I have been doing some circuit checking and it appears that D13 has open
-circuited; I will replace it and see if that makes it work.
--
David Dawson
The greatest dangers to liberty lurk in insidious encroachment by men
of zeal, well-meaning but without understanding.
-- Justice
Hi David
Are you sure you wired the test probe connector (the white plastic thingy)
correctly? I made the mistake of swapping the wires in the connector and the
result was exactly as you described.
Check the drawing of the connector in the manual carefully to see you didn't
swap the braid and
Hey Scott,
Maybe you *should* put that unopened kit on e-bay! You could instead
buy another rig that is a true black box. One that you can't get inside
of to fix and one that has a lower reliability rate. Something less
mature with more issues. And you'd get to spend more money in the
Scott
I bought my K2 kit last winter just because I wanted the enjoyment of building
it. I have several radios in my shack, so I didn't need another. After I
finished building the kit, I had a chance to do an A/B comparision with the K2
and my other rigs. The K2 is head-and-sholders above
Dear group!
We have a serious problem with our 10watt PA of my K2.2 weeks ago the 10w PA
suddenly didn´t work any more.A friend helped me to fix the problem(we replaced
the PA transistors 3 times), but now we need your help.The PA needs far too
much current and the maximum power output on all
Scott,
The basic K2 KSB2 have no mods since the Serial number approx. 4000.
The S/N now is approaching 6000.
Elecraft is the only supplier of ham gear that I am aware of that has
the guts to tell their customers about improvements they
have made to their products and make the mods available
Scott,
I am a new ham that just got back into radio after a 30 some year hiatus. I
like you joined the reflector about the same time I purchased the kit. I did
however spend about two years looking at the K2 and Elecraft in general
before making my purchase decision. After reading many favorable
I've got a W3EDP at our vacataion QTH. The current setup is very temporary;
the wires come together at a nice spot on the upstairs patio where I
hook up to my KX1.
But winter is coming and I want to feed the signals inside. I have a nice
steel box and DPDT knife switch to act as ground
Hi Kevin,
How did battery ops go? I listened for you here in FL, whilst building the
front panel board of the K2,but 40M appeared too long for stateside. Didn't
even hear Tom (N0SS). Macedonia, however, was not too much of a problem.
I'll look for you guys again next week.
73s,
Pete
wd4lst
K1
Scott
I bought my K2 kit last winter just because I wanted the enjoyment of building
it. I have several radios in my shack, so I didn't need another. After I
finished building the kit, I had a chance to do an A/B comparision with the K2
and my other rigs. The K2 is head-and-sholders above
Hello All,
After building almost every option that will fit into the K2 and having
everything working great the first time, I finished the KPA100 over the weekend
(after getting beyond the in-line fuse problem), and in the process, broke
something in the K2.
The KPA100 checked
Scott--
Unpack the box and build the kit; you'll be glad you did.
Your posting included excellent questions posed by many first-time
Elecraft builders, and it's provided an opportunity for the Elecraft
community to assure you you've made a wise purchase.
I was the perfect example of a
Hi Folks:
I had a 'biological emergency' which required me to be away from the
shack for the first 15 minutes of the ECN 40M net. By the time I did
manage to get into the shack... all was deathly quiet!
I called ECN ? several times and only (eventually) got a reply
from Mike, W3MC, who
Thanks to those who replied directly about the MH2.
I took the mic apart and couldn't see anything wrong so rechecked the
sideband balance. Today I'm getting good reports with the MH2.
73, Dave NE5DL
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Hi all,
I'm an EE but with little RF design background - I've spent most of my career so
far doing digital design software development. So while I remember how to
bias a transistor you probably don't want me to design a radio for you just yet!
:-)
With that in mind, I'd love recommendations
Experimental Methods in RF Design is an excellent starting place. The book
is very well done.
Doug -- KØDXV
Mike Markowski wrote:
Hi all,
I'm an EE but with little RF design background - I've spent most of my career so
far doing digital design software development. So while I remember
Mike,
You might take a look at The Electronics of Radio, written by Prof.
David Rutledge of Caltech. It's a 400-page lab coursebook for their
EE-20 class by the same name, available in hardcover from Amazon.
It uses the NorCal 40A transceiver (one of my earlier designs, still
available as a
I believe someone sent me email today regarding a problem I had with failure of
the RS232 in my KPA100 some time ago. I inadvertently deleted the email before
getting a return address or name.
