Neat,
So will it be possible to do one scan with a 50ohm load terminating the
cable, then do it again with the antenna connected, subtract the plots and
end up with the antenna characteristics?
Mike
VK1KCK
K1 #2599
Message: 20
Date: Tue, 04 Apr 2006 13:56:03 -0400
From: Larry Phipps [EMAIL
I just wonder why would a K2 owner want to spend good money for one of those
solely to jumper the mic lines. There is a header to do the same thing on
the rear of the front panel. Elecraft designed it so you can interface any
mic to the K2, but I still believe it is easier to re-wire the mic
Not only does mine have a thermometer, but it has a nifty night-glow
back light that looks really cool when you press the snooze button.
And it folds up just like a travel alarm clock should so when I do field
day I can take it with me to monitor both time and temperature.
Best of all, it looses
I have a K2, s/n 4998 that includes the following for sale:
KPA100 - 100 watt amplifier
KSB2- K2 SSB Option
KDSP2 - Advanced K2 DSP Filter
K160RX- K2 160M / 2nd RX Antenna Option
FDIMP - Finger Dimple
KAT100-2 -100W ATU with EC2 panels installed in EC2 below.
EC2
Mark -
I think you need to find the NMEA 0183 specification for $GPxxx strings. They
are a lot easier to write a simple program to read than bit-banging to extract
a DST bit from a binary stream.
How did knowing the DST bit help anybody who lived in Indiana before the law
change last
Hello to all. I have been on the fence for a KX1 for a while
now, and am close to taking the plunge. My trusty HW-8 is pretty bulky in a
backpack. I was wondering if anyone has considered a 17 meter option. I would
gladly exchange 20 or 80 for 17.
Thanks and 73s,
Pete
wd4lst
Pete Axson
WD4LST
You know, I still don't get it. I haven't been able to comprehend what
really goes on inside even a simple pixie curcuit. And the math eludes me
keeping me from getting my extra class. I've missed a lot of rare DX
because I am not allowed down in that portion of the band. I know good and
I'm making a slight change to my earlier post on my trip to DE for the ARCI
Spring QP.
I will check the top of each hour, for 5 minutes, on 15m, not 10m. However, I
will check 10m at the bottom of each hour.
I will call CQ QRP for 5 minutes. If the action is good, I'll stay there until
it
Hi Kevin,
I designed the XV transverters for Elecraft and will attempt to answer your
question.
Receiver design always requires some compromise between sensitivity and
dynamic range. To maximize sensitivity, lossy elements, like filters, are
moved farther away from the antenna to minimize
I did the exact same thing you did Rick. Same RS cap
and AGC did not speed up as I had hoped.
Also wonder what other might have done?
73, TY, W1TF, K1 # 1423
--- Rick Dettinger [EMAIL PROTECTED] wrote:
I changed C31 on the RF board to 1uf but it still
seems very slow. When I
remove an S9
On Wed, 5 Apr 2006 08:22:01 -0400, Don Wilhelm wrote:
There is a new item from MFJ that people may find helpful when
interfacing a mic to the K2. Its an MFJ-655 mic equalizer/conditioner/
preamp that is supposed to interface any mic to just about any rig.
I just wonder why would a K2 owner
i have not had to post a message before i rely on others to answer any
questions that i might have ,but a small problem reared its head on my k2 ,the
headphone jack ,after emailing Richard in support he confirmed what i had
thought and said he would contact parts ,2 hours later Brian in parts
Ron ZL1TW and I have played with the AGC on the K1...here's a cut and paste
from one of our exchanges earlier this year.
My mod adds a .47 cap in series with the AGC On-Off line so that by turning
the AGC off I can return to the longer recovery time (which I never choose
to do).
Not sure if the
Hi Ralph - I received an off list post from a member who recommended
changing C31 to .22uf and C67 to .01uf . Said it made a big improvementin
the AGC action. Have not tried it yet but I think I will next time I have
the covers off. 73 - Rick - K7MW- Original Message -
From: Ralph
I changed the VFO frequency range capacitor to 120 pf and now have a 178 khz
tuning range. Since I only need 125 khz to reach the SKCC frequency of
7120 khz, I may try a 100 pf capacitor. I would like to know what types of
capacitors will work will here. The 68 pf capacitor is a disc ceramic
As the principle designer of the K1, I just love these AGC circuitry
discussions, and thought I'd better put in my 2.5 cents.
