[Elecraft] #6107 - First Snag

2007-05-25 Thread Jim Murray
Hello All,
Progress temporarily halted by (who would ever guess)
a tilt bail.  Somehow I've gone from great design and
instructions to something that reminds me of putting
toys together at Xmas Eve.  Is this for real?  Can
anyone tell me the secret.  How many people does it
take to pull on the bail while dropping in the screws?
 Not sure a cave man can do it.
Jim


   
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 a better Globetrotter. Get better travel answers from someone who knows. 
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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Mark Bayern

IMO, the bail is the most difficult piece of the assembly.

I used longer screws while assembling the thing and then changed them
out, carefully!, one at a time to screws of the correct length.

There were some great discussions on the forum a few years ago about
the tilt bail. Lots of different ideas about how to get the blasted
thing installed. A check of the archives might give you some ideas ...
certainly it will give you a few laughs, and you won't feel like the
only cave-man in the forum.

Mark   AD5SS
K/2  5340
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Re: [Elecraft] Being ESD Safe,

2007-05-25 Thread Fred (FL)
Ron, Don -

I learned a good deal more clarification today, about
ESD Safe - and one's potential house wiring situation.
 Thanks.

Looks like one has to verify, with available
testers, and electricians if need be, that their
facility and shack and home, are wired correctly
and that the SINGLE GROUND, provided at the 
mains entrance to the facility, is correct and
operational as it should be by NEC code.  And it
is the ONLY ground connection, relied on.

And secondly, which now makes much sense, that no
secondary ground rods are to be used! - for one's
electrical service in the home or facility.
Multiple grounds, can create shock hazards.
And as Don pointed out - a separate ground
rod, if used at all, may be useful for one's RF
antenna system, and that is all.  But for ESD - the
single home and facility ground connection - is the
ONLY one to rely on for ESD safety.

Whether that is established, and working is the
chore at hand.

The IEEE Hospitals multiple-grounds problem,
was a case of new and old hospital facilities,
where they found multiple ground levels existing
in different places in the overall hospital.  This
resulted in patients being exposed to differing
ground-levels, all impacting on the patient's
monitoring equipments.  IEEE reported patients
may have died from this situation - and indicated
possibly no one (MD's  staff) realized this had
happened.

In our home, I hired an electrical contractor
to verify the condition of my electrical
plugs, and breaker box setup.  He found several
problems - and fixed them and brought them back
into compliance with current NEC code.  They
even pulled the meter - and lubricated the
mains HD cabling connections coming into the
breaker box.  (pulling meter, requires an
electrician, and action by power company, as
meter safety tag has to be broken)

The work  certification by a licensed electrician, is
especially important when electrical work is done
in a facility - for both personal safety, and to
ensure continued insurance coverage on a home
or facility.  It isn't a common sense, or seat of
the pants do-it-yourself operation.  There is a
method in the strictness of the NEC.

Thanks,
Fred, N3CSY




   
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[Elecraft] K2: sending PSK31

2007-05-25 Thread Peter Wollan
Following up on my earlier question, I can report that the minimal PSK31
interface described in the Elecraft Application Notes actually works.
For receive, I got a stereo cable with plugs on each end, running from
the K2 speaker jack to the computer line in, and for sending a stereo
cable from the computer earphone output goes to an 8-pin mic plug with
two resistors in it, 10K and 1K, as a voltage splitter.  Transmit is
keyed by vox.  No isolation tranformers, no USB mic converter.

Computer is a MacBook, software is Cocoamodem, and they work just dandy,
though I'd expect any other computer-software combination to work, too.
The hardest part of it all was locating an 8-pin mic plug for sale in
the US -- Cheapham.com came through.

Peter N8MHD


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RE: [Elecraft] #6107 - First Snag

2007-05-25 Thread Darwin, Keith
Oh, yes, I remember.  That blasted bail!

We can buy pre-wound toroids - someone needs to sell a pre-mounted bail!

I think I put my bail in a vise and tried to squeeze it down a bit.  I
also used some of the longer screws to get things started then swapped
them out once it was together.

- Keith N1AS -
- K2 5411.ssb.100 -

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mark Bayern

IMO, the bail is the most difficult piece of the assembly.

I used longer screws while assembling the thing and then changed them
out, carefully!, one at a time to screws of the correct length.

There were some great discussions on the forum a few years ago about the
tilt bail. Lots of different ideas about how to get the blasted thing
installed. A check of the archives might give you some ideas ...
certainly it will give you a few laughs, and you won't feel like the
only cave-man in the forum.

Mark   AD5SS
K/2  5340
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Re: [Elecraft] K2: sending PSK31

2007-05-25 Thread Ed - K9EW

The 8-pin plugs are available at your local Radio Shack (#274-001A).

73,

ed - k9ew


The hardest part of it all was locating an 8-pin mic plug for sale in
the US -- Cheapham.com came through.

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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Tom Hammond

Jim:

The way I've successfully done it, and with NO(!) effort, is to 
install the feet/bail using much longer (say 1) screws... TIGHTEN 
things down and then, one at a time, replace the long screws with the 
proper ones.


Using the longer screws makes it very easy to get everything in place 
BEFORE you have to torque things down.


Of course, you'll have to supply your own (4) long screws, but it's 
certainly worth the effort.


73,

Tom Hammond   N0SS

At 10:25 PM 5/24/2007, you wrote:

Hello All,
Progress temporarily halted by (who would ever guess)
a tilt bail.  Somehow I've gone from great design and
instructions to something that reminds me of putting
toys together at Xmas Eve.  Is this for real?  Can
anyone tell me the secret.  How many people does it
take to pull on the bail while dropping in the screws?
 Not sure a cave man can do it.
Jim



Be 
a better Globetrotter. Get better travel answers from someone who 
knows. Yahoo! Answers - Check it out.

http://answers.yahoo.com/dir/?link=listsid=396545469

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RE: [Elecraft] K2 ATU

2007-05-25 Thread Dan Barker
There is a RF cable from the ATU to the mainboard. The auxbux is detecting
the ATU so that's connected, but the RF most likely is not. The RF cable
plugs into the main board at RF-P6. Do not connect it to RF-P3, the battery
connector!

Dan / WG4S / K2 #2456

snipneither Ant jacks 1 or 2 seem to function, The regular BNC that is not
connected to the ATU works fine.
/snip

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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Don Wilhelm

Jim,

Install the first foot and tighten it, and then either:
1) Install the second foot using 'builder provided' long screws - after 
things are lined up and tightened with the long screws, remove the long 
ones one at a time and replace them with the proper screws.
2) Use a clamp to compress the bail - compress only enough to permit the 
screws to be installed, the bail must remain 'springy' or it will be 
loose and rattle.


I use both methods - the clamp head takes a bit of 'figuring' so you can 
tighten the screws with the clamp attached, but you can combine both 
methods and make things easier.


73,
Don W3FPR

Jim Murray wrote:

Hello All,
Progress temporarily halted by (who would ever guess)
a tilt bail.  Somehow I've gone from great design and
instructions to something that reminds me of putting
toys together at Xmas Eve.  Is this for real?  Can
anyone tell me the secret.  How many people does it
take to pull on the bail while dropping in the screws?
 Not sure a cave man can do it.
Jim

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RE: [Elecraft] #6107 - First Snag

2007-05-25 Thread Fred (FL)
VISE - that is the trick.  Just force some (SOME)
of the spring width out of the metal item.

It works fine, if you just squeeze it down a small
amount - do it in stages, as it would be hard to
make it wider again in a Vise.

