Just send RX;. This will cancel the transmission and works in all modes.
73 de Tom, DL2RUM
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-glitch-canceling-CW-using-KY-tp5710873p5712497.html
Sent from the [K3] mailing list archive at Nabble.com
Ghostly signals will once again emanate from Frankenstein, Missouri,
over Halloween weekend.
Witches and warlocks of the Mid-MO Amateur Radio Club will be
haunting victims near QRP frequencies on 80, 75, 40, 30, and 20
meters (higher bands if open).
Spirits screeching from two skeletal K3s
Ghostly signals will once again emanate from Frankenstein, Missouri,
over Halloween weekend.
Witches and warlocks of the Mid-MO Amateur Radio Club will be
haunting victims near QRP frequencies on 80, 75, 40, 30, and 20
meters (higher bands if open).
Spirits screeching from two skeletal K3s
the frequency will not change at all.
There must be a setting that controls this, but I have tried the manual
and could not find the answers
Thanks and 73
Tom W2SC 8P5A
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seems to really like the 3.2 Ohm Motorola speakers.
73,
Tom Hammond N0SS
At 08:16 10/04/2010, you wrote:
Over on qth.com in the forums area (the Talk sub-forum) is a
discussion called A sad thing happened
on the way to a more perfect receiver. Some interesting topics
came up
Has anyone got a *reallly simple* checklist for setting up the K-3 to run
RTTY. I'll use MMTTY and I'll use AFSk and I will *not *use an outboard
interface like Rigblaster, etc. I mean really simple as in Step 1: Turn on
the radio.
73 de Tom (K7ZZ
Congrats on finishing K2 #6980 and your dx contact first crack out of the
box. Wishing you many more.
Great call, btw. People have accused me of QLF...hi
72
Tom
WB2QDG
K2 1103
- Original Message -
From: stan levandowski sjl...@optonline.net
To: elecraft@mailman.qth.net
Sent
As a suggestion, it would be nice if the P3 would automatically reset itself
when the sub receiver is invoked (guess this would require the K3 to report
this out, so not sure how feasible this is!).
73, Tom W4KX
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] On Behalf Of Tom Doligalski
Sent: Wednesday, September 22, 2010 4:46 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] P3 ref level and sub receiver
As a suggestion, it would be nice if the P3 would automatically reset itself
when the sub receiver is invoked (guess this would require the K3
For what it's worth, I used a silver alloy when I built my K2 as that was
being recommended at the time. Apparently there has been a change in
thinking away from silver. I can't say I've had any negative effects with
it, though.
Tom
WB2QDG
K2 #1102
- Original Message -
From: Giuseppe
of grounding between the Vibrokeyer levers and the base of the
paddle is via the contact return springs? If so, man, that's a
HORRIBLY POOR connection to be relying upon.
Thanks for your time,
73,
Tom Hammond N0SS
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. If we can't fix the real problem, then we should use
them.
73 Tom
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contact range will be 150 mA coils or less and cost a couple bucks
from mail order houses.
73 Tom
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Anyone have a KI02 for a K2 that's excess to their needs and that they'd
like to sell (either built or unbuilt)?
Thought I'd ask around before placing my order to Aptos.
Thanks,
Tom
WB2QDG
K2 1103
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it will prevent damaging
signals getting to the rx input.
The RPA can output well over 1/2 watt, so don't expect it to act like a
limiter. It makes a good QRP transmitter.
73 Tom
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,
the ALC acts as a processor.
73 Tom
After using mostly these rigs for SSB contesting in FY5KE or in other
places, we are still facing a lack of dynamics, punch,
penetration, power, whatever you call it. In other words, when
comparing this rig to our radios we previously used (TS-850
Below is what all my protected supplies use. I'd never do it any other way.
The best over voltage protection is a 4 component circuit using a SCR, a
ZENER, a resistor, and a capacitor. Oh yes, a fuse also! Since the circuit
goes across the supply to ground, it does not carry output current
Chuck,
I don't think you're right - the K3 'Key Out' is spec'd 200V @ 5A. The FL2100
'RY' relay control switches 12V @ 200mA only.
