Hi Jeff,
I have done that by comparing BAND DATA signals from both K3s using a
74HC688 8-Bit Comparator. When both BAND DATA signals are equal the P=Q
output from the HC688 disables transmitting on both K3s (TXinh). I used
the HC688 because I have decimal BAND DATA signals from my band
Hello Jeff,
I use the Array Solutions AS-RXFEP inline w/ my K3 AUX (2nd rx input). At
times the rx antenna is within 20 feet of the tx antenna. Without the
protector in place the receiver COR relay was being triggered with as
little as 20 watts at times, but with the RXFEP inserted, I could run
I think you'll need to get the back off to get to the APPs. You'll prob have to
remove both housings. Use a small screwdriver to lift the contact lip over the
spring and pull the housings from the rear. Push new housings on and reassemble
the radio. I've never tried to remove two housings
Take a look at the transceiver front-end protector in the “Articles” section of
my website at www.ad5x.com. It operates full QSK (I tested it to 80WPM). Works
great.
Phil – AD5X
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Larry,
The Microham mk2r+ will do exactly what you want to accomplish. If both
rigs are on the same frequency, neither will transmit.
It is, however, an expensive solution. I was lucky and picked up a used
one at a very good price.
Rich - N5ZC
On 5/31/2014 11:04 PM, Jeff via Elecraft
My approach to this was to use my band decoders to drive a 4P relay and use
the relay contacts to drive filters, antenna switching, and an add circuit
so if 2 of the relays were on the same band a piezo device that emits a tone
as a warning of both radios being on the same band. My 2 radio band
Be aware that bluetooth audio is useless for CW work. There's too much latency to use it with a
paddle. The sidetone you hear in the bluetooth headset is out of sync with the keying.
--Mark
--
Mark Newbold K7NEW
Sequim, Washington, USA
http://dogfeathers.com
The weekly Elecraft SSB net meets today at 1800Z on 14.3035 MHz. I will be NCS
from western Oregon. See you there.
Phil, NS7P
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Help:
On 2014-06-01 1:02 AM, Don Wilhelm wrote:
You should have no problems with paralleling 2 headphones on the
audio output of the K3, with no need for any external mixer.
I would not risk it. The K3 headphone amplifier is only rated for
105 mW at 16 Ohms. Both power dissipation (heat) and
How are others using SO2R avoiding same band transmission and
subsequent receiver damage?
SO2R controllers like the microHAM MK2R+ have built-in same band
interlocks that prevent PTT if both rigs are on the same band or
if one rig stops responding to control polling. Some of the contest
A simple interlock can be built with a single quad XOR gate package,
half a dual 4 input NOR package and a few transistors/resistors if one
is driving the inhibit input. Add half of a quad NOR gate package if
you want to disable PTT.
73,
... Joe, W4TV
On 2014-06-01 10:54 AM, Joe Subich,
I'm surprised to learn that there is at least one other living human
being that knows what an APL golfball is. The Selectric was a great
machine. I only ever used it as a terminal - but it sure had a pleasant
keyboard.
I don't work nearly as much cw as I would like to. I've always had some
This would be a good place to use an Arduino. If the serial ports of
the K3s are available, it would only take a small bit of code to achieve
this.
Doug -- K0DXV
On 05/31/2014 10:46 PM, Don Wilhelm wrote:
Jeff,
That is a logic question seeking an answer. I don't know of a simple
If the serial ports of the K3s are available,
They tend not to be when doing SO2R - the logger has them tied up.
Of course if the Arduino is capable of handling four 38,400 bps
ports at the same time one can pass the logger data through the
device.
73,
... Joe, W4TV
On 2014-06-01 11:19
While you're in the programming mode, how about some preventative medicine.
Prevent one rig from switching to a band that the other rig is on. If
it tries, switch back to the old band.
73 de Brian/K3KO
On 6/1/2014 11:19 AM, Doug Person via Elecraft wrote:
This would be a good place to use
Check out a 74LS85 4 bit comparator. A single chip with the A=B output going
to each of the K3's ACC pin 7, TX INH inputs.
73,
Fred KE7X
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Joe Subich, W4TV
Sent: Sunday, June 01, 2014 9:28 AM
Mark,
Latency on this unit is about ~100msec..
With my QRS code it'll do the job -- I hope...