Fred, N3CSY


   
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[Elecraft] SoftRock Lite for K3 IF application

2007-05-25 Thread Tony Parks

Good Morning All,

A number of hams have ordered a SoftRock Lite kit for the K3 IF application. 
The SoftRock Lite for this use includes a 32.768 MHz crystal to give a 
center frequency of  about 8.191 MHz.  This would require that the soundcard 
used for the application sample at 96 kHz to span the K3 IF in a good way. 
The resulting IF frequency coverage would be from about 8.143 MHz to 8.239 
MHz.  There may be some design issues with the kit I am providing relating 
to the signal and Z level at the IF output of the K3.


This morning I built an example of the SoftRock Lite for the K3 IF use and 
as I type this I have it playing on this PC using the Rocky 3.2 software. 
This SoftRock example needs a better test than I can do with my limited test 
equipment.  Is there someone on the list that already has a pre-production 
K3 and would be interested in evaluating the SoftRock for the K3 use.  If 
so, I would be happy to send them this unit at no cost if they would give it 
a try, help work through any interface issues, and report their findings, 
(good or bad),  to the list.


Please contact me at [EMAIL PROTECTED] if interested.

Thanks and 73,
Tony KB9YIG 


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Re: [Elecraft] Dead K2

2007-05-25 Thread Don Wilhelm

Kristina,

You will just have to continue measuring things until you discover the 
root cause.  Did you measure the resistance at the power plug with the 
power switch ON?  Try the checks below (in order until you find the source).


Measure the resistance to ground from the cathode of D12.  You may find 
it quite low (indicating a short).  Remove the control board and check 
it again - if the resistance increases, look for the problem on the 
control board.


If not on the control board, remove the heat sink and then recheck - if 
things are OK with the heat sink removed, check the thermal pads.


If you still have not found it, the 'hunting' gets more difficult.  Use 
the schematic to follow the path of the 12V voltage line - it starts at 
the lower right corner of RF Board sheet 1, and goes to the regulators 
on the control board, and various places on the RF Board (mostly on 
sheet 4).  Check those paths thoroughly, even if it means removing some 
components to see which side of the component the short is located.
Remember that the most likely cause is a solder bridge (connecting 2 
points that should not connect together) so a VERY careful visual 
inspection may reveal the problem source.


Work in an orderly manner - a short on a power line is difficult to find 
because the PC traces seem to go everywhere and it is difficult to 
isolate them - expect some frustration in the process.


73,
Don W3FPR

Kristina Wright wrote:

OK, here's what I've done so far: checked the resistance from the
power plug to ground, the meter read infinite resistance. Also checked
the voltage at the same and got 12 volts. Then I measured the voltage
at the cathode end of D10 and got 12 volts with the power switch on
and off, but at D12 I got nothing with the power off and 0.7 volts
with it on. Obviously the fuse is being tripped, but I still don't see
any shorts (yes I inspected the whole board carefully).
 Thanks for the help so far, any more ideas?

73,
Kristina, KE7LUC

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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Don Wilhelm

Fred,

I believe you are advocating bending a permanent reduction in the bail 
width with the vise (if not, I have misunderstood you).


I do NOT recommend doing that since it results in a loose fitting bail 
which will be 'floppy'.


Using a vise or a clamp to squeeze the bail temporarily while installing 
the screws is OK, but permanently distorting the bail is not OK IMHO.


73,
Don W3FPR

Fred (FL) wrote:

VISE - that is the trick.  Just force some (SOME)
of the spring width out of the metal item.

It works fine, if you just squeeze it down a small
amount - do it in stages, as it would be hard to
make it wider again in a Vise.

Fred, N3CSY


   
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RE: [Elecraft] K2 Was Fine Now Dead?

2007-05-25 Thread Allan Bacon
I started tracing 13.8 V from the power source 

Input 13.8 V

Diode D10 Cathode 13.8 V Anode 0 to ground as per specifications 

Diode D9 Anode 0 V Cathode 0 V

So, it seems power is not getting to the D9 Diode

From the schematic on page 64, it looks as those are the only components on
the trace from power injection to the KPA-100 to the Aux 12V at J4

Here is where my lack of knowledge shows up - 

1. Since voltage is not present on either side of the diode, should I pull
the heat sink and check the trace on the board?

2. Or - Does a bad (not even sure what that means) diode prevent voltage
from showing up?

3. Or - What

Allan Bacon
W6GBG


-Original Message-
From: Don Wilhelm [mailto:[EMAIL PROTECTED] 
Sent: Thursday, May 24, 2007 9:27 PM
To: Allan Bacon
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K2 Was Fine Now Dead?

Allan,

Was that J5, the 3 pin connector point (no header is normally installed 
there) on the RF Board near the front center (near the control board)?

If you did everything correctly, it should have no effect on the K2 
power-up condition.  If you wired to some other place than the 3 pin J5, 
remove what you added and try to discover what the error is.

It may have been something that inadvertently happened, and not at all 
associated with your additions - in that case, voltage measurements are 
in order.  You may have had a pin pushed back on the AUX DC connector 
from the KPA100, and it is no longer making contact with P3 on the RF 
Board - insert the crimp pins into the housing correctly if you find 
that to be the problem.

Is the KPA100 ribbon cable properly attached to the control board?
These are but a few starter questions.

73,
Don W3FPR

Allan Bacon wrote:
 K2 4670 with 100W and all options was working fine.
 
  
 
 Per the recommendation of Microham, I added a speaker jack from J5 to a
 stereo plug on the back of the case and now the unit will not power up on
 the KPA-100
 
  
 
 When I plug in power to the low power jack, the unit is OK, but will not
go
 to high power.
 
  
 
 Any ideas?
 
  
 
 Thanks,
 
 73,
 
 Allan Bacon
 
 W6GBG
 
  
 
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[Elecraft] NOT Elecraft- AD9912 SFDR Measurements

2007-05-25 Thread Giancarlo Moda
Hi all,

following my message inserted on may 24th : “Better to
use AD9912 and not AD9910”, I have received several
enquiries about any test done on the AD9912.

Yes, my good friend Giuliano, I0CG (of AD9951 DDS
fame), is performing measurements on the AD9912 and
also comparisons with his already well known and
appreciated DDS using AD9951 and a 500MHz clock.

I have uploaded a document in:
http://groups.yahoo.com/group/emrfd/files/ 
http://www.hamsdr.com/dnld.aspx
http://groups.yahoo.com/group/softrock40/files/

with title: “AD9912 SFDR tests.pdf “

The document reports some Spectrum analyzer
measurements on the AD9912 and also one comparison
with AD9951.  

When I0CG will release further reports I will
divulgate them.

73

Gian
I7SWX



  
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 Opinionated? Impossible to please? Perfect.  Join Yahoo!'s user panel and lay 
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Re: [Elecraft] K2 ATU

2007-05-25 Thread Don Wilhelm

Tim,

Even when the KAT2 is attached, you can still hear signals through the 
base K2 antenna jack - that is NOT a problem.


If you cannot receive through the ANT1 or ANT2 jacks on the KAT2, the 
problem must be with the KAT2.  Since I presume it worked before, look 
for the easy things first, like a break in the input coax or improper 
seating of the crimp pins in the connector.


If you set the menu to ATU CALP, you should be able to make a continuity 
check from the input coax center conductor to the center conductor of 
ANT1 or ANT2.


73,
Don W3FPR

Ellam, Timothy St. J. wrote:
I have a problem which I am sure is my own error, but for the life of me I cannot seem to find the fix. I just switched the K2/100 module with regular K2 cover which has the K2ATU. The menu shows ATU as auto, but neither Ant jacks 1 or 2 seem to function, The regular BNC that is not connected to the ATU works fine. I thought once the ATU was installed that jack was disabled?  Am I missing a menu change or do I have a more substantive problem? 
 

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[Elecraft] RE: K2 Bail

2007-05-25 Thread RBrigham1

 Fred,
 
 I believe you are advocating bending a permanent reduction in the bail 
 width with the vise (if not, I have misunderstood you).
 
 I do NOT recommend doing that since it results in a loose fitting bail 
 which will be 'floppy'.
 
