So, I got my KXPA100 kit and have assembled it. But I'm having trouble
keying it with my transceiver (HPSDR Hermes with alterations to support
driving the KXPA100). My circuit didn't have any trouble keying my
previous amp (a HFPacker V4). If I manually short the KXPA100 key input
things
John,
The diode drop is likely the primary culprit. If you must use a series
diode, use a Shottky diode (like a 1N5711) and not a silicon diode (like
a 1N4148).
The key input goes to a microprocessor digital I/O pin inside the
KXPA100, and a diode drop - especially with a significant
Can the TT digital interface be used with the K2?
Thanks,
Vince Santis, N1VS
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Take care with inverters etc, QRM wise..
Even the Pure Sinewave types, employ a HF inverter internaly, and then form
the sinewave by PWM methods, much like a class D power amp. Hence the
higher cost, as they have two types of high power switching systems in one
box.
If not well filtered,
Vince,
I can't say for certain because there is very little information on the
website - no schematic or wiring information.
Any interface that provides audio in and out and keying can be made to work.
One thing for certain is that you would have to make an adapter(s) for
the audio in and
I seemed to have malconfigured the KAT500 Utility-to-KAT500 and can not
find the correct settings for my COM5: Baud/Parity/Stop-Bits/Flow control
any quick answers?
Oh, I did make sure the USB-to-KAT500 is both connected as well as
registered by the appropriate computer as present and
Just curious if it is within the realm of reason to have completely
different displays (future upgrade???) on the P3 vs. it's VGA output? I
know they're slightly different now, since there's a longer waterfall on the
VGA than the P3's own display. So much so, that I never even look at the
I think that there are a number of us hoping for more functionality from
the P3. This does get addressed in this list from time to time with the
occasional tantalizing glimpse of what might be just around the corner.
For me, I would like the P3's display to show other information pertinent
to the
Don,
Nice try and I have seen the issue in SSB as you describe. However my
issue has to do with the initial carrier level in AM (amplitude
modulation) mode which occurs with the audio properly adjusted.
73 Jack KZ5A
On 1/13/2014 9:06 AM, Don Wilhelm wrote:
Jack,
Are you driving the K3
Oh No!
Is there a list of unimplemented features anywhere?
Thanks
David Anderson GM4JJJ
On 13 Jan 2014, at 21:55, Bruce Beford bruce.bef...@myfairpoint.net wrote:
Not yet implemented. -Bruce, N1RX
Let's try this post again, looks like the text was truncated...
Can't seem to get the
Can anyone suggest a reasonable priced LCD monitor to use with the SVGA card in
the P3? Looking for one that is quiet with NO RFI noisy power supply. The one I
use on my desktop (older Samsung LCD) has to be unplugged it’s so bad. Monitor
does not need to be one of the gigantic ones, it will
Wayne has been promising writing that bit of the software since the KX3 was
launched!
Dave
Ww2r
From: Jim Klitzing j...@w6pql.com
To: elecraft@mailman.qth.net
Subject: [Elecraft] KX3 transverter offset
Message-ID: 52d45e6d.1040...@w6pql.com
Content-Type: text/plain; charset=ISO-8859-1;
Jim -
I do not use the SVGA card in my P3, but have two new monitors in my
station and they are not noisy at all. They are 24 ACER G246HL LED
monitors that one of my daughters gave me for Christmas. I believe she got
them at Tiger Direct, at just a bit over $100 each. Not sure about that,
but
Can anyone suggest a reasonable priced LCD monitor to use with the SVGA card in
the P3? Looking for one that is quiet with NO RFI noisy power supply. The one I
use on my desktop (older Samsung LCD) has to be unplugged it's so bad. Monitor
does not need to be one of the gigantic ones, it will
On Tue, Jan 14, 2014 at 6:25 AM, Bob KD7YZ kd...@denstarfarm.us wrote:
I seemed to have malconfigured the KAT500 Utility-to-KAT500 and can not
find the correct settings for my COM5: Baud/Parity/Stop-Bits/Flow control
The KAT500 does not present any options for those. It attempts to
connect at 4
I had very good luck with MFJ-4403 line conditioner connected to a cigarette
lighter socket. 4403 has supercapacitors inside and utilizes a fact that an
average current drawn by a 100W radio in transmit is usually less than 8
amp. The conditioner is light, cheap and nondistorting. Remember to use
On 1/14/2014 11:21, iain macdonnell - N6ML wrote:
The KAT500 does not present any options for those.
What happens when you select the correct COM port and click on [Test
Communications] on the [Port] tab of the KAT500 Utility?
constant searching ... however:
Also check that the 1/8 plug
My K3's speaker audio seems to have gone West. Audio out of the phones, but
nothing out of the internal speaker.
