t 120 Volts. MFJ has
some inductors and low value caps in their power supply to control RF noise.
A 5 Farad cap is not cheap. I guess that is why it is more expensive.
73 Karl K5DI
Karl Larsen wrote:
Hi Henry, you can buy a power supply which is more powerful and I
use daily for a FT-857
I am with you Jim. Field Day rules should change to allow a CW
station to operate QRP and get the added score for being QRP, with
another station working SSB at 1500 watts who get the usual 1 point,
per contact.
Not sure who to write and ask for the change. But this last FD QRP
SSB was
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You mu
Hi Ron thanks for the re-print of the manual. It is a lot more than
just an antenna. It has a lot of electronics including computers of that
era to measure the direction the signal is coming from. I bet the system
cost a whole lot of money back then.
And when you see that there is a bu
Guys, the ARRL almost caused a revolt in FCC-Wireless. They were being
visited by ARRL people daily. They are lawyers and they are trying to
kill Internet on power lines, and push band planning and morse code
testing removal.
Then after they GOT the band plan they pushed it was discovered A
fails.
I'm a Fox in the Fox Hunts and I run a local CW net. I like CW and I
will keep using it. But I'm 71 years old and my 3 mile walk is getting
harder.
72 73 Karl K5DI
Matthew N8OHU
- Original Message - From: "Karl Larsen" <[EMAIL PROTECTED]>
To: "V
All these numbers are fun but do not mean much. What you do if you
run QRP is learn about propagation. If you have the prop, you work about
as well as a 100 watt station. If you don't, go do something else.
Yes if you run 1500 watts to a good antenna you will get the DX
first. At 5 watts
Hi Bob, that looks like a dandy solid state amp! With all the Value
Added Taxes in your countries now how much does the amp cost in Pounds?
Since the Dollar is lagging the Euro it will be over $3000.00 without
the VAT.
73 Karl K5DI
Bob Jones wrote:
Hello Jean-Francois
I suggest you take
Hi Brian I thought I ordered a SG-2 last week but since everything
has been down did you get my order? I have not seen the money taken out
of my account yet.
Karl Larsen K5DI
Brian Broggie wrote:
One minor correction; it was not our ISP at fault, it was qth.net.
They run a bunch of
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I have bought about 30 of the recharge AA batteries and they all
still work in my Sony cameras and ats-3 radio. I would not use Lithium
batteries there but have them on my tiny VX-2 handi-talky. Those were
made for Cell-phones and seem to last very well. Same with my
Cell-phone. I think the
Ron D'Eau Claire wrote:
Joe, AA4NN, wrote:
I'm guessing, then, the 1GB PC2700 333MHz memory card
I purchased from an internet site $40 cheaper than same spec memory card on
the Dell site is inferior and could fail soon? de Joe, aa4nn
No. In fact you may have determined the cost to Dell fo
Don Wilhelm wrote:
Kieth,
A dipole cut for 40 meters will provide a high feedpoint impedance on 20 -
and the L network used in the Elecraft tuners do not do high impedances very
well.
I find the T1 does very well with a very high impedance. I end feed
1/2 wave wire connected right to the
Kent Tannery wrote:
Can someone tell me the "official" definition of QRP Power Level? Is it 5 watts for voice and CW modes? I notice that many contests have a QRP class but they do not define QRP power and I cannot find it on ARRL site.
The definition is a firm maximum from the transmitter o
[EMAIL PROTECTED] wrote:
In a message dated 7/8/06 8:29:46 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Field Day rules should change to allow a CW
station to operate QRP and get the added score for being QRP, with
another station working SSB at 1500 watts who get the usual 1 point,
p
After some thought the problem is simply that a 5 Watt SSB station
even on a very good antenna will, as a rule, make fewer contacts than a
QRP CW station in the same Group. The reason is QRM. A good CW radio
like the K2 or the AT Sprint 3 have narrow bandpass which is perfect for
CW. It help
Here is the rule in question:
7. Scoring: Scores are based on the total number of QSO points times the
power multiplier corresponding to the highest power
level under which any contact was made during the Field Day period plus
the bonus points.