 Using a vise or a clamp to squeeze the bail temporarily while installing 
 the screws is OK, but permanently distorting the bail is not OK IMHO.
 
 73,
 Don W3FPR
FWIW,
I first mounted the bail on my K2 without bending. The spring force was so 
great it warped the cover piece. I took it out and 'gently' bent it inward a 
bit. Now it still has good spring force -- is not floppy -- but does not warp 
the 
bottom cover piece.

This makes me think there is a bit of variability in the bails.

Rob
KC6ROC
K2 #5924
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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Dale Boresz
One of the most clever recommendations that I remember from those 
discussions a few years ago was to wrap a few turns of wire from one 
bail end to another and insert a short rod of some type and twist it 
tourniquet style to slowly draw the ends inward until they are drawn 
together enough to allow it to be attached.


Or -- you could dispense with the bail altogether (as I did) and cobble 
together some taller 'feet' for the front of the radio so that the front 
sits up about an inch or a little more above the surface upon which it 
is resting. May not be too good for portable use, but for home use on a 
desktop it works very well.


73, Dale
WA8SRA
K2 #3039

Mark Bayern wrote:

IMO, the bail is the most difficult piece of the assembly.

I used longer screws while assembling the thing and then changed them
out, carefully!, one at a time to screws of the correct length.

There were some great discussions on the forum a few years ago about
the tilt bail. Lots of different ideas about how to get the blasted
thing installed. A check of the archives might give you some ideas ...
certainly it will give you a few laughs, and you won't feel like the
only cave-man in the forum.

Mark   AD5SS
K/2  5340



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Re: [Elecraft] K2 Was Fine Now Dead?

2007-05-25 Thread Don Wilhelm

Alan,

You are reading the schematic correctly - yes there should be a 
connection between the cathode of D10 and the anode of D9 (check to be 
certain they are connected with an ohmmeter first).


If you find the path open, you could install a TEMPORARY jumper between 
D10 cathode and D9 anode on top of the board to see if everything comes 
back to life.  If that restores full function, then remove the board to 
find the damaged PC board trace or (more likely) the bad solder connection.


Nothing in your measurements indicate a bad diode to me.  A diode 
conducts positive voltage from the anode to the cathode (hint: follow 
the arrowhead on the diode symbol), but blocks a positive voltage in the 
opposite direction.


73,
Don W3FPR

Allan Bacon wrote:
I started tracing 13.8 V from the power source 


Input 13.8 V

Diode D10 Cathode 13.8 V Anode 0 to ground as per specifications 


Diode D9 Anode 0 V Cathode 0 V

So, it seems power is not getting to the D9 Diode


From the schematic on page 64, it looks as those are the only components on

the trace from power injection to the KPA-100 to the Aux 12V at J4

Here is where my lack of knowledge shows up - 


1. Since voltage is not present on either side of the diode, should I pull
the heat sink and check the trace on the board?

2. Or - Does a bad (not even sure what that means) diode prevent voltage
from showing up?

3. Or - What

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[Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread Solosko, Robert B (Bob)
Hi Elecrafters,

I just sold my big, heavy linear power supply to replace it with
a small, light weight switching supply that I can pack into a suitcase
with my K2/100. Looking at the eham.net reviews, comments on all of the
switching supplies seem to range from great, absolutely no switching
noise to noise everywhere, and everything in between. Given the
sensitivity of the K2's receiver, is power supply switching noise likely
to be more of a problem with the K2 than with some other rigs? Are there
any switching power supplies that you'd recommend that work well with
the K2 (and have little or no switching noise that the K2 would pick up)
and are there any that I should definitely avoid?

Thanks.

Bob W1SRB
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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Gary D Krause

Hi Jim,

I just put mine together last weekend.  There is quite a bit of tension with 
the bail.  In fact, my aluminum plate is bowed slightly from trying to get the 
other end of the bail fastened.  It flattened when I attached it to the K2.


Gary, N7HTS


On Thu, 24 May 2007 20:25:58 -0700 (PDT)
 Jim Murray [EMAIL PROTECTED] wrote:

Hello All,
Progress temporarily halted by (who would ever guess)
a tilt bail.  Somehow I've gone from great design and
instructions to something that reminds me of putting
toys together at Xmas Eve.  Is this for real?  Can
anyone tell me the secret.  How many people does it
take to pull on the bail while dropping in the screws?
Not sure a cave man can do it.
Jim


  
Be 
a better Globetrotter. Get better travel answers from someone who knows. 
Yahoo! Answers - Check it out.

http://answers.yahoo.com/dir/?link=listsid=396545469

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[Elecraft] ANNOUNCEMENT - QRP-ARCI HOOTOWL SPRINT

2007-05-25 Thread Jeff Hetherington
Hello Everybody!

Just a quick reminder that the next QRP-ARCI sponsored
contest is coming up this weekend on Sunday Evening. 
The HOOTOWL SPRINT runs from 8pm to midnight LOCAL
TIME to test your abilities to work through the night.

Hope to hear everybody on the air.

73/72
 Jeff - VA3JFF


DATE/TIME:

8pm to Midnight LOCAL TIME on 27 May 2007.

N.B. This contest starts at 8pm LOCAL TIME !
The calendar cannot handle local times
so it shows 2000z. Ignore it !

No matter where you are, this contest starts at your
local time 20:00 or 8pm


OBJECTIVE:

To test your ability to make contacts late into the
evening local time.

MODE:

HF CW Only.

EXCHANGE:

Members send: RST, State/Province/Country, ARCI member
number
Non-Members send: RST, State/Province/Country, Power
Out

QSO POINTS:

Member = 5 points
Non-Member, Different Continent = 4 points
Non-Member, Same Continent = 2 points

MULTIPLIER:

SPC (State/Province/Country) total for all bands. The
same station may be worked on multiple bands for QSO
points and SPC credit.

POWER MULTIPLIER:

5 Watts = x1
1 - 5 Watts = x7
250 mW - 1 Watt = x10
55 mW - 250 mW = x15
55 mW or less = x20

SUGGESTED FREQUENCIES:

160m 1810 kHz
80m 3560 kHz
40m 7030 kHz (please listen at 7040 kHz for rock bound
participants)
20m 14060 kHz
15m 21060 kHz
10m 28060 kHz

SCORE:
Final Score = Points (total for all bands) x SPCs
(total for all bands) x Power Multiplier Bonus Points.

BONUS POINTS:

If you are operating PORTABLE using battery power AND
a temporary antenna, add 5000 points to your final
score. (You can NOT be at your shack operating from
battery power using your home station antenna to
qualify for this bonus.) This is to help level the
playing field for contesters who work from the field
against contest stations with 5 element yagis at 70
ft.

CATEGORIES:

Entry may be All-Band, Single Band, High Bands
(10m-15m-20m) or Low Bands (40m-80m-160m)

HOW TO PARTICIPATE:

Get on any of the HF bands except the WARC bands and
hang out near the QRP frequencies. Work as many
stations calling CQ QRP or CQ TEST as possible, or
call CQ QRP or CQ TEST yourself! You can work a
station for credit once on each band.

LOG SUBMISSION:

Email Submission: Submit Logs in plain text format
along with a summary stating your Callsign, Entry
Category, Actual Power and Station Description along
with score calculation to [EMAIL PROTECTED] on or
before 27 June 2005.

Snail mail Submission: Submit Logs along with a
summary stating your Callsign, Entry Category, Actual
Power and Station Description along with score
calculation to:

ARCI Hoot Owl Sprint
c/o Jeff Hetherington, VA3JFF
139 Elizabeth St. W.
Welland, Ontario
Canada L3C 4M3

Entries must be postmarked on or before 27 June 2007.


RESULTS:

Will be published in QRP Quarterly and shown on the
QRP-ARCI website.