For that person:
The problem I had turned out to be three of the tiny RF chokes plus the MAX
chip
Hi Guys,
I am reading a book called I WOZ the biog of one of the
founders of Apple Computers. It's a great read!. He mentions having a Ham
licence in his 6th grade (not sure how old that would make him). Seemingly
he read a book called SOS at midnight which got him hooked and then
Hi Doug,
When I was a younger old man, Ulrich Rhode (Rhode and Schwartz Instruments) and
a collaborator wrote Communications Receivers: DPS, Software Radios, and
Design, 3rd Edition. I would recommend this book most highly for an EE. It
gets highly technical in spots.
Good luck,
Bill
NA7Y
On 11/13/06, wayne burdick [EMAIL PROTECTED] wrote:
Another must-have for pragmatic design (which definitely applies to RF)
is Solid State Design for the Radio Amateur, a classic by Hayward and
DeMaw. This is available from Elecraft (as is EMRFM, I believe).
Unfortunately _Sold State Design
test
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Help:
Hi Mike,
When I was a younger old man, Ulrich Rhode (Rhode and Schwartz Instruments) and
a collaborator wrote Communications Receivers: DPS, Software Radios, and
Design, 3rd Edition. I would recommend this book most highly for an EE. It
gets highly technical in spots.
Good luck,
Bill
NA7Y
Chris, K6DBG wrote:
But winter is coming and I want to feed the signals inside. I have a nice
steel box and DPDT knife switch to act as ground disconnect. I bought
some electric fence spark gaps to provide some lightning protection.
I was planning to 1M 1/2W resistors across the gaps as a bleed
I found two callsigns: WA6BND and WV6VLY. These were mentioned on various
Web sites as having once belonged to Woz. I couldn't find either one in the
FCC or QRZ databases, nor could I find an expired license for Woz in the FCC
database.
You might try writing through www.woz.org. It would be an
On Nov 13, 2006, at 11:14 AM, Stephen wrote:
Hi Guys,
I am reading a book called I WOZ the biog of one of the
founders of Apple Computers. It's a great read!. He mentions having
a Ham
licence in his 6th grade (not sure how old that would make him).
Seemingly
he read a book
I have been trying to find that answer myself for a great while.
Woz is a hard man to tie down it seems, the ARRL has been trying since 2001
to get a story out of him about his early Ham Radio Experiences.
--
John
N5BSD
www.n5bsd.com
Grid:EM12lr
From: Stephen [EMAIL PROTECTED]
Date:
I don't recall Hallicrafters ever selling kits.
SX140 and HT40 were available as Halli-kits in the late 1960s.
Lyle KK7P
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Scott,
I have recently built the basic K2, noise blanker, antenna tuner, DSP
and SSB unit.
All worked the first time. I am still impressed by the design of the
kit, absolutely wonderful. There were some modifications necessary when
I put in the SSB unit. On the other hand, the mods were very
John [N5BSD] wrote:
I have been trying to find that answer myself for a great while.
Woz is a hard man to tie down...
But, as it turns out, easy to dunk. I saw the great Woz being summarily
soaked at the dunk-the-nerds booth at the Maker Fair in San Mateo last
summer. I had a few questions
I Googled:
Steve Wozniak ham radio callsign
and found this: http://www.wired.com/wired/archive/13.07/solar.html
It says his call is WA6BND. However, QRZ.com says that call is not
currently assigned, so either that's the wrong call or he let it lapse.
73,
Jeff
WB5GWB/AE
Long Island, NY
Google is our friend. Woz held the call WA6BND, since lapsed and his novice
call was WV6VLY.
Reference: http://users.tellurian.net/gjurrens/famous_hams.html
Joe N9JR
- Original Message
From: wayne burdick [EMAIL PROTECTED]
To: John [N5BSD] [EMAIL PROTECTED]
Cc:
K2 for sale with both qrp top and kpa100 with all options included except
microphone and KAF cw filter has the DSP instead. Kat100 tuner also included,
has all manuals power cords and computer cable assemblys. Mint condition.
Asking $1200 shipping included.