7.1. QSO Points
7.1.1. Phone contacts cou
Dave wrote:
You could have a scoring system based on power levels. The RSGB low
power contest has a power level related scoring system that works well. See:
Field Day does have a scoring system based on power levels. The
change desired is to allow different power levels to exist at a site
I sent this to the ARRL contest people who are on vacation now,
yesterday. It is exactly this:
Dear Sir:
My name is Karl Larsen and I want to change the rules for the Field
Day Contest. You have over the several years made it attractive to operate
QRP from batteries (7.2.1). My
When you try to compare two radios you get into a can of worms. I
own an FT-817 of about 5 years ago and it's a fine radio. It covers 6
meters and the two VHF-UHF bands that are not on a KX1.
But the KX1 uses less input power on receive and thus will last a
lot longer on the internal bat
manual if you would like to try this.
I have put together a AT Sprint 3 which is 99% SM devices. I have a BIG
magnifying light on an arm and all the tools you can need.
73 Karl
On Jul 11, 2006, at 8:19 AM, Karl Larsen wrote:
When you try to compare two radios you get into a can of worms. I
I'm a T1 owner and I use the 44 and 88 foot dipoles. I can say with
experiance that everything Ken says is true. You just can't do better.
73 Karl
Kenneth A. Christiansen wrote:
Hi from Fargo, ND and many camp sites.
This is the antenna I have used for the last 5 years in my camper wi
Hi Don and the others. I'm an EE and here are some things to
consider. For EME the K2 will be driving the transmitter via a high
level mixer and the receiver will be a converter built to tune 432
MHz. If I were doing it I would mix down to 14.000 to 14.350 MHz. This
Brian Murrey wrote:
John
I have LOVED Klipsch speakers for over 30 years. I don't think you can beat
them. I have a pair of KG-1's that have to be 25 years old in my TV cabinet
right now and they sound as good today as the day I bought them.
I live in Las Cruces, NM and went to New Mexic
Christopher A. Kantarjiev wrote:
After many months, this thread rears its ugly head again :-)
At the time, I said that I would take a crack at updating "Your Novice
Accent" and collecting resources for the new ham who is trying to get
proficient at CW.
I decided, after a while, that updating
Ron Polityka wrote:
Hello,
I will be out on the Appalachian Trail north of Strausstown, PA for
the Flight of the Bumblebee.
Wx is going to in the 90's with high humidity. There is also a good
chance of strong thunderstorms. That is the reason why I plan on going
to a location I could get ba
JEAN-FRANCOIS MENARD wrote:
Hi to all of you !!
I did my first attempt of using a long wire with my Elecraft K2 last
weekend. I was amazed how the K2 with the KAT2 tuned everything !!! A
simple 28 feet long wire with 2 radials of 16 feet each.
I used a small rock with a small rope to finally
This morning the Flux was 70 and the K index was 0. This is "Sunspot
Minimum" readings of the sun. What does this mean to a QRP Operator?
Do not re-align your K2 receiver, or re-tune the transmitter for
another 0.1 Watt of output. Leave it alone because the bands are broken,
not your rad
Ron D'Eau Claire wrote:
The 'bottom of the sunspot cycle' can be downright frustrating if one wants
to work DXCC in a weekend using a dipole, but it can be a very interesting
time to be 'spooking the aether'.
I work most of my DX when the bands are 'dead'. I don't band-hop much. I'll
pick a ba
Stephen Okolita wrote:
Hi folks,
I want to build a switching power supply for my K2/100
and KAT100 (so, 20+ amps) however I've had trouble
finding a decent switching power supply design that
uses all off-the-shelf components. I know that
there's a design in the ARRL handbook but I'm not
crazy a
Nick Waterman wrote:
Dave White wrote:
I like this idea. Perhaps the IF shift function could be assigned via
the PF1 or 2 buttons to another control besides the VFO - the keyer
speed comes to mind.
Damned fine point... If IF shift is rarely useful for CW, and Keyer
speed is never usef
- Original Message - From: "Karl Larsen" <[EMAIL PROTECTED]>
To: "Nick Waterman" <[EMAIL PROTECTED]>
Cc: "Dave White" <[EMAIL PROTECTED]>; "Elecraft Reflector"
Sent: Thursday, August 10, 2006 7:38 AM
Subject: Re: [Elecraft] RE: IF Shift th
Jack Smith wrote:
To hear a beat note when sending CW, your VX-7R will have to be in SSB
or CW mode. When set for AM reception what you are hearing is normal.
