Jim,
Why are choke baluns wound as a coil vastly superior to choke
baluns made with a sting of ferrite beads? With the coil type, you're
adding additional coax loss... What am I missing here?
73,
Bob W1SRB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Hello All,
There have been several e-mail threads recently about ferrite
cores and about baluns and transmission line loss with high SWR. Related
to this is a question that I haven't seen addressed anywhere - toroids
all have a specified frequency range but what happens when they're used
, EZNEC,
transmission line programs, etc.?
Thanks.
Bob W1SRB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Solosko, Robert B
(Bob)
Sent: Tuesday, July 01, 2008 11:05 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] LINIX PCs and ham SW?
Hi
Hi Folks,
I'm considering buying an inexpensive LINIX PC (i.e., ASUS eee)
to be dedicated to my station - my primary uses would be logging, rig
control and as a panadapter. Other uses would be running design
programs, e.g. EZNEC, TL-details, and general word processing,
spreadsheet,
Jon,
I can understand your frustration, but there may be a simplier
solution. The K2 comes with the parts to make a simple RF probe: 1N34A
diode, .01 uf cap, 47 M ohm resistor and a length of RG-174 coax. You
should be able to order all of the parts from Elecraft, including the
small PC
Lloyd,
I also made one very simply and cheaply from double sided copper
clad board based on a QST article that was published several years ago
(which I have in my files at home and can send you a copy).
Mine has a small horizontal board with a vertical board soldered
o it. The
That's true, but all you need to do is get a matching 6-32 screw to fit
the K2's threaded hole for the ground post.
73
Bob W1SRB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ken Wagner K3IU
Sent: Wednesday, April 16, 2008 3:01 PM
To:
Hello All,
How did the K3s perform under last night's conditions?
At just about 9PM EST, I heard the word Elecraft on 7188, and
after that I could hear that there were transmissions on that frequency,
but given the static crashes and high QRN level, nothing more was
PROTECTED] On Behalf Of Solosko, Robert B
(Bob)
Sent: Tuesday, February 19, 2008 1:00 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] OT: Relays for antenna switching
Hello All,
I planning to put up a 20m switchable vertical yagi made up of 4
vertical elements, with a relay control box
Hi All,
I have a related question: how do I tune the counterpoises?
My shack is also on the 2nd floor and I had major problems with
RF in the shack on 15m, 17m and 20m. My antenna is a 100' dipole
connected with ladder line to a 4:1 current balun that's just outside
the window
Hello All,
I planning to put up a 20m switchable vertical yagi made up of 4
vertical elements, with a relay control box to switch the elements to be
either the driven element or the reflector elements. Preferable the
relays should be DPDT, although I can use SPDT relays if they're cheap
Hello DW,
There are a few people who are making things for the K2 that are
not provided by Elecraft that provide additional capabilities and
convenience - these are individuals, like Gary Hvizdak, Don Wilhelm,
Mike Phipps and Jack Smith, who don't sell a lot of their products and
don't
For the few hours that I was on throughout the weekend, I managed 10 CW
and 2 SSB QSOs (and Scott was one of my CW QSOs) in MA, NH and RI, all
within about 50 miles of my QTH . But in the 2 years that I've had my
K2/100, these are my first QSOs on 10m, so I'm quite satisfied.
Bob W1SRB
Julian,
It's just as much of an insult to call the Elecraft crew liars and
accuse them of broken promises.
Anyone who's ever been involved in product development and ramping up
production, especially complex products where you're dependent on
suppliers to meet their schedules, know that
Peter,
I agree- my 100' fan dipole is fed with about 70' of ladder line
into a current balun, which is then connected to my KAT100 through about
5' of RG-8. The balun is attached to the side of my house just outside
the window and the coax brings it into the house. Since at 100w, a
Just to throw a little theory in here, the ability to extract
information from a signal in a noisy environment is a function of both
the signal level and the information rate of the signal. CW has a much
lower information rate than does SSB (as does PSK, for example), and
thus an SSB signal has
John,
There's lots of good advice here - I used a small pocket
magnifier to read the markings on some of the components. At some point
I bought a magnifying lamp from the local office supply store - it
worked fine for reading component values and for lighting the work, but
the range of
Hello All,
I hope that someone can suggest where to start tracing down a
rather strange tuning problem that cropped up in the middle of working
the IARU on Saturday. The short description is that the K2/100-KAT100
stopped tuning in AUTO mode when in high power mode on 40 meters. Here's
built my KPA100, but I don't know what changed from D to E. Are
there other things that I should check?