But it'll do just fine for me to be able to monitor while away from
the rig doing chores --
Lonesome George :-)..
Dave G KK7SS
Richland, WA
Be aware that bluetooth audio is useless for CW work.
The simplest get you there now solution is to simply disable
complimentary bands in each K3. Set up the left radio for 80-20-10 and the
right radio for 160-40-15, for one example.
You didn't buy Steppirs to exclude bands on each radio, but this will give
you protection now while you pursue one of
On 6/1/2014 7:45 AM, Joe Subich, W4TV wrote:
You should have no problems with paralleling 2 headphones on the
audio output of the K3, with no need for any external mixer.
I would not risk it. The K3 headphone amplifier is only rated for 105
mW at 16 Ohms.
I agree with Don that it's
Of all the programming languages whose demise and disappearance I
lament, I lament the demise and disappearance of APL the least.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org
On 6/1/2014 8:15 AM, Doug Person via Elecraft wrote:
On 2014-06-01 2:11 PM, Jim Brown wrote:
I agree with Don that it's perfectly fine to parallel two sets of
headphones on the output of a K3. The load impedance of most modern
headphones is much greater than 16 ohms.
You can't guarantee that with any two random headphones - my shack has
On 6/1/2014 11:29 AM, Joe Subich, W4TV wrote:
You can't guarantee that with any two random headphones - my shack has
headphones anywhere from 8 Ohms to 200 Ohms.
I would change that. Simple Ohms Law suggests that's a very bad idea,
for reasons noted in the next sentence.
Paralleling
I've used this headphone distribution amp, it has jacks and pots for four
listeners. $25.
http://www.amazon.com/Behringer-HA400-4-Channel-Stereo-Headphone/dp/B000KIPT30/
wunder
K6WRU
On Jun 1, 2014, at 11:29 AM, Joe Subich, W4TV li...@subich.com wrote:
On 2014-06-01 2:11 PM, Jim Brown
I got a 3-channel headphone volume booster at RS for $7.95 [IIRC].
Runs on 2 AA's, one gozinto, three gozoutofs. The audio on my KX1 and
K2 is too low for my compromised hearing.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org
On
On 2014-06-01 2:39 PM, Jim Brown wrote:
Paralleling headphones of with differing impedance and sensitivity
will result in one operator getting too much or too little audio
and may require gain high enough to result in excess distortion or
dissipation.
That may be true, and is the only
A final comment to the issue of keyboard vs mill. I find that the keyboard
tactile feel is not as good as a old hard mechanical mill. Albeit you need
more pressure to complete the stroke, but it is positive. Something like the
feedback sound of the paper being hit. I think mainly because I
There can be no greater example of a geek language than APL. I've known
a few research scientists that actually used it. Looking at APL code
was like looking at something written on another planet by a non-human
culture. It was, however, a true first generation language having been
initially
On May 27, 2014, at 10:12 PM, Chip Stratton c...@strattonfamily.us wrote:
I have takers for the two extra sheets of MAB boards so more volunteers
not needed. Someone may be willing to let an individual board or two go,
but I'm sure they will post it to the reflector when the time comes.
On May 25, 2014, at 8:31 PM, Joshua Gould jg.k8...@gmail.com wrote:
I am going to be acquiring a 56 foot Rohn BX tower. I already have a G5RV
that I am planning on putting up (still not sure where I'm going to attach
the other end of it to, One end will go on the tower.) I'm going to put up
On Apr 14, 2014, at 12:14 PM, Stephen Bloom sbl...@acsalaska.net wrote:
I have a K3 line at my home station ...and of course am a real fan. I am
often on the team at the KL7RA M/M station here. We have an ongoing (good
natured) dispute about whether the K3 is a feasible M/M rig (not
Glenn,
What was the DC voltage at 100 watts keydown?
It should be 12 volts or greater - more is better, 13+ is good.
If the voltage drops, the current will increase (and I believe the
efficiency decreases) to maintain your 100 watt output level. More
current, more heat.
An off center fed
The current firmware version for the KAT500 is apparently MCU 1.67. To access
it requires the KAT500 Utility version 14.2.20. That, however, seems to be
available only for Windows. The latest utility version for Mac OS X on the
website is 1.14.2.1. When I run that, the latest firmware
Are WINDOWS PC's banned from your household?
Certainly you know somebody who owns a WINDOW's laptop.