CERTIFICATES:

Will be awarded to the top scoring entrant in each
category, as well as the top scoring entrants from
each State, Province and Country. Certificates may be
awarded for 2nd and 3rd place if entries are
sufficient in a category.

=
L. Jeffrey Hetherington - VA3JFF
  QRP-ARCI (sm) Contest Manager
QRP-ARCI (sm) #9223 / K2 #3375 / KX1 #631


  Be smarter than spam. See how smart SpamGuard is at giving junk email the 
boot with the All-new Yahoo! Mail at http://mrd.mail.yahoo.com/try_beta?.intl=ca

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RE: [Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread N2TK, Tony
I have been using an Astron SS-30M with no noise difference on or off on
10-160M for my K2 and other 12V stuff. It sits about 4' away from the
equipment on a shelf under my operating position.
N2TK, Tony 

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Solosko, Robert B
(Bob)
Sent: Friday, May 25, 2007 10:04 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Switching Power Supply Recommendations Wanted

Hi Elecrafters,

I just sold my big, heavy linear power supply to replace it with
a small, light weight switching supply that I can pack into a suitcase
with my K2/100. Looking at the eham.net reviews, comments on all of the
switching supplies seem to range from great, absolutely no switching
noise to noise everywhere, and everything in between. Given the
sensitivity of the K2's receiver, is power supply switching noise likely
to be more of a problem with the K2 than with some other rigs? Are there
any switching power supplies that you'd recommend that work well with
the K2 (and have little or no switching noise that the K2 would pick up)
and are there any that I should definitely avoid?

Thanks.

Bob W1SRB
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[Elecraft] Safely Grounded (WAS: Being ESD Safe,)

2007-05-25 Thread Ron D'Eau Claire
Fred wrote:

And secondly, which now makes much sense, that no
secondary ground rods are to be used! - for one's
electrical service in the home or facility.
Multiple grounds, can create shock hazards.
And as Don pointed out - a separate ground
rod, if used at all, may be useful for one's RF
antenna system, and that is all.  But for ESD - the
single home and facility ground connection - is the
ONLY one to rely on for ESD safety.



I just went through that with an electrical contractor myself. There seems
to be a lot of contradictory information. 

As the contractor pointed out, there must be only one mains ground in a
building, but that does not mean there are no other grounds! The phone
company often installs a ground rod at their service entrance that is not
connected to the mains ground. The cable TV company may drive in a ground at
their service entrance to ground their cable. Add to that any iron water
pipe that runs into the earth to the water meter, etc., and there may be
several separate grounds in the home even without adding a grounded Ham
antenna! 

Those grounds do present shock hazards if anything goes wrong with the mains
ground or if the hot side of the mains circuit is exposed so that someone
can touch it and any grounded conductor. That's why GFI interrupters are
important in locations where secondary grounds are often encountered such as
kitchens, laundry rooms, basements, bathrooms, outlets in out buildings such
as garages, etc. 

If one grounds a Ham antenna at the at the antenna tower or mast, maybe the
shack also should have GFI protection. I don't have such a grounded system
so I haven't asked a contractor that question. 

Ron AC7AC

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[Elecraft] Re: K3

2007-05-25 Thread wayne burdick

Hi Barry,

When you access any of these functions, VFO B is used to change the 
parameter. If there are two parameters to adjust, VFO A is used as 
well.


73,
Wayne
N6KR


I have been looking at the picture of the K3 and note that there are
adjustable NR, NB and manual notch - but there doesn't seem to be any 
knob

to do the adjustment.  VFO 2 ?

Likewise there appears to be no control to put the rig into memory 
mode and

to tune the memories - just VFO - M and M-VFO.




---

http://www.elecraft.com

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[Elecraft] K3 Bandscope

2007-05-25 Thread g4ilo
With all this discussion about panadaptors for the K3 - and even people 
building SoftRock add-ons already, apparently - I have just one question. 
Since the K3 is reported to have a built-in capability to receive 
datamodes, which presumably includes some kind of waterfall display, could 
this not be developed in some future firmware release to give a bandscope 
type of display in other modes? I would be quite happy to toggle between 
the sub-VFO display and a bandscope.

Since the datamodes capability is an aspect of the K3 I'm really keen on, 
it would be nice to see a picture of the display with the radio receiving 
some PSK31, just to see what it looks like. In fact, as one of the many who 
was unable to go to Dayton, and whose first sight of a working K3 is likely 
to be when the one I ordered has been completed, it would be great to see a 
video like the one on YouTube, but of a K3 actually on the air, with 
someone going through the controls and demonstrating things like how the 
DSP works and the effect of the different roofing filters.

Julian, G4ILO
G4ILO's Shack: www.g4ilo.com


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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread Fred (FL)
To take a lead from my former ME associates back
at Kodak's CAD group - I think the Elecraft K2
bail, as designed, has too much K and is a tad
too long.  Decreasing length, ever so little in
a vise - makes the whole job and final installation
work nicely.  I think the idea of temporarily
decreasing width with a c-clamp and using LONG
screws, is wrong IMHO, as it places a permanent
spring force on the lower cabinet cover meterial
- which could cause whoknowswhat.  I can't 
imagine operating the bail, in that compression
configuration.

Bench vise adjustment - takes some mechanical
skill, but it works better after process
is done.  BAIL still operates perfectly.
Not rocket science .I suspect I decreased
bail's width, at ears, by like 1/4 (recall from
memory) 

Fred, N3CSY   K2 54xx


   
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 a vacation? Get great deals
to amazing places on Yahoo! Travel.
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Re: [Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread Lee Buller

Robert,

I have used the Astron SS-30 PS on my K2/100.  Worked fine.  Used during FD and 
everyday use.  No hash that I can detect.  I got the one without meters.  
Cheaper and available at the time

Lee - K0WA



In our day and age it seems that Common Sense is in short supply.  If you don't 
have any Common Sense - get some Common Sense and use it.  If you can't find 
any Common Sense, ask for help from somebody who has some Common Sense.  Is 
Common Sense devine?
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Re: [Elecraft] #6107 - First Snag

2007-05-25 Thread w6jd


-- Original message -- 
From: Dale Boresz [EMAIL PROTECTED] 

 One of the most clever recommendations that I remember from those 
 discussions a few years ago was to wrap a few turns of wire from one 
 bail end to another and insert a short rod of some type and twist it 
 tourniquet style to slowly draw the ends inward until they are drawn 
 together enough to allow it to be attached. 
 
I found this technique to work beautifully, no pain no strain.
Doug, W6JD
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[Elecraft] Modulation [K3]

2007-05-25 Thread Corboy-Poteet
I have a couple of questions on the K3.

1) I gather there is no agreed standard for digital voice modulation
(at the moment). AOR seems to be using an open standard that they
ascribe to G4GUO. My question is does the K3 have the capability to
internally encode/decode a protocol such as the G4GUO scheme (and
continue performing its other normal functions)? Or will it be
necessary to look to an external device such as AOR's in order to use
digital voice modulation? This question is a future feature query.

2) Amplitude modulation.  I assume that the K3 does not have a 50 watt
class A amp modulating the 100 watt finals.  I guess the K3 fully
modulates a low level stage that (with linear amplification and
mixing) drives the finals.  My question is does this provide the same
talk power as the old class C AM transmitters?  Or is the carrier to
audio envelope proportion different (compared to the classic AM
signal)?


MikeW5FTD


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[Elecraft] #6107 Now has tilt stand

2007-05-25 Thread Jim Murray
Thanks for all the help.  Used a combination.  Came up
with the Big Red method.  Sure someone has already
done it.  Only requirement is a large clamp or vise. 
Follow directions in the manual with first foot and
insert bail in that foot.  Take other foot and put the
regular screws in.  Chew some bubble gum (Big Red) and
put a little over the screw to hold them all the way
in.  Insert in vise or clamp and tighten until screws
line up and insert foot and tighten.  I used a bench
mounted wood faced carpenters vise.  The whole process
took about 5 minutes (including time to get all the
gum out).
I see there is a slight bow in the plate but will
flatten when screwed on.  Thanks again!
Jim  


   
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 customers who are looking for what you sell. 
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RE: [Elecraft] K2 Was Fine Now Dead - getting interestring?