It happened when I was installing a new external speaker, a DSP Desktop speaker
from BHI.
Having read some recent posts about the audio chip blowing up because of using
a
mono
The speaker amp is U1 on the DSP Board. The IC is an LM4950TS.
The pins are very closely spaced, too close for me.
Elecraft now has an Audio Protection Assembly circuit board, Part
Number E850506 for $2.36 plus shipping.
Dave Hachadorian, K6LL
Yuma, AZ
-Original Message-
From:
Check that the speakers have not been turned off in the menu. I leave my
speakers connected and then use the PF2 key to execute a macro to toggle the
speakers setting.
Sent from Samsung Galaxy Note
Original message
From: Stewart stew...@twinwood.me
Date: 14/01/2014 16:36
Unimplemented features are not found on the blank back cover of all Elecraft
manuals.
73 de AC8NS
Hop
- Original Message -
From: David Anderson da...@gm4jjj.co.uk
To: Bruce Beford bruce.bef...@myfairpoint.net
Cc: elecraft@mailman.qth.net
Sent: Tuesday, January 14, 2014 10:51 AM
After recently reading (and re-reading, several times!) Fred Cady's excellent
book on the KX3, I was thinking about some of the functions I'd like to have in
macro form. I already have PF1 set to switch the AGC from Fast to Slow and PF2
set to turn off or on the backlight. I've got the KX3
KAT500 poer off
K3 Power OFF
P/s's all off.
P/S all on
See and Hear KAT500 receive the P/S 12v
Push-on the K3
See ERR PTT scrolling on K3 and K3 TX LED is on.
can't figure it out. Have tried CONFIGPTT to no avail and dunno where
to leave it anyway.
Use also the Tigertronics SignaLink-USB for a
Still two, but since at power up the first item if you hold the MENU
button is the backlight, I'd consider re-assigning PF2 to the new
function you want.
73,
Lyle KK7P
After recently reading (and re-reading, several times!) Fred Cady's excellent
book on the KX3, I was thinking about some
Bob,
Somehow, somewhere, either the key or paddle or PTT is closed - at least
the K3 thinks that is true.
You might first check visually to see if you can find the culprit. If
not ---
Remove the mic, key, paddles and your interface from the K3 - then with
K3 power on, plug them in one at a
Should have been an extra piece of paper in your manual, David. Was like
that at least when I got mine (#602).
Concerning transverter offset: it *must* be in there latest with the
release of the KX3-2M ... when-ever that will be ...
73, Olli - DH8BQA
Am 14.01.2014 16:51, schrieb David
Hi Ron,
no, if you just cut off mains and bring it back the KPA500 will not turn
on again by itself. You have to turn it on by either pressing the front
panel on switch, by using the KPA Utility (this is how I do it in my
remote station) or by a small macro script assigned to one of the K3
On 1/14/2014 7:56 AM, Jim Leder (Hotmail) wrote:
Can anyone suggest a reasonable priced LCD monitor to use with the SVGA card in
the P3? Looking for one that is quiet with NO RFI noisy power supply. The one I
use on my desktop (older Samsung LCD) has to be unplugged it's so bad. Monitor
does
Hi Emory -
Yep, I'd like a couple more programmable buttons, too. I also run a logging
program on my Mac - MacLoggerDX - and am going to ask the developer if he has
any way (or plans for) to send macros to the KX3, or K3. Since that program
uses my KX3--computer port, I can't run it and the
Yes and no. When you switch the mains power back on, the microcontroller
should recognize the front panel power button press and be able to connect to
software via its serial port. The KPA Utility should be able to reconnect; use
its port tab Test Communications button. If the KPA500 has
I bought an ASUS VS Series VS197D-P Black 18.5 5ms LED Backlight Widescreen
LCD Monitor, and told the store I was going to bring it back if it was an
RFI offender.
I unboxed it, attached it to P3, powered up the K-Line and listened to the
background noise levels up and down each band with the
Jim,
I just re-tested this with both a keyer paddle and a hand-key. If you set up a
VOX delay setup in CW mode, then switch to SSB and hit the key, on release you
get the same delay that was in effect for CW mode. (Of course this requires
that CW-IN-SSB be turned on by tapping '1' in the CW
KX3 beta firmware rev 1.87 (with DSP rev 1.28) is now available. See recent
release notes below.
You'll need the latest version of our KX3 Utility application (1.13.8.24) to
download and install firmware. For full instructions on loading beta releases,
as well as KX3 Utility, see our KX3
Bob,
It's not on the web site. I heard about it indirectly, sent them
an email, got the part number and price, then called up and
ordered two, one for each of my K3's. I haven't installed them
yet.