WT5Y
john cooper
My new K2 is well underway - Any mods that I should consider before
getting too far in? I'm ok with 2.4khz ssb bandwidth. To me, that's
perfect. I will add the ssb adapter and eventually the KPA100.
tnx es 73, Doug -- KØDXV
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Hi Scott,
I think 90% of what are reading is guys who are very enthusiastic about their
K2's and guys who like to fiddle around with things. After all if you build
the rig yourself you have a certain comfort level about going inside and poking
around (which, at least as far as I'm
Date: Mon, 13 Nov 2006 14:23:27 -0500
From: michael taylor [EMAIL PROTECTED]
Unfortunately _Sold State Design for the Radio Amateur_ is out of
print - look for it at hamfests, partly because it was getting fairly
dated in particulars, so _Experimental Methods_ grow out of being an
Hi all:
This afternoon I received the KPA100UPKT package in the mail to upgrade
my KPA100 to the latest version, Rev D. MY KPA100 is a fairly recent one
so some of the upgrade steps did not apply. Keep in mind that this
Upgrade package includes all changes since the KPA100 was introduced.
Keith,
I did add the Rework Eliminators when I built the K2, and it made
adding all of the internal options a breeze (KDSP2, KNB2, K160RX, KSB2 and now
the KPA100) - I highly recommend them when building a K2. The problem I
encountered with the KPA100 was my own inattentiveness when
Most EE Schools went way off the deepend, giving
and creating courses in Digital design. I would think
a course in Fourier Transforms, S-plane, and all that
would be a good adjunct. Most IC designers of late -
are just learning what R/L/C parasitics can do to a
IC design (physical silicon
Hi,
My SSB module worked fine before. I add my kpa100 and every test went well.
I test my kat100 and every test went well until I did the last test with the
dummy load. Now my Mic is sending a tone. No more voice. But the power still
there.
Is any body had this probleme?
Best regard and best
What are the specific incremental upgrade changes to go from C to D? My amp is
revision C so if I wanted to make only those changes, what needs to change to
make it a D? The amp runs just fine as built
73
Elliott WA6TLA
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Are you still in SSB mode or perhaps did the MODE button get bumped to put
you in CW mode??
Ron AC7AC
-Original Message-
Hi,
My SSB module worked fine before. I add my kpa100 and every test went well.
I test my kat100 and every test went well until I did the last test with the
dummy
Frank,
You left out an important piece of information. Was the K2 plugged into an
antenna at the same time you had it on the computer and lost the MAX chip
and the components?
RS232 used to cause a lot of modem failures, because those chips make a
great fuse for lightning surges that would
Hi Elliot:
I would recommend that you download the instructions from the Elecraft
website and review them. Also, if your amp runs fine as built, then you
perhaps you might not want to upgrade to Rev D.
73,
Ken K3IU
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Go to the Elecraft web site (www.elecraft.com) and, under Manuals and
Downloads get KPA100UPKT.PDF It'll show you exactly what changed.
As Wayne observed in an earlier post here, it's not needed if your KPA100 is
working FB.
Ron AC7AC
-Original Message-
What are the specific
The KDSP2 has been sold.
- Original Message -
From: Brent Sutphin [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Sunday, November 12, 2006 10:10 PM
Subject: [Elecraft] KDSP2 FS or Trade
I have a KDSP2 that I built last spring. It is currently installed in my
K2 and works
Stuart, K5KVH, reminds me that I left out an important point concerning my
RS 232 problem -- i.e. was it connected to an antenna as well as the
computer
when the failure occurred?
Yes, it was connectied to an antenna, Stuart -- the antenna is a Butternet
vertical on the roof with a couple
of
Ken, I have to respectfully disagree that properly sized resistors would
mess up the tuning of the antenna and feeders.
Our radio club has operated up to 5 transmitters at Field Days, with 100,000
ohm, 2 watt carbon resistors on the 450 ohm feeders, one from each side to a
ground rod to bleed
Scott,
Not to worry - Your recently ordered K2 contains all the latest
modifications - and if ordered after the 2nd week of September, a KPA100 kit
has the latest update included too. All you need to do is follow the
instructions in the manual(s).
Elecraft has incorporated all the desirable
Hi folks,
Spoke with Kevin today. Looks like he will be without power for at least
another day, but Sam and Kevin are staying warm and dry and well fed. As
soon as power returns he will post the latest ECN report.
73,
Karl N7NLU
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Elecraft
David,
First thing is to verify the probe. Did the probe test give a correct
reading of 4 MHz when it was checked in the 3rd step on page 46 of the
manual? Note that this only checks the operation of the probe and has
nothing to do with proper setting of the 4 MHz reference oscillator.