73
Tom G3OLB
AE4CW wrote:
However, you will need an interface to key the amp from the K3 as the amp
keying voltage is not compatible with the K3. I used a simple
Check the actual amp you are using, old is not enough to know voltage and
polarity on the relay line. :-)
The FL2100 and 2100B are negative low voltage.
The FL2100Z is positive low voltage with a huge current spike.
http://www.w8ji.com/fl2100_problems.htm
73 Tom
I stand corrected - hadn't realised the 'Z' was different.
73 Tom G3OLB
- Original Message -
From: Tom W8JI w...@w8ji.com
The FL2100 and 2100B are negative low voltage.
The FL2100Z is positive low voltage with a huge current spike
Sam,
You understand it correctly; TX or TX/RX antennas on ANT1 and ANT2, a RX only
antenna on RX ANT IN. Selection of ANT1 and ANT2 by the front panel ANT switch,
and enabling of the RX antenna by the front panel RX ANT switch. The K3 does
the rest.
73,
Tom N2CU
K3 #3582
The SB230, like the SB200 and a few other amplifiers, has negative high
voltage keying line voltage. The voltage is well over 100 volts negative. It
is not compatible with the K3 and many other radios that are designed for
the standard positive voltage lines.
It can actually damage many
Bill,
Use K3-EZ ( http://home.roadrunner.com/~n2bc/SW.htm ). This allows saving up to
four separate equalizer settings.
73,
Tom N2CU
K3 #3582
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If you do not have an **adjustable** current limited supply, do what I do on
the bench.
I have a 35 amp limited supply on the bench, and my 13.8 volt buss has jacks
that are direct, through a 10 ohm 10 watt resistor, and through a second 10
ohm in series with that.
I can get a really good
through the gear, and not depending on devices that let 700 volts in or out
to protect solid state devices. It's the poor lead routing and ground
bonding that really kills our gear. Especially when the power mains ground
and the shack ground have any significant impedance between them.
73 Tom
of reasons, the most prominent of which is
if the negative lead fuse to the radio opens you can blow up accessories or
open ground traces including traces in the radio.
They are not even recommended in vehicles any longer in some countries
because of the fire and damage hazard they create.
73 Tom
of errors in
calibration
73 Tom
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Please
It might make gain 2dB, but what does that do overall to dynamic range? Has
anyone measured performance with both attenuator and preamp on??
- Original Message -
From: Don Wilhelm w3...@embarqmail.com
To: Bill McDowell k4...@earthlink.net
Cc: elecraft reflector elecraft@mailman.qth.net
Thanks Ian, that was helpful!
- Original Message -
From: Ian White GM3SEK gm3...@ifwtech.co.uk
To: elecraft@mailman.qth.net
Sent: Tuesday, August 10, 2010 2:52 AM
Subject: [Elecraft] Button HOLD time
Don Wilhelm wrote:
I can't help with eliminating the ATT hold button.
But
memories.
That might be able to be a hold, I'm going to try making the hold delay
longer.
73 Tom
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This is NOT a bug, this is working EXACTLY as it should. Some time you
want to have a little extra gain, but not as much as the Pre does alone.
In this case you will run the Pre ON, and the ATT on at the same time. No
bug there. Just another way Elecraft has made the K3 a versatile rig
Depends on the Amplifier, I have a SPE Expert 1K-FA.10watts drive =
500
watts out
http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr;sid=f338c42916def7b9976d97732e60ec83;rgn=div8;view=text;node=47%3A5.0.1.1.6.4.157.9;idno=47;cc=ecfr
§ 97.317 Standards for certification of external
A big box K3 with dedicated buttons would be a lot better for contesting.
I'd certainly buy a few to replace my FT1000MP MKV's. Right now I have to
keep two types of radios.
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: elecraft@mailman.qth.net
Sent: Monday,
Personal attacks against people, including name calling, are way out of
line.
Some very good operators operate here, and they prefer radios without so
many multifunction knobs.
It isn't because they are silly, whiners, or otherwise incompetent and there
is no reason at all to call names or
distracted. I'd take a bigger box to have those
band buttons.