Jack
Michael Cook wrote:
OK, I'm back for more help. I've been building a KPA 100 and I'm at
the part where you are supposed to first
Hi Keith, Everything is working just GREAT! Just like it should. On
that antenna it takes 10 seconds for the automatic tuner to do it's job
and it does. I think you need another counterpoise about 33 feet to get
the swr down to 1:1.
Do not worry about the estimated power out. If your cur
Dave G4AON wrote:
Having an FT857D and TS570D, when I compare the CW performance of my K2
with them, the K2 wins every time. Due in no small part to the narrow
"roofing" filter inherent in a single conversion receiver, the good and
quiet solid state change over and the low noise receiver.
H
Joseph Trombino Jr wrote:
Howdy Gang:
I've built a bunch of kits over the years and the following technique
works very well for me and keeps me from messing up...it is a bit
labor intensive but it has proved to be foolproof for me (me being the
fool or course:)
I get sheet of legal size pap
I have had the pleasure to build with Surface Mount integrated
circuits. It is critical to get them to stand up on the outline on the
printed wiring board, but then when you get the four corners right then
I just use a tiny amount of solder and get the 28 other pins soldered.
It is almos
Guys your leaving in the speaker which makes some radios sound
terrible. Do this: Get your best earphones and plug them in and listen
to quality. My AT Sprint 3 which has good audio sounds clean and clear
on good signals like WWV when they are not modulated.
I had a Drake 2B and it was
Guys, my money is on the connector on the feedline. It must have a
short developed since the last time you used it. Or the short might be
at the antenna feed point.
The feed line length is just not a factor even when there is RF on
the shield, and there is some.
The MFJ Antenna Anal
Dan Presley wrote:
Guys, my money is on the connector on the feedline. It must have a
short developed since the last time you used it. Or the short might
be at the antenna feed point.
The feed line length is just not a factor even when there is RF on
the shield, and there is some.
So
Don Wilhelm wrote:
Steve,
You might try ordering from Mouser - they state their export policy as
follows "Mouser exports to over 100 countries with no minimum order or
handling fee. Go to www.mouser.com/terms for details and restrictions."
I have no experience, just passing the info.
I
Randy NV0U wrote:
You just need a pair of crimpers that have a little dimple in them.
See: http://home.comcast.net/~buck0/app.htm and look at suggestion #2.
I am sorry but the crimper you are showing will NOT work at all
well! It is exactly like the $10.00 Crimper on the web page and neither
The DDS chip with a TCXO frequency standard makes a really stable
radio. If Elecraft wanted to make an all band CW radio this design might
be the one to use. The new Double Balanced Mixers can go a long way
towards improving Image rejection, a current problem with single conversion.
It
Robert T. Davis Jr. wrote:
I'd like to order A Nakko 936-12 solder station but I need to know if
this unit will work with a 220AC input. and if not I assume I can use
a step down tranformer, 110 at 50 HZ?
If you have or can find a small transformer it will work. The solder
station I
[EMAIL PROTECTED] wrote:
Yes, I received an identical message.
Doug
W6JD
-- Original message --
From: "Darwin, Keith" <[EMAIL PROTECTED]>
The last 2 messages I sent to the list made it, but I also got a funny
"bounce" message.
---
Sorry. You
Mike Morrow wrote:
Karl wrote:
The DDS chip with a TCXO frequency standard makes a really stable
radio. If Elecraft wanted to make an all band CW radio this design
might be the one to use.
The clock frequency of the DDS in the KX1 is 50 MHz, the highest for which the chip is rated.
Craig D. Smith wrote:
Interesting comments earlier about a new 160 tru 10 KX-1 replacement. I'd
like to offer another alternative.
To do all the bands will add significant cost / size / weight. I would
favor a modular approach with just the case and common circuitry/ controls
in the main enclo
Geoffrey Mackenzie-Kennedy wrote:
Karl Larsen wrote:
There are new chips that run with a 100 MHz clock.
And things seem to be getting better. The Analog Devices AD9951 can I
understand be clocked at up to 400MHz, and I hear whispers about
higher clock frequencies.