If your
Chris,
Check T4 very carefully - does it have the correct number of turns? Is the
correct winding inserted into the correct holes? Are the links present and
soldered into the correct holes?
Your bias voltage is a bit high - check to be certain Q11 and Q13 have the
expected DC voltages (see the
Hi Folks:
Several years ago, using an Elecraft design, I developed a PC board
which would allow K2 owners to key an external T-R relay for the
purposes of controlling an external QRO RF Amp, or other external
devices. Over the years that design has morphed a bit into a more
robust device,
Robert,
Did the base K2 receive OK before you added the KPA100? - note that the
KPA100 has nothing to do with the base K2 receive, but I would like to know
if it worked fine at one time in the past.
The most likely thing that would cause the filter settings to fail is a
failure of the BFO or a
Scott -
The K2 is a great kit, a very nice transceiver.
I built K2 # 54xx in spring 06. It went pretty
much without a hitch, and at every build stage -
it came thru fine and all specs were right. Great
feeling.
One fact you might want to consider - Elecraft Inc.
really doesn't have a Service
Elliot,
The KPA100 problems that were solved with the upgrade typically involved an
oscillation on 40 meters that might occur if the KAT100 was also in-line.
If your KPA100 is working fine, you should not have to do the upgrade.
OTOH, if you do want to add the change just to upgrade your KPA100,
WA6BND according to the Famous Hams website:
http://users.tellurian.net/gjurrens/famous_hams.html
73 de Brian W3BW
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of John [N5BSD]
Sent: Monday, November 13, 2006 14:47
To: elecraft@mailman.qth.net
Subject:
Actually 2 questions:
1. I made the first power up and everything went just like the manual.
However, the preamp is marked on. The manual doesn't say which way it
should be and I thought I'd check before I got too much farther.
2. I'm confused about soldering the RF probe. I can't seem to
For the last couple of nights, at about 7022 kHz there is a most
annoying noise that appears not to be random. If this is a digital
mode, what on earth is it?
It's about 3 kHz wide and has a high and low register, both are
gravelly and seem to be fairly broad spectrum audio.
God, it's
Could this be the recent Chinese jamming signal?
Stuart
K5KVH
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I understood the markings. I just had misgivings about the equivalence
of the plastic blue caps and the disc ceramic NPO types that I am more
familiar with. I do find the near microscopic print on these little
caps to be quite a challenge - even with a large magnifying glass. I
can hardly
Everybody needs one of these little dodads with the two alligator clips
mounted on ball joints. Radio Shack used to have them. I have two and
use them constantly. That's how I did my probes. I also use it to hold
a string of solder. This way, I can hold the board and iron to the
solder
This Wednesday evening (Thursday morning UTC time) will be the NAQCC
Sprint for November.
This month, the Sprint will be held on 80, 40 and 20 meters. This month,
a special certificate will be given to the operator who has the most
QSOs on 80 Meters. The Sprint will run from 8:30 to 10:30
Doug Person wrote:
Everybody needs one of these little dodads with the two alligator
clips mounted on ball joints. Radio Shack used to have them.
Radio Shack still carry this item. Kronus Helping Hands , Cat#
0-87259-879-9. I have seen them in the stores locally.
Larry
KB5DXY
Please forgive my block-headedness!
I replaced the D13 and no better.
The probe seems OK and gave a correct reading when it was checked on
page 46.
I will proceed with the construction of the RF Probe.
Thanks
David,
First thing is to verify the probe. Did the probe test give a correct
reading
I don't know. Must be asleep at the switch.
Here's what's what so far this end.
The probe verifies -- it did read correctly in step 3 on page 46.
The leads are correct.
I have replaced the suspect diode but the probe will not read anything
at TP1.
I have constructed the RF Probe and connected it
There is no doubt which rig dominates the standings
that way. I'm getting ready to insert Elecraft into
the rig column on my spreadsheet, and delete it out if
the entrant used something different ;)
Of course, my K2 runs all the contests with me too!
73/72
Jeff - VA3JFF
Ladies and Gentlemen,
Here is the reply from Steve : -
In 6th grade I had a Novice license which expired in 1 year.
In 11th grade I had a Technician's license which lasted 5 years. It was
equivalent to a General for the test except a slower code speed. I didn't
want to go to San
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