73 Tom
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project will be
easy if you watch lead or connection lengths on the 12.5 ohm end.
73 Tom
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output. Shouldn't me much
difficulty to do this if it comes to that point.
Hope this helps.
73,
Tom Hammond N0SS
Or should I make a longer cable and feed the P3 separately?
Thanks in advance for any information you can provide.
de mailto:k...@k2gn.comK2GN - Larry - http://k2gn.com
K3 S/N
of
the lines (on the upper non-inverting TLT) and what you accept for SWR.
73 Tom
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are testing the system only as a transmission
line, and not really testing any balanced characteristics of the system.
73 Tom
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several
times in years past... I wouldn't be without one.
73,
Tom Hammond N0SS
K3/P3 Field Tester.
At 14:54 08/05/2010, David Wilburn wrote:
Will the P3 (at some point) be able to monitor / display the output of
the K3 (or any other radio)? Such as a band scope to check modulation
levels
believe you will be too.
73
Tom
WØUY
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of internal logging that could be uploaded to computer
also, neat if some type of X:Y tuning pattern was available !
Simple, but would begin to wean the radio from the computer
73
Tom Kenville -- W6TJK
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and Hustler 6BTV are about at the top of the all-band
gain (80-10 meters) and have nearly identical performance. They both are
trap verticals, although one of them pretends it does not have traps.
73 Tom
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-up ratio to the secondary. To confirm that, turn
it around and excite the secondary and measure the primary.
73 Tom
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stays resonant on the band selected. Total weight: about 14 pounds. No
part is over two feet in length (i.e. it packs in a suitcase). About 8.5
dBi gain at that wonderful 10 degree take-off angle.
73 de Tom (K7ZZ)
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current with a resistive load. This means a 120 volt secondary transformer
is always more than 120 volts RMS without a load or with a light load. With
a capacitor input bridge rectifier would provide noticeably less than 1.414
times 120 volts at rated current because of power factor.
73 Tom
is
claimed even if the antenna has traps by simply calling the trap something
else. Most of the time traps would have less loss than the systems we are
convinced are better.
73 Tom
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CBers it was a 3/4 wave helical
vertical with gain over a regular six-foot long helically wound vertical.
I hope we are not reverting to that level, but it seems we are!
73 Tom
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just accept the fact that products can freely get ripped off.
I expect to see more and more of this in the future.
73 Tom
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Hopefully, you'll also think, SM-220/SM-230 (or YO-100).
Tom N0SS
At 21:44 07/30/2010, Brett Howard wrote:
When you read sensor Think W2...
~Brett (N7MG)
On Fri, 2010-07-30 at 09:29 -0500, Jim Miller KG0KP wrote:
And it was dated today when I downloaded it (yesterday) and
started
flow.
73 Tom
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Both have connectors on a single flat plate with a design for radically
flowing shield currents from the center common point.
That should, of course, have been radially flowing currents and not
radically flowing currents. Darn auto-correct.
).
73,
Tom Hammond N0SS
At 12:15 07/25/2010, you wrote:
The power pole connector cable I recd with my k3 has no place for a pin.
The darned thing keeps disconnecting.
HELP
Great Grandmaw Susan
If you don't change direction you WILL arrive exactly where you're
headed!! Susan Meckley
73 Tom
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While this is true I still feel that any KEY_IN source be it PTT or VOX
or the paddles it should interrupt the memory keyer.
Makes total sense to me. Any call for another transmission source, VOX, PTT,
external key line input, or paddles, should halt automatic transmissions.
in N's. Mostly due to someone picking the wrong antenna at
full poweror lightning. Most of the N's left in my system are being
replaced as they fail.
73 Tom
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to be on its own
independent core. They cannot share a common flux path.
73 Tom
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. Unfortunately that is not
likely either. :-)
73 Tom
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no defined balance at
all, because it has nearly infinite common mode impedance.
I'll have an article out in a week or so, maybe less, that explains this all
in detail.
73 Tom
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here
the nearest dirt is about 25 to 30 feet away.