2007-05-25 Thread Allan Bacon
Don,
Thanks for your help. When I checked for continuity between the cathode of
D10 and the anode of D9 it came up negative - problem.

So I temporarily jumped the cathode of D10 and the anode of D9 and the rig
powered up correctly.

Then I took the heat sink off and I see trouble, not sure if these are the
right words, but it is what I see.

The board between D9 via R-14, R-13, FRC-11 almost to R7 is delaminated, no
green material, just copper and there is evidence of charring.

Allan Bacon
W6GBG


-Original Message-
From: Don Wilhelm [mailto:[EMAIL PROTECTED] 
Sent: Friday, May 25, 2007 10:40 AM
To: Allan Bacon
Cc: [EMAIL PROTECTED]; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] K2 Was Fine Now Dead?

Alan,

You are reading the schematic correctly - yes there should be a 
connection between the cathode of D10 and the anode of D9 (check to be 
certain they are connected with an ohmmeter first).

If you find the path open, you could install a TEMPORARY jumper between 
D10 cathode and D9 anode on top of the board to see if everything comes 
back to life.  If that restores full function, then remove the board to 
find the damaged PC board trace or (more likely) the bad solder connection.

Nothing in your measurements indicate a bad diode to me.  A diode 
conducts positive voltage from the anode to the cathode (hint: follow 
the arrowhead on the diode symbol), but blocks a positive voltage in the 
opposite direction.

73,
Don W3FPR

Allan Bacon wrote:
 I started tracing 13.8 V from the power source 
 
 Input 13.8 V
 
 Diode D10 Cathode 13.8 V Anode 0 to ground as per specifications 
 
 Diode D9 Anode 0 V Cathode 0 V
 
 So, it seems power is not getting to the D9 Diode
 
From the schematic on page 64, it looks as those are the only components
on
 the trace from power injection to the KPA-100 to the Aux 12V at J4
 
 Here is where my lack of knowledge shows up - 
 
 1. Since voltage is not present on either side of the diode, should I pull
 the heat sink and check the trace on the board?
 
 2. Or - Does a bad (not even sure what that means) diode prevent voltage
 from showing up?
 
 3. Or - What


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[Elecraft] Tilt Stand Bail - Violin Effect

2007-05-25 Thread Fred (FL)
The 6-sided K2 Case, I propose, can be put into
a violin-case permanent pre-stressed condition,
common to many string instruments - when they
notorious Bail - is pre-stressed installed,
with the Long-Screw method.  Many installers have
noted the post-stress bowed cover plate, after
their long-screw install.  ... but it straightens
out when installed.

I propose the whole case, and any attached pcbs,
and possibly some pcb-installed components - 
all now share in that bowing process, during
long-screw installation.  Maybe the LCD display,
perhaps installed L's, possibly pcb component and
IC shorts, that mysteriously showed up only after
a few months service?

I'm sure this all sounds silly - but my
bend-bail-1/4-inch-in-a-vise method, eliminates the
distorted 6-sided K2 case condition.  Hypothesis -
let's say the
bail is pre-bent 1/2 too long, but installer used
the long-screw method and temporary compression,
to get the very long bail intalled on panel. Then
K2 builder installed this bowed panel on his or
her K2 - and in effect straightened it out supposedly
flat with body screws.  Then the entire 6-sided case,
would now be-prestressed violin-style by that original
too-long bail.  

Sounds, I know, like an April 1st entry, but I propose
we may have found one source of the problems of some
of the past strange situations that mysteriously show
up in K2's in the field.  Key jacks that mysteriously
last only a short time,  adjustments that seem too
touchy, mechanical adjustments that seem to change,
front-panel buttons that don't work correctly,
rheostat shafts that start to bind, speakers that 
seem to be distorted?, speaker coils that now bind,
component lead shorts that came out of nowhere,
  Doubt it?

Fred, FL  Snow Bird on the road north 
N3CSY Awaiting his K3 delivery 



   
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[Elecraft] Re: K3 : Rack Mount Option?

2007-05-25 Thread wayne burdick
This might be a possibility for the future, Dwight, but probably not 
this year. Of course any K3 owner is welcome to develop their own rack 
mount solution and share it with the list.


73,
Wayne
N6KR


On May 25, 2007, at 11:32 AM, Dwight wrote:

Had asked prior to Dayton, but really did not get a yea or a nay to 
the possiblity to factory rack mount kits for the K3 and options? I 
know its a field ready transceiver, but sometimes that also helps in 
making a shipping container for long trips or portable opperation 
stations.


Thoughts?



 Dwight Agnew - AI4II
 9335 King George Dr.
 Manassas, VA U.S.A.
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---

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[Elecraft] KX1 Question

2007-05-25 Thread Elliott Lawrence
I just finished the build of the various KX1 items that I purchased at the 
Viasalia DX Convention. All went well at each stage of the build from basic 
KX1+KXAT1+KXB30+KXPD1.  I am checking out the total configuration and I notice 
something now that I don't recall see earlier.  After I finish transmitting and 
the display has shown the 5/6 tick marks their is approximately a 2-3 second 
delay of blank screen before the frequency is shown again!  Is this normal?

Nice little radio but using my TH7 antenna for approximately 10db of gain to 
check it out.  Able to work guys even with the poor conditions we are 
experiencing.

73
Elliott WA6TLA
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Re: [Elecraft] Safely Grounded (WAS: Being ESD Safe,)

2007-05-25 Thread Don Wilhelm

Ron,

I believe there is a NEC requirement that all grounds be connected 
together.  I have a perimeter ground around my house with an 8 ft. 
driven ground rod at every corner (total of 10), and all are connected 
with a #4 bare solid wire.  The wire is also connected to the utility 
ground rod.  This ground is then connected to the extensive grounding 
system in the antenna field which grounds all towers and masts.  All 
feedlines into the shack are protected by 2 Polyphaser suppressors (one 
at the antenna field.  All wiring into the shack area (power, telco, 
ethernet, and antennas) enter through a grounded copper panel and are 
surge protected there.  I should have little ground potential difference 
in the shack area because of this 'single point grounding window'.


If I do get a lightning surge, I trust (hope) that surge will be more 
gradually dissipated in the extensive ground system since it will 
attempt to spread the surge out over about an acre of land (yes, I used 
LOTS of wire), but I still do not operate with storms in the vicinity.


The real point relevant to the prior discussion is that *all* my grounds 
are tied back to the utility ground entry point.


As a second note, I know the building inspectors (at final inspection 
time) in this area do check with those little 'hardware store checkers' 
to make certain that the receptacles are wired properly.  It is also 
common for a used home buyer to hire an inspector who will check all the 
receptacles in the house for proper wiring.  While that practice may not 
be universal, one can do his own check on the house wiring with a $10 
device from the hardware (or DIY) store.


73,
Don W3FPR

Ron D'Eau Claire wrote:

Fred wrote:

And secondly, which now makes much sense, that no
secondary ground rods are to be used! - for one's
electrical service in the home or facility.
Multiple grounds, can create shock hazards.
And as Don pointed out - a separate ground
rod, if used at all, may be useful for one's RF
antenna system, and that is all.  But for ESD - the
single home and facility ground connection - is the
ONLY one to rely on for ESD safety.



I just went through that with an electrical contractor myself. There seems
to be a lot of contradictory information. 