If the situation were reversed and I needed an APPLE computer for a few
minutes to install new firmware, I'd beg or borrow one.
73 de Brian/K3KO
On 6/1/2014 22:28, Dauer, Edward wrote:
The
Hey Gang,
I thought it would be interesting to have some Remote stations available
at the WRTC HQ station at WRTC 2014 this year. This will allow all those
folks
who are coming, but who are not competitors, to take part in the IARU fun.
It will also provide an additional set of logs for the
Ted,
I have a Mac, I have a KAT500, and I have MCU 1.67 installed on my KAT500 and I
am using the KAT500 Utility program version 1.14.2.1.
Everything works hunky dory.
Now, I am not sure why the Elecraft web page suggests 1.14.2.20 except for the
fact that it does denote the latest Windows
A very elegant solution that seems to have become a defacto standard here in
Tampa is the Behringer HA400 headset amp. Several years ago I purchased one for
our local club, ther are now 4 there, plus it has also migrated to the St
Petersburg radio club. Simply plug a stereo mini plug into the
One of these:
http://www.genebitsystems.com/david/K2MiscAccessoryBoard/index.htm
73,
Matt VK2RQ
On 29 May 2014, at 12:40 am, Bill Coleman aa...@arrl.net wrote:
On May 27, 2014, at 10:12 PM, Chip Stratton c...@strattonfamily.us wrote:
I have takers for the two extra sheets of MAB boards
I recently purchased an inexpensive condenser microphone for the KX3. While
it's very functional for my needs, I was frustrated with the need to
manually push the XMIT button every time I wanted TX. I can't run VOX
because I have too many interruptions.
So I built a little PTT adapter for my Heil
There should be no reason that Ted should have to borrow a PC in order
to update the firmware in his KAT500. The OSX utility should have the
same functionality as the Windows version. In any case, there's also no
reason he should have to put up with a lack of courtesy when asking a
question on
Sad but true, Brian -- and not so much with
Elecraft who do provide support for Windows, OS X
and Linux. I purchased a really inexpensive ($280)
HP laptop for my shack, even though I mostly use
MacBooks: There's just too much Windows software
for ham radio out there to not have Windows
All KAT500 Utilities versions for Windows, Mac and Linux should be able to
fetch and install current firmware. Try clicking Copy Files from Elecraft, and
it should get the current production firmware from our FTP server to your local
computer file system. If it does not, you can use your web
I'm currently encoding the build date as the version #. 1.14.2.1 was built on
February 1, 2014.
Often W4SMT uses the same version number for equivalent function, even if it's
done later.
Dick, K6KR
On Jun 1, 2014, at 15:55, Phil Hystad phys...@mac.com wrote:
Ted,
I have a Mac, I have
Via iPhone
Cycle Siren, Inches
877 477-4736
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Guys,
I apologize if my posting offended anybody.
This is not such a far fetched question. In fact my son-in-law has such
a household. It made video chats with our 4 year old grandson a real
problem. He won't even use SKYPE and insists on FACETIME.
So how was this resolved? He loaned me
Hi Mark,
Tanks for posting this idea. You can also do PTT via the ACC2 jack; just set up
the ACC2 IO menu entry as LO=PTT or HI=PTT as the case may be.
73,
Wayne
N6KR
On Jun 1, 2014, at 3:58 PM, Mark Tannert m...@tannert.net wrote:
I recently purchased an inexpensive condenser microphone
Be careful, Brian. I bought one for my cousin to
use, an iBook, back in 2005. He passed away before
I was able to give it to him. I started using it
just to see what the fuss was all about. I was
hooked -- and none of my MacBooks have cost less
than 2 kilobucks as outfitted. Beware :-)
My
Thanks, Phil, and all others who replied. Borrowing a Windows laptop
wasn¹t easy but it worked; after which I went back at it with the Mac. At
that point the OS X - based Utility recognized MCU 1.67, which was of
course resident in the KAT-500 by then, courtesy of Windows. I have no
explanation
I have been running some RTTY on 17M and FSK-441 on 6M meteor
scatter, both of which have full period signals for 30 seconds or so. I
have reduced power to 250W, but by the end of a transmissions the fan
has gone to 747 short field take off mode at about 71C. Am I missing
something here
Well, I've only been licensed since 1958 and although I was using CW and SSB
in the early 60s on 2M and working MS and EME in the 70s, I too never set foot
on 6-meters until 2009. On Field Day (operating from home) I tried the K3 on
six. Of course, it's stone deaf so I cobbled up a preamp
On 5/31/2014 4:03 PM, Don Wilhelm wrote:
what did you do the break the APP housing, they are pretty sturdy things.