Jay,
It would be really useful to learn why the key out line did that. It is very
unusual. What type of amplifier do you have, and what antenna and band???
Tom
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wrong. This would include filters, combiners, splitters, and loads. 1/2 inch
at 35 ohms is nothing below UHF.
73 Tom
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is wrong.
For your filter application, you could use anything.
73 Tom
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insidebut I do think that the issue with standard mud type UHFs is
with the durability of the dielectric, not with the impedance bump, at
HF and even low VHF frequencies.
That's an accurate statement John. The largest bump I've even measured with
a SO239 PL259 pair was about 1.05:1 at
In the traditional sense, LINE was a broadcast and
recording industry standard for FIXED signal at 0dBm, and
600 ohms. It was used to interconnect various pieces
equipment and was supposed to relieve the engineers of the
need to determine what the signal level was and what the
source and
voltage is misplaced.
It would also be very important to be sure the booster to stay at the
voltage under full load.
73 Tom
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entrance but adding the proper
device would not hurt. I rely on my DXE and RCS-8V antenna switches for
differential mode coaxial line protection because they do a much better job.
73 Tom
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. If the output end has an isolated
ground, ground loops are eliminated. Rather than bolt things on my desk
together with 00 ground cables, I isolate audio ground loops.
73 Tom
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lethal voltages, and a fault could drive the negative interconnect up to
thousands of volts negative as capacitors discharge.
73 Tom
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Can someone give me a short answer as to why Win-Test was the
overwhelmingly popular logger, especially versus N1MM?
Probably because it emulates CT (DOS) which most contesters are very
familiar and comfortable with.
Exactly. That's why people like it, and it networks easy. Unfortunately it
and every line,
I would also pay attention to what Jim Brown said about the pin 1 problem.
That is at the very top of important things to worry about.
http://www.w8ji.com/station_ground.htm
Pete, being on the second floor, has some additional wiring tricks he must
do.
73 Tom
this
year alone.
73 Tom
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Please help
.
I'm not so sure a measurement like this isn't just a measurement of
odd-order IMD in stages following the filter.
73 Tom
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including a DSP system and audio
amplifier, that way in an effort to determine bandwidth.
Is anyone else here familiar with notched noise IMD measurements?? I only
used them a few times in the 80's, so my recall is limited.
73 Tom
and power entrance.
73 Tom
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My concern for any Switching supply is the RFI noice that the radio will
pick up
from the power supply. Looking at the SEC 1235m, I was reading that it has
a
build in RFI filter. Plus I like the AD5X mod to slow down the fan. And
the
Alinco DM-340 MVT has a knob to change the freq. of
as the gain is reduced.
I think you want something that cannot be done.
Besides, S meter are pretty much meaningless anyway. I only use mine to tell
me when I need to use an attenuator pad or a preamp.
73 Tom
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important, and what is
never useful?
73 Tom
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I would have no use for a 750 Hz filter. 99% of the time I use SSB bandwidth
on emty CW bands, or less than 500 Hz BW.
I have my filters set so the 500 Hz roofing kicks in at 600 Hz BW, my 250
roofing in at 350.
This is in an attempt to soften the big 50 Hz selectivity steps when using
narrow
analog system when signal levels are near noise levels,
especially when the noise floor is a bit rough.
73 Tom
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of that, but I have only seen a reed
relay version.
The advantage of the one I saw is the low loss and no signal distortion
using relays. You must run the amplifier relay control through it to be sure
the protection sequence is correct.
73 Tom
This is almost certainly thermal drift from heat.
seem OK, the power from driver and the power output remain stable
during key-down, but the current increases...
What could be the issue?
Before spending more time on troubleshooting, has someone had and
solved the same problem?
Poor
Does anyone have experience with the amplified D104?
Dick, KA1SA, #911
I cut those boards out of mine, except for the PTT switch mounting. I prefer
something more simple and easily controlled.
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power from
the antennas results in a peak voltage much greater than 0.5 volts.
.5 volts peak, which is the approximate conduction limit of a silicon
rectifier like a 1N4007, is only 4 dBm That will turn your K3 into a
Yaesu FT-101 for IM and even order performance.