As the contractor pointed out, there must be only one mains ground in a
building, but that does not mean there are no other grounds! The phone
company often installs a ground rod at their service entrance that is not
connected to the mains ground. The cable TV company may drive in a ground at
their service entrance to ground their cable. Add to that any iron water
pipe that runs into the earth to the water meter, etc., and there may be
several separate grounds in the home even without adding a grounded Ham
antenna! 


Those grounds do present shock hazards if anything goes wrong with the mains
ground or if the hot side of the mains circuit is exposed so that someone
can touch it and any grounded conductor. That's why GFI interrupters are
important in locations where secondary grounds are often encountered such as
kitchens, laundry rooms, basements, bathrooms, outlets in out buildings such
as garages, etc. 


If one grounds a Ham antenna at the at the antenna tower or mast, maybe the
shack also should have GFI protection. I don't have such a grounded system
so I haven't asked a contractor that question. 


Ron AC7AC

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Re: [Elecraft] K2 Was Fine Now Dead - getting interestring?

2007-05-25 Thread Don Wilhelm

Allan,

Fine that you found it - somewhere along the line, the base K2 was 
drawing excessive current and the trace acted like a fuse.  I can't say 
what the original problem was - maybe the power connector was plugged in 
backwards, or something 'dumb' like that.


In any case, it is a simple matter to remove the delaminated PC board 
trace and any charred material then repair it with wire.  I would 
recommend that you use #20 or larger wire for that replacement trace (or 
use 2 pieces of #22 side by side).  If you use bare wire, you can dress 
it along the old path and encapsulate it in a small bit of epoxy which 
will also glue the wire down to the board - it will be just as good as 
new (you can even color it green with a permanent marker and few folks 
will spot the repair).


73,
Don W3FPR

Allan Bacon wrote:

Don,
Thanks for your help. When I checked for continuity between the cathode of
D10 and the anode of D9 it came up negative - problem.

So I temporarily jumped the cathode of D10 and the anode of D9 and the rig
powered up correctly.

Then I took the heat sink off and I see trouble, not sure if these are the
right words, but it is what I see.

The board between D9 via R-14, R-13, FRC-11 almost to R7 is delaminated, no
green material, just copper and there is evidence of charring.


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RE: [Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread Craig D. Smith
Bob, if you're looking for something to put in a suitcase, I would highly
recommend the Gamma HPS-1.  It is VERY small and light and works well with
the K2 up to 100W.  It is a switching supply with an internal supercap to
handle dynamic loads.  No RF noise that I can hear and also acoustically
quiet.  I really like mine.

Check it out at www.gammaresearch.com

73
 ... Craig  AC0DS

Craig D. Smith
PowerSmith Consulting
1009 Alder Way
Longmont, CO  80503
phone:  303-678-7958
email:  [EMAIL PROTECTED]
web:  www.PowerSmithConsulting.com
 

 -Original Message-
 From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
 On Behalf Of Solosko, Robert B (Bob)
 Sent: Friday, May 25, 2007 8:04 AM
 To: elecraft@mailman.qth.net
 Subject: [Elecraft] Switching Power Supply Recommendations Wanted
 
 Hi Elecrafters,
 
  I just sold my big, heavy linear power supply to replace it with
 a small, light weight switching supply that I can pack into a suitcase
 with my K2/100. Looking at the eham.net reviews, comments on all of the
 switching supplies seem to range from great, absolutely no switching
 noise to noise everywhere, and everything in between. Given the
 sensitivity of the K2's receiver, is power supply switching noise likely
 to be more of a problem with the K2 than with some other rigs? Are there
 any switching power supplies that you'd recommend that work well with
 the K2 (and have little or no switching noise that the K2 would pick up)
 and are there any that I should definitely avoid?
 
  Thanks.
 
 Bob W1SRB
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Re: [Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread Ken N9VV

I think this might be the link you wanted
http://www.gammaresearch.net/hps-1a.html
de ken n9vv

Craig D. Smith wrote:

Bob, if you're looking for something to put in a suitcase, I would highly
recommend the Gamma HPS-1.  It is VERY small and light and works well with
the K2 up to 100W.  It is a switching supply with an internal supercap to
handle dynamic loads.  No RF noise that I can hear and also acoustically
quiet.  I really like mine.

Check it out at www.gammaresearch.com

73
 ... Craig  AC0DS

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[Elecraft] A couple of K3 Questions which kinda got lost

2007-05-25 Thread Toby Deinhardt

Hi Wayne,

a while before Dayton I asked and, with the amount stress you guys were 
in, understandably, didn't get an answer  either that or I missed 
your answer.



1) A friend of mine with a big 160m station killed his RX front end 
because too much power was coming back on his beverages and the rig's RX 
antenna input was not grounded / disconnected during transmission by the 
transceiver.


Are the K3 antenna inputs which might be used for RX only antennas 
protected against too much power coming back via the RX antenna?



2) At our contest QTH when we work multi between some of the antennas we 
also have a lot of power coming back - roughly 20W in the worst case 
combination of beams and bands (without the extra band passes).


How strong is the RX front end of the K3? How much power can it handle 
without releasing its smoke?



 Does anyone know what the current ETA of the K3 manual is?
 Late June at the earliest, Michael.

Need any proof reading done? ;-) ;-) ;-)


vy 73 es have a nice weekend,

toby
--
DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz)
K2 #885, K2/100 #3248
K3/100 #??? ( #200)
DOK C12, BCC, DL-QRP-AG
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Re: [Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread Bruce Bowman
Craig-

Are you sure about this link? Gamma Research seems to be a s/w house.

Bruce, NM5B
Santa Fe, NM

- Original Message - 
From: Craig D. Smith [EMAIL PROTECTED]
To: Elecraft@mailman.qth.net
Sent: Friday, May 25, 2007 2:16 PM
Subject: RE: [Elecraft] Switching Power Supply Recommendations Wanted


 Bob, if you're looking for something to put in a suitcase, I would 
 highly
 recommend the Gamma HPS-1.  It is VERY small and light and works well 
 with
 the K2 up to 100W.  It is a switching supply with an internal supercap 
 to
 handle dynamic loads.  No RF noise that I can hear and also 
 acoustically
 quiet.  I really like mine.

 Check it out at www.gammaresearch.com

 73
 ... Craig  AC0DS
 

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RE: [Elecraft] K3 Bandscope

2007-05-25 Thread Greg
Julian.  THere is no waterfall display on the K3.  Part of the S-meter is
used for tuning CW, PSK and RTTY.  When you are tuned in and with text
decode ON, the VFO B display then shows scrolling text of the decoded
signal.

73
Greg
AB7R


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
Sent: Friday, May 25, 2007 8:48 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 Bandscope


With all this discussion about panadaptors for the K3 - and even people
building SoftRock add-ons already, apparently - I have just one question.
Since the K3 is reported to have a built-in capability to receive
datamodes, which presumably includes some kind of waterfall display, could
this not be developed in some future firmware release to give a bandscope
type of display in other modes? I would be quite happy to toggle between
the sub-VFO display and a bandscope.

Since the datamodes capability is an aspect of the K3 I'm really keen on,
it would be nice to see a picture of the display with the radio receiving
some PSK31, just to see what it looks like. In fact, as one of the many who
was unable to go to Dayton, and whose first sight of a working K3 is likely
to be when the one I ordered has been completed, it would be great to see a
video like the one on YouTube, but of a K3 actually on the air, with
someone going through the controls and demonstrating things like how the
DSP works and the effect of the different roofing filters.

Julian, G4ILO
G4ILO's Shack: www.g4ilo.com


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RE: [Elecraft] K3 datamodes decoding to CW?

2007-05-25 Thread Greg
Matti,

This is not a feature in the current firmware but its being put on the
feature list for future updates.

73
Greg
AB7R


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Marteinn
Sverrisson
Sent: Friday, May 25, 2007 7:53 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 datamodes decoding to CW?


Hi

I have one question regarding the Data modes decoder on K3,
can it send the decoded message to the speaker using Morse code, as
well as displaying the text on the LCD?