Thanks.
Bob
W1SRB
-Original Message-
From: Don Wilhelm [mailto:[EMAIL PROTECTED]
Sent: Monday, July 16, 2007 11:17 AM
To: Solosko, Robert B (Bob)
Cc: elecraft@mailman.qth.net
Subject: Re
. There
is only a loose link between the manual level and the hardware revision
level.
73,
Don W3FPR
Solosko, Robert B (Bob) wrote:
Thanks Don... My KPA100 was ordered in December and is Rev D, so it's
the version with the 40m parasitic problem fixed (it doesn't have RFC
10 on the antenna connector
Hi All,
My MH2 arrived on Friday and its first use was for field day -
My very first FD contact returned the unsolicited remark that I had a
very nice sounding signal (which never happened with my homebrew mic
using a Radio Shack replacement element).
Bob W1SRB
-Original
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
For Sale: ARRL Extra Class Q A book. Questions from the pool that is
valid through 6/30/2008.
Costs $17.95 directly from the ARRL plus postage and handling (they
charge $7.00 from CT to MA, for a total of $24.95) - selling for $15.00
including postage within the continental US. Contact me off
: Solosko, Robert B (Bob)
Sent: Wednesday, May 02, 2007 3:46 PM
To: 'elecraft@mailman.qth.net'
Cc: Bob Solosko
Subject: FS: ARRL Extra Class Q A
For Sale: ARRL Extra Class Q A book. Questions from the pool that is
valid through 6/30/2008.
Costs $17.95 directly from the ARRL
For Sale: Astron RS-35A power supply - 35 Amp linear supply, about 1 1/2
years old, excellent condition. Cost $150, will sell for $110, not
including shipping. I'd prefer to sell it to someone in the Boston,
southern N.H or western Massachusetts areas since at 27 lbs. the cost of
shipping may be
]
Sent: Thursday, February 22, 2007 12:44 PM
To: Lowell; Solosko, Robert B (Bob); elecraft@mailman.qth.net
Subject: RE: [Elecraft] Rf in the shack distorting audio - the results
Lowell,
Look at the Elecraft BL2 for a switchable 1:1/4:1 balun, it will handle
up to 250 watts. If you do not need
think of it, all of the few QSOs that I've
had on 160m have been below the upper 50kHz or so.
So, thank you all again - I'm very satisfied with the results.
Bob W1SRB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Solosko, Robert B
(Bob)
Sent
Hello All,
Several month ago, after I finished my KPA100, I found that when
transmitting SSB on the higher bands (20, 17 15), the computer
speakers across the room, when turned on, would screech - adjusting the
speaker volume had no effect (but turning off the speakers quieted
them).
Hello All,
There seems to be differing opinions about whether the Heil HM-4
and HM-5 provide enough output to properly drive the K2. Looking through
the HRO catalog, I found that Heil now has several electret mikes
(HM-iC, iCM, etc.) which they say gives higher output, but they also say
of about 15
seconds to put the unheaders back in place of these boards so I could test the
BFO and filters, both before and after the re-soldering effort.
-Original Message-
From: Don Wilhelm [mailto:[EMAIL PROTECTED]
Sent: Monday, November 13, 2006 8:32 PM
To: Solosko, Robert B (Bob
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
not always known to do it :-)
- Keith N1AS -
-Original Message-
From: Solosko, Robert B (Bob)
Sent: Monday, November 13, 2006 10:43 AM
... I finished the KPA100 over the weekend ... and in the process, broke
something in the K2.
___
Elecraft mailing
Scott,
Here's yet another idea...