Dave Hachadorian, K6LL
Yuma, AZ
-Original Message-
From: Bob
Sent: Tuesday,
Elecraft now has an Audio Protection Assembly circuit board, Part
Number E850506 for $2.36 plus shipping.
The Audio Protection Assembly replaces the 470 uF output capacitors C2
and C3 on the RF board with a series combination of a 1 Ohm resistor
and 470 uF capacitor. The same thing can be
Lyle,
Thanks. I would have thought that a transistor driver would have been
used to drive the I/O pin. Anyway, I measured the voltage drop across
the key input of the KXPA100 when the transceiver was attempting to key
the amp. The drop was 2.1 volts. Since the voltage for the circuit is
On 1/14/2014 2:08 PM, John Marvin wrote:
Lyle,
Thanks. I would have thought that a transistor driver would have been
used to drive the I/O pin. Anyway, I measured the voltage drop across
the key input of the KXPA100 when the transceiver was attempting to
key the amp. The drop was 2.1 volts.
Oops, sorry for the prior mistaken posting.
I just realized I can try an experiment directly shorting the key input
of the KXPA100 through a variable resistor, in order to find what is
required to trigger it. I can then do the math and add another .1v
safety margin in order to determine
John,
For reliable operation, the input to a CMOS device must see a low level
of 1.5 volts or less. Your 2.9 volts is in the indeterminate region.
As a side note, a high level should be at least 3.5 volts (up to 5
volts), but in this case, the high level is determined by the pullup
John,
Rather than rely on the particular switching point of a sample of 1
KXPA100, why not measure the voltage across the variable resistor - when
it is 1.3 volts or lower (1.0 volt if you are adding the voltage drop of
a schottky diode), measure the value of the resistor - that is the
David-
The latest list of unimplemented features can generally be found in the
errata for the latest version of the manual. This can be downloaded from the
Elecraft website, in the manuals and downloads section. Unfortunately, the
transverter offset is not currently listed in the latest errata (it
It seems there's still a demand for our custom order 700 Hz 8-pole K3
filters. In fact, we've already started a waiting list for the next batch,
and hope to commit to production -- possibly within a week, but if not, then
preferably no later than the end of January. That would see the filters
What's the opinion on BOSE COMPANION 2 SERIES III MULTIMEDIA Speakers for use
with K3 or KX3?
You WILL experience RF getting into them on the upper bands. They sound good
and function well on the lower bands (75 160) but as you move up to the
higher bands...key that mike and begin to
I would strongly recommend using un-amplified speakers with the K3.
There is enough audio drive to handle then nicely. I was fortunate
enough to find a pair of RS Optimist speakers at a thrift store, and
they work great with the K3. Yes, you need a splitter to break out the
left and right
I have a few of those cube speakers left over from my mad days. So, I
picked up an el cheapo rar shack stereo amp and voila, Rcvr A on left
channel, Rcvr B on right channel.
No RF problems yet.
Those who are left handed may consider reversing that !!
73, Dick, W1KSZ
On 1/14/2014 4:40 PM, Tom
Look for a used set or new of the Mackie HR824 powered monitors.
They're better than you need but they will not have Rf issues, at
least they're on my desk with the K3 in-between and I've never heard
anything come through them during 1500 watt transmit.
Gary
KA1J
What's the opinion on BOSE
Can someone explain to me exactly why the chip failed, and what the Audio
Protection Assembly is for ?
Tnx, Dick, W1KSZ
On 1/14/2014 10:21 AM, Dave Hachadorian wrote:
The speaker amp is U1 on the DSP Board. The IC is an LM4950TS. The
pins are very closely spaced, too close for me.
Elecraft
About three years ago, I bought a cheap little 720P 15 Insignia (Best Buy
brand) TV for not much over a hundred bucks.They've dropped considerably
in price since then. Along with being an HD TV, it has HDMI, VGA, Component
(RGB), S-Video and composite (yellow) switchable inputs. It even
Dick,
If you have an early K3 *and* you plugged a mono connector into the rear
speaker jack, one channel was shorted by the mono connector. That will
cause failure of the audio amp for the speaker.
Later K3s (I don't know the serial number) have protection for that
shorting condition. The
I have a set of the Bose Companion II. I really like them using them with
my K3 and my computer. They have two inputs so I can listen to either or
both. I have several SDRs I use with my computer to feed audio. The only
time I have experienced RF getting into them is with my AMP at times.
I want to pass along this info in case anyone else runs into this problem.