73, Matti, TF3MA
--
   Marteinn SverrissonTF3MA
  Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is
270 Mosfellsbær   http://www.raunvis.hi.is/~tf3ma
   Iceland
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[Elecraft] Elecraft Linear Amplifiers

2007-05-25 Thread Howard W. Ashcraft
I have searched the reflector for information regarding the status of the 
Elecraft linear amplifiers without any responsive hits.  What is the current 
status?

HOWARD W. ASHCRAFT, Jr.
Direct Dial: (415) 995-5073
[EMAIL PROTECTED] 
HANSON  425 Market Street, 26th Floor
BRIDGETTSan Francisco, CA 94105-2173
MARCUS  Direct: (415) 995-5073
VLAHOS  Main: (415) 777-3200
RUDY, LLP   Fax: (415) 995-3460 






*
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protected by privilege.  If you are not the intended recipient, any use, 
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immediately notify the sender by telephone or email, and permanently delete all 
copies, electronic or other, you may have.

To ensure compliance with requirements imposed by the IRS, we inform you that 
any tax advice contained in this communication (including any attachments) was 
not intended or written to be used, and cannot be used, for the purpose of (i) 
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[Elecraft] K3 front-end protection

2007-05-25 Thread wayne burdick

Hi Toby,

[NOTE: I'm so busy that I'm answering about one e-mail a day, now, and 
yours is it  :)  Normally someone else will answer, or the answers will 
end up in the FAQ later on.]



1) A friend of mine with a big 160m station killed his RX front end 
because too much power was coming back on his beverages and the rig's 
RX antenna input was not grounded / disconnected during transmission 
by the transceiver.


Are the K3 antenna inputs which might be used for RX only antennas 
protected against too much power coming back via the RX antenna?


All antenna ports have gas-discharge tubes, and the RX-only ports also 
have carrier-operated relays.


We also monitor the SWR bridge in receive mode (forward/reflected 
power). If a signal large enough to cause front-end damage appears in 
the main T-R path (a reverse transmit condition), we quickly open the 
PIN diode path to the receiver, typically in less than 1 ms. The path 
will recover equally fast when the huge external signal disappears. 
Obviously this situation is to be avoided, which is why such stations 
often use external band-pass filters.



2) At our contest QTH when we work multi between some of the antennas 
we also have a lot of power coming back - roughly 20W in the worst 
case combination of beams and bands (without the extra band passes).


How strong is the RX front end of the K3? How much power can it handle 
without releasing its smoke?


See above. At a certain power level the RX path will be opened (and the 
audio muted) to avoid exposing the preamp, mixer, and down-stream 
stages to multi-watt signals.


73,
Wayne
N6KR

---

http://www.elecraft.com

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RE: [Elecraft] Switching Power Supply Recommendations Wanted

2007-05-25 Thread Craig D. Smith
Sorry, Bruce - it should be www.gammaresearch.net

73
 ... Craig




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FW: [Elecraft] KX1 Question

2007-05-25 Thread Werner Denise Haschke
Hi Elliott

Mine has done that all along so I assume it's the norm. All is working fine,
just need the band to open up a bit.
I put the 80-30 mod on mine, also like the paddles even though some say they
don't.
Very sweet little radio.

Werner   N8BB

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Elliott Lawrence
Sent: Friday, May 25, 2007 3:58 PM
To: Elecraft List
Subject: [Elecraft] KX1 Question


I just finished the build of the various KX1 items that I purchased at the
Viasalia DX Convention. All went well at each stage of the build from basic
KX1+KXAT1+KXB30+KXPD1.  I am checking out the total configuration and I
notice something now that I don't recall see earlier.  After I finish
transmitting and the display has shown the 5/6 tick marks their is
approximately a 2-3 second delay of blank screen before the frequency is
shown again!  Is this normal?

Nice little radio but using my TH7 antenna for approximately 10db of gain to
check it out.  Able to work guys even with the poor conditions we are
experiencing.

73
Elliott WA6TLA
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[Elecraft] KPA-100 Problem

2007-05-25 Thread KJ3D
Good evening Group,

I seem to be having some trouble with my KPA-100.  (K2 serial 4991),
Perhaps one of you could shine a light where mine don't reach.

Assembly and initial checks went OK. 

At the end of the assembly, I ran into the problem.

Checks on page 46:

Junction of C77 and R11 says 90 to 150 V,  I get 11.6 V

U4 pin 8 says -5 to -25 V, I get 2.8 mV

I have rechecked T3 and all looks well.  I was careful with D1 - D8 as I
knew they would be hard to check after assembly.

Any suggestions before I take the rear panel and heat sink off?  (shudder).

FWIW:  Since the smoke wasn't getting out, I went ahead with the checks on
page 46 and the first one on page 47 and all went well, but that's probably
inconsequential.  I'm sure the problem must be in the bias supply.

Thanks,

Tom, kj3d

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[Elecraft] Re: [ Elecraft] Switching Power Supply Reccomendations Wanted

2007-05-25 Thread Ron

Craig,
 The old SMPS/linear supply finer points have been around a while,
and while I use a switcher here on one set with what I perceive to be no
switching noise at all, it is a different story if I re-locate to a beach
house we have where the ambient noise is virtually zero. There, the SMPS
difinitely has a low level of noise mainly on the lower bandsthat
manifests itself as a low level mobile rasping that drifts around slowly
every few khz . At home I would swear it was clean.( and I have a quiet
location for all intents and purposes)
However, the small amount of switching noise doesn't worry me for the short
times I am portable, and the convenience of not putting an arm out of joint
carrying around a transformer derived supply far outweighs any noise I
encounter.   Having said that, if you want completely noise free operation,
then the linear supply will win hands down.
I have used home made switchers that I have put a lot of effort into trying
to get absolutely clean and never 100% achieved that goal. I eventually
fell back on MFJ switchers, which I find as good as any, and there is a $99
model that is small, light and very portable, and probably as clean as you
will get in a switching supply. There will be others on the market much the
same ( Samlex?)
To round upyou can't beat the switchers for portability and
convenience, but buy a Brand name model. In most suburban or density
locations you probably won't notice any noise.
However if you are going portable where man made noise doesn't exist, the
Linear supply, or batteries will win out every time.  It's the old story of
YMMV.
Cheers..Ron ZL1TW


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[Elecraft] K3 Tools / Manual

2007-05-25 Thread Edward Dickinson III
Hopefully the manual will include a list of necessary tools.


Regards,
Dick - KA5KKT/4

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RE: [Elecraft] KPA-100 Problem

2007-05-25 Thread Mike Heitmann
Tom,

I hate to admit this, but I had a similar problem when I built my KPA100. 

The reason I hate to admit it is after troubleshooting, I found that I had
installed Q6, Q7  (the two odd shaped FETs) backwards. To make matters
worse, I broke a lead on one removing it to turn it around and ended up
ordering replacements from Elecraft, which delayed the completion of the amp
by several days.

Hope this helps!

73 de Mike, N0SO
K2 #4757


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of KJ3D
Sent: Friday, May 25, 2007 5:10 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA-100 Problem


Good evening Group,

I seem to be having some trouble with my KPA-100.  (K2 serial 4991), Perhaps
one of you could shine a light where mine don't reach.

Assembly and initial checks went OK. 

At the end of the assembly, I ran into the problem.

Checks on page 46:

Junction of C77 and R11 says 90 to 150 V,  I get 11.6 V

U4 pin 8 says -5 to -25 V, I get 2.8 mV

I have rechecked T3 and all looks well.  I was careful with D1 - D8 as I
knew they would be hard to check after assembly.

Any suggestions before I take the rear panel and heat sink off?  (shudder).



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[Elecraft] Elecraft Linear Amplifiers

2007-05-25 Thread Gary Hvizdak
Howard writes ...