Hi Geof, I get the
I have been downloading PDF files explaining the way H-mode Mixers
work, and then the data sheet for the Texas Instruments SN74CBT3125
large scale integrated chip in surface mount size. The H-mode Mixer is a
double balanced Mixer that uses a Quad-FET bus switch as the non-linear
part of the
Geoffrey Mackenzie-Kennedy wrote:
Wayne Burdick <[EMAIL PROTECTED]> wrote:
There are potential issues with using any type of mixer besides the
present SA612 in the KX1.
First is PCB space. The present mixer, which requires nearly no
additional parts, barely fits. I seriously doubt that ther
As you study the act of mixing, you discover it is non-linear.
Somewhere there needs to be a non-linear device with current flowing
through it usually caused by the LO power injected into it. That is why
the LO needs to be a large signal.
The bad part of a mixer is it mixes with EVERYT
Dave Sergeant wrote:
I knew this would stir things up a bit from the other side of the
pond.
Two final comments.
I did a search at the UK dti.gov.uk website, the issued ROHS
Directive and other linked sites, and NOWHERE could I find among the
numerous exemptions one saying that kit and homeb
Geoffrey Mackenzie-Kennedy wrote:
Henry, [EMAIL PROTECTED] , wrote:
Has anyone tried any of the DF4ZS RF speech processors
(http://jwm.de/afu/index0.htm) with a K2 yet?
For those who think the SSB "punch" is a little weak, maybe this
would help.
In fact, maybe this would be a good Mini-Modu
Geoffrey Mackenzie-Kennedy wrote:
Karl Larsen, K5DI wrote:
Hi Geoff, I would suggest if your making a mini-module let it be a
speech compression device, not a clipper. Compression increases
average power used and sounds louder. If set too high it sounds odd
and can create clipping that generate
Thanks Bill for all the information and the fact that the K2 has a
chip from Analog Devices that should do the desired job. I have the pdf
thanks Bill and will study that with interest.
A question. Does the K2 have a variable resistor at R! Compression
ratio set?
73 Karl
Bill NY9H
Karl-Heinz Kaatz, DF7KHK wrote:
Hi Karl,
A question. Does the K2 have a variable resistor at R! Compression
ratio set?
Yes, the resistors RP5 are the 'variable' resistors for compression.
Yesterday I had send a mode for other compressions. With other
resistors you make your own three com
Don Wilhelm wrote:
Darrell,
That has ben dropped from the more recent handbook (does not appear in my
2005 edition).
I am going 'out on a limb' here by saying that this stems from the concept
that 'some keyclicks are good' philosophy. Sidebands on a CW signal are the
result of the keying shape,
Matt Osborn wrote:
Hi Tom,
Nice to hear from you.
On Thu, 21 Sep 2006 18:28:12 -0500, Tom Hammond <[EMAIL PROTECTED]>
wrote:
Hi Matt:
Sorry to hear you're having problems.
You wrote:
I'm really disappointed that CW isn't working for me. A week after I
received my tech license, I
Steve, G4GXL wrote:
On 22/09/06, Karl Larsen <[EMAIL PROTECTED]> wrote:
My webpage is at: www.zianet.com/k5di and click on CW. And download
Koch.
Matt
The file on Karl's website is actually a copy of the excellent G4FON
software from Feb 2004. - version 6.0.11
You would do muc
[EMAIL PROTECTED] wrote:
Just got my October issue of CQ and saw a review of this very small power
supply made by Gamma Research, model HPS-1a. It is 3.37 X 1.55 X 5.25 inches,
rated at 13.8 VDC, 22 amps at 25% duty cycle and 5 amps continuous, and weighing
only 1.25 lbs. If you do not get CQ
Tod Glenn wrote:
Greeting all,
I have a mail into elecraft, but thought I'd throw this out to the list.
I took my KX-1 out camping a few weeks ago, where it was working
fine. I finally unpacked it yesterday, and much to my dismay, it
seems to be dead.
Here's what I discovered:
The LED wor
Zac Brown wrote:
Fellow Elecrafters,
I am putting up a 135 ft flat-top at my QTH. I'll be feeding it with
about 60 ft. of 450 ohm ladder line, connecting the feedline to the
BL2, and tuning it with the KAT2.
With the balun and auto-tuner you have a great antenna system!
However it may be
I'm sorry but I need to add this before Zac Brown does something
real stupid. When using 450 ohm feed line you must use this EXACT
length. The exact length is that which goes from the antenna to the
balun in your shack.