Got the K3 and KPA500 working well. It is a nice package. No problems. As I
also have a SteppIR antenna I use a N8LP SteppIR Tuning Relay in series with
the
Key Out - PA Key line. I am using the KPAK3AUX cable set.
A search of Nabble shows that this issue has been noted before.
http://elecraft.365791.n2.nabble.com/KPA500-PR6-AUX-Cable-Pin-11-td7558085.html
73 - Steve WB6RSE
***
When I try to hook in the PR6-10 I use the CTRL line on the PR6 connected to
Pin 11 on the K3 ACC jack. When I
I use these through the headphone jack to mitigate rf. They work very well, but
the wall wart is sensitive to rf through the speaker jack,
Greg Mason
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I am sure there will be several responses, but when you insert a mono plug into
the ext speaker receptacle while the K3 is energized the chanceof shorting
out the stereo output causes an overload and the chip may fail. Mine failed
as I inserted a mono plug into the stereo speaker jack. The
For about a decade or more, I have been using a homebrew interface
between my K2 and laptop that consists of three wires wrapped together
and terminating at the mic connection, with transmit audio and ptt to
the appropriate mic connector pins, and RX audio coming thru an unused
pin (I think an
Simpiliar is to not plug anything in to the K3 while it is powered on...
Mel, K6KBE
On Tuesday, January 14, 2014 5:07 PM, Mel Farrer farrerfo...@yahoo.com wrote:
I am sure there will be several responses, but when you insert a mono plug into
the ext speaker receptacle while the K3
I am using the KX3 with the KXPA100 with the built in tuner. Earlier today
when I turned on the Notch filter to kill a heterodyne, it was successful but
also muted the audio a bit. When I then turned the Shift/Width control the
slightest amount the audio came back to normal volume. Has anyone
We had a good net last Sunday with 44 participants over a 32 minute period.
There were two nice DX check-ins and a solid group of KX3 and QRP stations.
Here is the list:
Station NameQTH Rig S/N
K6VWE StanMI
Wayne and the group
Thank you for the new KX3 experimental firmware. I downloaded it tonight and
quickly decided in my city environment the NOR setting was better for listening
to weak stations on the low end of the broadcast band as I was getting some
type of interference from higher in the
Putting a mono plug into the stereo jack is not the ONLY failure
mechanism for the speaker amplifier chip. It was not the cause
of failure of my two K3's.
I'm not sure anyone fully understands the failure
mechanisms in the speaker amplifier.
The new $2.36 mod adds 1 ohm resistors in series
Has anyone been able to successfully get N4PY¹s Pegasus Plus to run on a
Mac using Windows 7 running under VMWare Fusion? Any hints or suggestions?
I suspect I may have a USB to Com Port issue.
Thanks,
Bob - N7RJN
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Elecraft
I also use the Bose Companion II with not a hint of RFI. I am feeding from
the rear Ext Spkr jack, I run 1500w on cw/rtty/phone with no issues.
They sound great for both K3 audio and music. For their size they pack some
punch.
73,
Randy N1KWF
On Tue, Jan 14, 2014 at 7:58 PM, Greg Mason
Thanks for the report, Ken.
At lower voltages, especially in voice modes, you should consider dialing back
power output to preserve the amplifier's headroom. For example, if the supply
is dipping below 11 V, I back the power down to about 50 W, just to be safe.
This is only a 3-dB drop in
Glad to hear that. I have the Chill Pill speakers that either Wayne
or Eric recommended for the K3, but I may want something better.
Bose is a favorite brand of mine. I have a pair of their
noise-canceling headphones, and recently replaced my Acoustic Research
AR-3 speakers with a pair of
Sorry, but the only solution to keep the two outputs isolated is to provide two
audio output jacks, one for left and one for right. AND have a appropriate
limiting coupling cap or series limiting regulator for the amp. IMHO.
Mel, K6KBE
On Tuesday, January 14, 2014 6:13 PM, Dave
I finally ordered and have received my West Mountain COMspkr for use
with my KX3. Work very nice and no RF sensitivity (even with 6-elem
yagi pointed at . I played with the HI CUT control and found a
2-oclock setting pleased me. I have no equalization set on the
KX3. With the control full
I am trying to write three macros to switch between three different Mic set
ups;
Front Panel High Gain no bias
Rear panel, Low Gain, bias
Line in
I can access the Mic Sel Menu with MN053;and I can move between front, rear
and line in easy enough with the UP;/DN; commands.
Then things get
On 1/14/2014 7:36 PM, Wayne Burdick wrote:
At lower voltages, especially in voice modes, you should consider dialing back power
output to preserve the amplifier's headroom. For example, if the supply is
dipping below 11 V,
I would work on raising the battery voltage, and on reducing the IR
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