I have searched the reflector for information regarding the status of the 
Elecraft linear amplifiers without any responsive hits.  What is the current

status?

--

Howard, In his message on Monday April 30 Wayne wrote ...

The KPA800/1500 amplifiers will work with any rig, including the K2 and K3.
These have been delayed because of the K3 release, but we'll keep everyone
informed of progress.

See
http://www.ac6rm.net/mailarchive/html/elecraft-list/2007-04/msg01239.html
for the complete text of Wayne's post.

73,
Gary, KI4GGX

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Re: [Elecraft] Dead K2-now lives!

2007-05-25 Thread Kristina Wright
Many thanks to all who replied to my question. What happened was that  
while I was putting T4 on, I overheated the 7-8 winding and it melted  
through the insulation of the 3-4 winding, therefore shorting it. So  
I just rewound it and it works!

Thanks again!

73,
Kristina  KE7LUC
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Re: [Elecraft] K3 Tools / Manual

2007-05-25 Thread Bob Nielsen

On May 25, 2007, at 4:49 PM, Ken Kopp wrote:


At one time there was mention of a Phillips screwdriver being
the only tool required.

If one needs a list of required tools to go buy 'em in preparation
for the task I wonder if one should be undertaking the task. (:-))
I suppose there might be a ham w/o tools . naah, doubt it. (:-))

73! Ken Kopp - K0PP
[EMAIL PROTECTED]



Maybe someone about to leave the ranks of the QCAO!

73 - Bob, N7XY

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Re: [Elecraft] Re: K3 : Rack Mount Option?

2007-05-25 Thread K4tmc

Maybe the forthcoming K3 power supply and external speaker can be combined 
into a single box that can be attached to either side of the K3; thus making th
e 
package the right width for the addition of some rack mount side plates.

73,
Henry - K4TMC
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[Elecraft] Weller temp setting for KX1 build

2007-05-25 Thread Koaps
Hi Guys,

I'm getting ready to start in on my KX1 build but one
thing I'm a bit stuck on is the setting for my new
Weller WES51 solder station.

Can anyone using one of these things suggest how I get
the temp right?

I read the manual that came with it, but it really
didn't make much sense to me, and I thought it would
come with something that says set the dial here for
this temp.

I did get a roll of Kester 44 solder, .020, that was
suggested in the solder guide, I'm just not sure what
setting to use on the dial.

Thanks for the help,
-Chris


   
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Re: [Elecraft] Weller temp setting for KX1 build

2007-05-25 Thread Don Wilhelm

Chris,

I find a setting of 700 degrees F about right for me.

An even better indication is to see how long it takes for solder to 
flow.  If you can achieve a good solder connection in 2 to 3 seconds, 
that is about the right temperature.  If it takes longer for the solder 
to flow out to a nicely tapered edge where the solder edge is almost 
invisible on both the solder pad and the component lead, then your 
temperature is too low - if the solder flows in 1 second or less, then 
the iron is too hot.


Take a look at the soldering tutorial on the Elecraft website Builder's 
Resource page to see what a good solder connection looks like.


73,
Don W3FPR


Koaps wrote:

Hi Guys,

I'm getting ready to start in on my KX1 build but one
thing I'm a bit stuck on is the setting for my new
Weller WES51 solder station.

Can anyone using one of these things suggest how I get
the temp right?

I read the manual that came with it, but it really
didn't make much sense to me, and I thought it would
come with something that says set the dial here for
this temp.

I did get a roll of Kester 44 solder, .020, that was
suggested in the solder guide, I'm just not sure what
setting to use on the dial.

Thanks for the help,
-Chris

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Re: [Elecraft] K3 Tools / Manual

2007-05-25 Thread Eric Swartz - WA6HHQ, Elecraft

Clarification - LESS tools than required for the K2 :-)

No soldering iron is required at this point and probably just an 
assortment of screwdrivers, small pliers, DVM etc.


We'll post a more complete tool list as we get closer to production.

73, Eric


Eric Swartz - WA6HHQ, Elecraft wrote:

The same as required for the K2.

73, Eric
---

Edward Dickinson III wrote:

Hopefully the manual will include a list of necessary tools.


Regards,
Dick - KA5KKT/4

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RE: [Elecraft] Weller temp setting for KX1 build

2007-05-25 Thread Brett gazdzinski
 
I built all my elecraft stuff with the soldering iron set at about
630-660F.
Bigger parts needed more heat, but for almost everything small, 
and the .020 solder, that heat was enough to give a nice solder
connection.

I had zero solder problems on all my stuff.

Brett
N2DTS

  Hi Guys,
  
  I'm getting ready to start in on my KX1 build but one
  thing I'm a bit stuck on is the setting for my new
  Weller WES51 solder station.
  
  Can anyone using one of these things suggest how I get
  the temp right?
  
  I read the manual that came with it, but it really
  didn't make much sense to me, and I thought it would
  come with something that says set the dial here for
  this temp.
  
  I did get a roll of Kester 44 solder, .020, that was
  suggested in the solder guide, I'm just not sure what
  setting to use on the dial.
  
  Thanks for the help,
  -Chris
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Re: [Elecraft] Weller temp setting for KX1 build

2007-05-25 Thread Koaps
Thanks Don and Brett,

Just the bit of info I needed.

Thanks again for the help, I'm really excited about
building my KX1. I spend some extra money to make sure
nothing goes wrong with ESD(I got a mat, wrist strip,
and Monster surge protector with coax hookups, I
figured I could use it to ground me and the mat and
have ground fault protection for the soldering
station). I also  got a nice panavise to help with
soldering/desoldering.

I hope to start in on the build tomorrow, only thing I
lack is a dummy load, but I might be able to borrow
that from a friend.

Thanks again for the help,
-Chris


   
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FW: [Elecraft] K3 Tools / Manual

2007-05-25 Thread Edward Dickinson III
Hi Ken and Bob...perhaps others. 

It occurred to me that when some order a K3, some might want to have their
tools ready and an appropriate area prepared awaiting its arrival.  Some
wouldn't want to find themselves at midnight not recalling where they had
last stored a perhaps required appliance.  Of course, that wouldn't happen
to a well organized ham.

And, really guys...  I forgive your knee-jerk, gangsterish attempts to
belittle and negate on this public reflector as I realize they are part of a
life script that won't change.  

Heck...who needs QCAOers..?


Regards,
Dick - KA5KKT/4


-Original Message-
Hopefully the manual will include a list of necessary tools.


Regards,
Dick - KA5KKT/4

-Another Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ken Kopp
Sent: Friday, May 25, 2007 7:50 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 Tools / Manual

At one time there was mention of a Phillips screwdriver being the only
tool required.

If one needs a list of required tools to go buy 'em in preparation for the
task I wonder if one should be undertaking the task. (:-)) I suppose there
might be a ham w/o tools . naah, doubt it. (:-))

73! Ken Kopp - K0PP
[EMAIL PROTECTED]

-Yet Another Original Message-

Maybe someone about to leave the ranks of the QCAO!

73 - Bob, N7XY

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[Elecraft] K3 Phase locked Receivers

2007-05-25 Thread Craig ...
Anyone know if its going to be possible to phase lock
the 2 k3 receivers?


Craig
VK3HE


   
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[Elecraft] K3 Equalizer/Noise gate?

2007-05-25 Thread Craig ...
Does the K3 have a Noise Gate feature integrated into
the  microphone  equalizer? I ask this question not
from a ESSB perspective, I just have a noisy blower!

Craig
VK3HE





   
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[Elecraft] Re: K3 Phase locked Receivers

2007-05-25 Thread wayne burdick

They run off the same reference oscillator and are phase locked.

73,
Wayne
N6KR

On May 25, 2007, at 8:34 PM, Craig ... wrote:


Anyone know if its going to be possible to phase lock
the 2 k3 receivers?



---

http://www.elecraft.com

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