Once I looked more carefully at it, it turns out the wound was
self-inflicted. My operating bench has no clearance space behind it and
a shelf only six inches or so above it,
Am I missing
something here or is this normal?
Sounds normal for mine. I've recently had mine on 52.525 in an FM QSO. I ended
up at about 250W with short transmissions. That didn't surprise me much at all,
because my KPA seems to produce quite a bit of heat on six meters anyway. Hit
the
As far I know I cannot see any filter options for the K2, am I correct?
Currently looking at a K2 sn low 4XXX.
It is advertised as It has 1.7kHz, 700Hz, 400Hz and 100Hz filters fitted
.
Is this possible.
Thanks Gavin ZL1BBW
Gavin,
The K2 uses a single voltage-variable capacitance (varicap) diode-tuned
crystal filter on the main RF board, and the filter bandwidths are
programmable by the user within a moderate range. A separate fixed
bandwidth crystal filter is present on the KSB2 SSB option board if
installed. A no
Like Phil, I run exclusively Macs in the house. there are some Windows
PC's here (a laptop that I never use and an old desktop.) When I was
starting to program my radios via the computer, I threw a Windows in a VM
for programming purposes. I now use that rather than a dedicated Windows
machine.
In addition to the tuneable IF crystal filter, there are the KAF2 and KDSP
audio filter option (check out the Elecraft website for details).
73, Matt VK2RQ
On 2 Jun 2014, at 11:38 am, Mike K8CN mike.car...@unh.edu wrote:
Gavin,
The K2 uses a single voltage-variable capacitance (varicap)
I'm getting closer to where I will be able to purchase my KX3, and I was
wondering if there are any options that are easier to install during the
build than adding them later...
I'm planning on ATU and the NiMH charger. Everything else I'm going to
order goes on the outside of the radio.
Just
I've been having fun and some success with a 5 band hex beam. It's only at 20
ft and 50 ft would be much better. Its SWR is less than 1.5:1 on each band
20-10m. There is an option to add 6 m for little or no cost.
It's only 2 elements so it doesn't have a lot of fwd gain (9-10 dBi) but good
On 6/1/2014 5:59 PM, AG0N-3055 wrote:
Sounds normal for mine.
Yes, quite normal. The KPA500 is very well protected, while still
allowing as much power output as possible. I do lots of RTTY contesting
on HF, and JT65 on several bands, including 6M. Depending on the ambient
temperature in the
Gavin,
As has been explained by a couple others, the K2 filters (other than the
OP1 filter on the KSB2 option board) are entirely user configurable -
you can set the filter width and the filter center frequency as you
desire. You can find information for doing that at my website
Joshua,
The options are easy to add either way.
73,
Don W3FPR
On 6/1/2014 9:57 PM, Joshua Gould wrote:
I'm getting closer to where I will be able to purchase my KX3, and I was
wondering if there are any options that are easier to install during the
build than adding them later...
I'm
The filter option is a bit of a pain to add later
due to the calibration procedure -- done by
Elecraft even for kits if the filter is purchased
with the basic KX3.
Phil W7OX
On 6/1/14, 8:17 PM, Don Wilhelm wrote:
Joshua,
The options are easy to add either way.
73,
Don W3FPR
On 6/1/2014
One can probably find an electric typewriter, but that is not a Mill. A Mill
is a manual typewriter that has no shift. It is not good for typing and all
the ones that I have seen were manufactured in the forties. Mills are not very
useful for anything except copying code.
Willis 'Cookie'
Hi Don,
Thank you for the information and input about OCF antennas. I did a measurement
of the supply voltage to the KXPA100. here is what I Measure with my Fluke 77
meter:
The voltage measurement was taken at the supply power plug from the amp that
plugs into the KX3 to power it. I have the
When going through the menus, if I try scrolling through the options for
ACC2 IO and I get to LO=PTT, the radio freezes. I have to remove a
battery to get it to shut down.
Nothing is plugged in to the ACC2 jack. I'm on MCU 1.87 and DSP 1.28
-Dave
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