One of my other hobbies is making custom cases for stringed musical
instruments. For the bottom and sides of the cases, I use closed-cell noodles
used by kids (and adults) in swimming pools, etc. They're available in almost
store that sells
The only really necessary option is the finger dimple (plus a source of power)!
Bob W1SRB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of KU4YP
Sent: Thursday, August 31, 2006 9:51 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] newbie question
Hello All,
Thanks everyone, there have been a lot of good suggestions. Some of
them seem to move beyond a simple front panel extension into the realm of a
remote front panel, which also has been explicitly mentioned. Perhaps there
could be two different products here, a simple front
Hi Don and everyone else,
The ability of software such as HRD to control a K2 is what gave me the
idea for a hardware front panel extension that would interface through a KIO2.
While a hardware front panel extension wouldn't have all of the capabilities
and flexibility of HRD, the goal
It seems to me that the K2 does everything I want it to do from a feature and
performance point of view - where it's lacking, as may people have said, is in
user ergonomics. There are just too many functions that are squeezed into the
limited front panel to make it very easy to use. While I
Dick,
If your filters are adjusted correctly (best done using Spectrogram, as
others have mentioned), it may be that you're not tuning the CW signal to the
center of the filter's band pass (usually set to 600Hz). I recently added a CW
tuning indicator to my K2, and now, once the
Martin,
I agree that the KIO2 is a very expensive option if you want to use a
KAT100 but don't need the serial computer interface (or if you plan to add a
KPA100, as I will eventually do). However, for about $5 in parts, I put
together a KIO2 alternative to control my KAT100 - it has
John,
There is an alternative to the KIO2. The KAT100 uses only a few control
signals from the K2 and doesn't use the RS-232 interface. You can easily and
inexpensively build a replacement for the control portion of the KIO2. Look at
the circuit diagram for the KIO2 and for the KAT100
I recently added a CW tuning indicator to my K2 (a very useful addition). The
other night I was listening to W1AW code practice and wanted to see how well I
picked it up one each of the bands on which code practice is sent. Tuning to
W1AW on 160m, the side tone of the W1AW signal was
Jean-Francois,
Of course, you don't need most of these neat things - I have a Panvise
(an old one) and found it not very useful because it wouldn't hold the board
once the components very close to the edge were put in. For de-soldering, I've
been using de-soldering wick, which looks
Michael,
Yes, I had the mike plugged in, so that's a possibility. However, I
tried reducing the power from 10 watts down to 2 watts or so and it had no
affect (I don't have a KPA100). I also changed from my antenna to a dummy load,
which also had no affect on the problem. But there
Hi All,
I have an intermittent problem with CW on my K2 (ser 5309).
My K2s been on the air for several months now on SSB and everything
works fine. Several weeks ago, I attempted CW (not having had a CW QSO in 40 or
so years), and it work OK for a few minutes -- then when I
Hello All,
I just added the DSP processor to my K2 and adjusted both the DSP and
XTAL filters to the same center frequency using Spectrogram. The DSP and XTAL
filters work fine together, except that when using the default filter settings,
the DSP and XTAL filters essentially duplicate
Hello All,
I plan to soon add the KAT100 to my K2 and eventually add the KPA100
(but probably not soon given budgetary constraints). I'd rather not have to buy
a KIO2 with the KAT100, since it will come with the KPA100. On KK7P's web page
describing remoting the KAT100, there is a
Hi All,
Even though I'm still building my basic K2, I'm already planning future
additions, which include the KPA100 and the KAT100. I read a number of comments
about putting the KPA100 in an EC2 case along with the KAT100 rather than in
the K2 itself. What are the advantages and
Hello All,
Thank you to all of you who answered my query about building a
K2 without having to remove components as I add options - the Rework
Eliminators is just what I was looking for.
Now for the next question - down in the bottom of my parts box
was
Hello -
My K2 kit is in the mail and is expected to arrive next week. I ordered
the K2, KSB2 and K160RX, so I'll be building those right away. Eventually I
plan to add the KDSP2 and KPA100. It appears that all of these add-ons
require some modifications to the basic K2. What
49 matches
Mail list logo
