RFC1 line up with
the
silk screen particularly well, but the leads lined up
That's gotta be the wierdest rubber clocking I've ever heard of in 44+ years
of ham radio. :-)
Just don't tell the contest committee!
From: jimk...@aol.com jimk...@aol.com
To: elecraft@mailman.qth.net
Sent: Sunday, December 9, 2012 7:28 PM
Subject: [Elecraft]
WELL, I SOLVED THE FAN NOISE ON MY KPA500. HAVING HAD SOLID STATE AMPS IN THE
PAST I LIKE TO RUN THE FAN AT THE LOW NUMBER ONE SPEED. I'VE BEEN BUGGED ABOUT
SOME FAN NOISE WHICH I'M SURE WOULDN'T BOTHER OTHERS BUT DID ME. I WENT TO
RADIO SHACK AND GOT A PACK OF GROMMETS. I USED THE SMALL
It's 26 O'clock and all is well.
On 12/9/2012 6:25 PM, Bayard Coolidge wrote:
That's gotta be the wierdest rubber clocking I've ever heard of in 44+ years
of ham radio. :-)
Just don't tell the contest committee!
From: jimk...@aol.com jimk...@aol.com
To:
Need to sell my K3/100, serial number 6383, purchased kit in 3/2012 - has the
ATU kit installed, 440hz 8-pole filter, 2.1 kHz 8-pole roofing filter, and I
also have the universal Serial Bus Adapter cable. New this cost over $2600.
It is in perfect condition, with no marks of any kind -
No it is not with the KAT500, it is with the 8 other outboard tuners I have.
My KAT500 is not radio controlled but is just connected with RF in and RF out.
The auto mode works flawlessly. Speake a couple of words and it is tuned. I
wish I could say that about the others. Most of my
Thanks for the report, George. I made a minor, blood-pressure-reducing
change to the subject line ;)
73,
Wayne
N6KR
On Dec 9, 2012, at 9:22 PM, george fritkin wrote:
No it is not with the KAT500, it is with the 8 other outboard tuners
I have. My KAT500 is not radio controlled but is just
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