Any talk about matching the 450 ohms is not correct. The feed line
John Buck wrote:
The voltage on my meter is 13.65 with no load.
With K2/100 set for 50 watts out the voltage drops to 13.3 with a
string of 15 wpm dashes.
At 75 watts it drops to 12.75 volts.
At 100 watts it drops to 12.2 volts.
Due to the large capacitance, it takes several seconds to drop to
[EMAIL PROTECTED] wrote:
I have been following the 135 ft flattop thread with interest. I was running my
K1 into a 40m wire vertical via 100 ft of RG8x. After doing some loss
calculations, that seemed pretty silly,
A 100 feet of RG8X is a looser for QRP.
so I set out for a more efficient.
James Duffey wrote:
KArl - You wrote
" A 100 feet of RG8X is a looser for QRP."
Well, WD4LST was using 100 ft at 40 M, which amounts to 0.6 to 0.8 dB
of loss depending on the feedline pedigree. RG-213 is about 0.5 to 0.6
dB at the same length and frequency, so the RG-8X looks pretty good,
p
Darwin, Keith wrote:
There's the good old fashioned way of doing it. Use a separate receiver.
Maybe a KX-1?
My shack is evolving (no Darwin jokes, please :-) at the moment. I'm planning
on running the output of my rigs (currently 3) into a mixing board that will
feed a single audio filter
jpgabbard wrote:
Looking for a service manual for the Kenwood TS 440s, Many thanks,
John KF7OM
Call 800 807-6146 and W7FG will have what you want.
73 Karl K5DI
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Dave G4AON wrote:
There is a simple way to measure the efficiency of a balun, make two of
them and connect them "back to back". Measure the power fed to them and
the corresponding output power. Obviously this doesn't take a mismatched
antenna into account.
I did just that about this 5 years
N2TK, Tony wrote:
I ask this as a question - Putting baluns or UN-UN back to back checks that
both have the same ratio and can check efficiency if they are transformers
such as what is used on beverages. How does this check if it is working well
as a balun? As an example, a straight piece of coax
://www.zianet.com/k5di/
73 Karl
[EMAIL PROTECTED] wrote:
Great Idea - thanks for pointing me to the obvious .
Just as I was contriving a highly complex solution to a non existent problem!!
Besides, one could always use another balun.
73s
Pete
From: Karl Larsen <[EMAIL PROTECTED]>
Jeff wrote:
Hi gang,
The K2 is the first rig I've had that has adjustable AGC. Under what
conditions would one benefit from using fast AGC? It seems that slow AGC is
easier on the ears on CW.
Most new radios have this feature Jeff. Back when there was just
Fast AGC or No AGC we used
Dave Sergeant wrote:
On 15 Oct 2006 at 4:02, N7RR wrote:
The FCC Report and Order 06-149 has thrown us a curve by extending the
Amateur Extra Class phone band down to 3600 kHz (far more than the ARRL had
requested), meaning that practical CW and digital operations, which have had
lots of s
Darwin, Keith wrote:
Hmm, using the full bar graph to show S1 to S9? Not a bad idea. I may
do that once I get the 41 step attenuator.
All this AGC talk makes me think TenTec's hang AGC should have been the
ideal. In effect it would turn the RF Gain down when a big signal came
in and keep it
So you don't get too far from Reality, What changed is that an
island of Extra Class Phone and CW frequency down to 3.600 MHz is going
to happen.
If your a General Class Ham you lost a lot of frequency in the old
CW part of the band which most General Class guys never used because
the
I hold all my toroid coils firm to the board AFTER all tuning is
complete with my Hot Glue system. It tacks down everything but not so
tight you can't get it loose. I do not find the hot glue to be corrosive.
I buy my hot-glue tubes and the gun at any good Hardware store.
73 Karl K5DI
Bill Carpenter wrote:
My K2/100 is indicating high current draw on a portion of 40 meters
but only on the antenna. On the dummy load there is no problem. It's
not high SWR as both antennas it happens with (double bazooka and
ground mounted Butternut vert) indicate low SWR on my MFJ analyzer,
Larry wrote:
Noticed the following on eham:
http://www.youtube.com/watch?v=fAOOd48j6WA
Its a very well done video showing ham radio and contesting. Worth a
look.
Hi Larry it is a nice video and it's done in Denmark. The main
character owns the place and everyone else are friends. The fan
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