73 Tom
receivers I have
tested), feedline loss would be 3 dB plus you would have an additional .12
dB mismatch loss at the antenna (the source).
Sounds to me like the K2 you have needs more sensitivity if a dipole with 4
dB or less system loss won't firmly set noise floor.
73 Tom
at 1500 watts on 160.
Use a relay Jorge along with a regular small limiter and be sure it is 100%
safe to be disconnected before transmitting with a limiter for backup.
73 Tom
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Hi Vic,
So the voltage produced by the receiving antennas is relatively low. I
agree that it wouldn't work with a resonant antenna.
On my Beverage antennas (which are low gain) the accumulation of AM BC
signals, SW BC signals, and so on at night is enough to light the filament
of a 12 volt
. My oldest D104 has been with me since the 70's when I used it
with a Drake line. Still ticking just fine and still excellent audio after
all these years, and with the little cheap FET mod works great with either
low or very high impedance loads 40 years later!
73 Tom
and with the other I hear this click click click?
Jorge,
What band? What is your TX antenna for that band and how far from the 40
meter antenna is the TX antenna?
73 Tom
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as a
voltage source.
:-)
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: elecraft@mailman.qth.net
Sent: Saturday, July 10, 2010 12:20 AM
Subject: Re: [Elecraft] D104 mic
On Fri, 9 Jul 2010 20:47:36 -0400, Tom W8JI wrote:
It will sound great if you add a J310
bandwidth in the least noisy direction)
the rig is sensitive enough.
73 Tom
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The Johnson T-R switch came in two iterations, as I recall. The first
one suffered from suck-out, as did the second, but less so.
Signal suckout occurs because the tank circuit in the transmitter presents a
low impedance when the tube end of the tank is misterminated during key-up
(resting
. The higher the resistance the more the low frequency
response.
Until I started using a Sennheiser computer headset I used a D104 head on
all my rigs.
73 Tom
- Original Message -
From: Chris Hembree w7...@yahoo.com
To: elecraft@mailman.qth.net
Sent: Friday, July 09, 2010 7:11 PM
Subject
of QRN, a sort of reverb as he
described it.
To me it sounds more like a little intermodulation or mixing of the noise
and signal. I've even considered building an analog IF system just to see
if I like it better. :-)
73 Tom
on SSB/RTTY so receivers are always
locked. The K3 already does everything we use in contests! Sometimes it just
takes an extra external switch or two to do things right, fast, painless,
and easy.
73 Tom
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audio gain controls is too cumbersome for this mode.
http://www.w8ji.com/images/Shack/RX-ant-select.jpg
73 Tom
- Original Message -
From: g0afh g0...@g0afh.com
To: d...@w3fpr.com; Elecraft@mailman.qth.net
Sent: Tuesday, July 06, 2010 4:26 AM
Subject: Re: [Elecraft] K3 Audio routing
the spacing is so close and the polarization is the same. There is virtually
no difference between those antennas in S/N, directivity, and polarization.
73 Tom
- Original Message -
From: Giancarlo Moda i7...@yahoo.com
To: elecraft@mailman.qth.net
Sent: Tuesday, July 06, 2010 2:36 PM
Subject
in any
phase combination since both antennas primarily have vertical response.
73 Tom
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That's what I had to do Pete. The bail is far too tall for me also.
After trying to whittle wood and bend metal, I finally cut some dense closed
cell foam on my band saw and made a nice little riser for the front.
73 Tom
Thanks! The current one only elevates the frot bottom edge of my K3 2
installed, would contain used parts. Not a good
idea at all.
73 Tom
Actually that sounds reasonable. The item may not cost a whole lot
to manufacture, but by the time you add in the overhead cost of
having it on hand, paying someone to take the order, go get it from
stock, package and label
. It prevents hot switching antenna
relays by locking out any changes while transmitting.
Band decoder and antenna controller with amplifier lockout all in one box.
:-)
http://www.ameritron.com/man/pdf/RCS-12.pdf
73 Tom
As suggested by someone else, W9XT BCD-10 is a very good, simple
decoder for use
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