The K1's present AGC circuit, being AF-derived, is a compromise between
attack time and recovery time. This topic has been the subject of
scholarly efforts by Haward,
-Original Message-
There is a little trick to driving the K2 that might not be
obvious...
FR0;FA0001410;
...
Depending on application, issuing K20;AI0;
Hi Dave,
Thanks for sharing your experience. I have tried this now by defining a new
Elecraft setup in BeaconSee. It
On Apr 5, 2006, at 1:06 PM, Sverre Holm wrote:
I wonder if the beep is a standard error message from the K2 when it
receives an incomprehensible command over the KIO2?
There's no beep in response to a garbled RS-232 command, Sverre. The K2
ignores incorrect commands and quickly recovers to
Hmmm, well, I may be confused but I *think* you just told us how to
convert the K1 from AF derived AGC to RF derived.
I realize making the AGC respond faster to a large signal would take
that sort of mod, but isn't it just a cap change to speed up the decay
after the large signal is gone?
Of
Thanks Wayne - I am ready to place my order for a fast AGC option module.
Without the battery option, I think I have room. Probably enough room for
a TUF 1, K2 type mixer module also (just kidding, sorta). Rick - K7MW
- Original Message -
From: wayne burdick [EMAIL PROTECTED]
To:
Many of you know Don Wilhelm, W3FPR. Even if you don't know him
personally, you may have benefitted from one of his many postings to
our reflector. Don's an expert on our product line, and we consider him
an honorary (if not official) member of the Elecraft support staff.
With this in mind,
Actually, WWV and WWVB are not worldwide in range. Military uses a system
that is space based so they can see 12 satellites for a fix from anywhere
on the globe they may need position.
But, there are effects to GPS signals if you are not using a 12 satellite
solution, and thus, GPS quality at
-Original Message-
I wonder if the beep is a standard error message from the
K2 when it receives an incomprehensible command over the KIO2?
There's no beep in response to a garbled RS-232 command, Sverre. The K2
ignores incorrect
commands and quickly recovers to process the next
On Apr 5, 2006, at 2:34 PM, Sverre Holm wrote:
Evidentally the K2 does not like a KIO2 input command at the same time
as
the PTT is keyed, but removing the PTT connection solved the problem.
Thanks for the update, Sverre.
Some commands are not allowed in transmit mode, as specified in
I think what Ron and I were shooting for was not a really fast AGC but more
of a Not-so-gosh-darned slow AGC.
Wayne...doesn't 9 to 15 seconds for the S-meter to drop seems excessively
long to you? Especially for a QSK rig.
When I changed C31 from 2.2 to .22 the hang time seemed to approximate
Tom,
The selected part really is 2.2 uF, which provides a long enough AGC
hold time to prevent annoying leading-edge effects during slow CW copy.
If you mostly listen to much faster CW, you can certainly drop the
value.
In any case, the decay time will be roughly proportional to the
I was wondering if anyone has considered a 17 meter option.
The clocking rate of the KX1's AD9834 DDS chip is 50 MHz, the maximum rated for
the chip. Typically, the highest usable output frequency from a DDS chip is no
greater than about one-third the clock rate, or about 16.6 MHz.
Thus, the
I changed the VFO frequency range capacitor to 120 pf and now have
a 178 khz tuning range.
That's why I've always termed this option as the 180 kHz option rather than
Elecraft's 150 kHz characterization.
Since I only need 125 khz to reach the SKCC frequency of
7120 khz, I may try a 100 pf
Some KX1s have slightly lower transmitter output than others. When
using a 14V supply, the output may be as low as 2.5 to 3 watts across
all bands instead of the expected 3 to 4 watts. When using the internal
battery the output maybe as low as 0.75 to 1 watt instead of he
expected 1 to 1.5
You mentioned having changed out the 30m hetrodyne crystal, which I assume
means that your 30m band tuning now starts near 10 MHz. Reducing VFO span
to, say, 125 kHz will mean that you'll only be able to cover about the first
20 kHz of the 30m band.
73,
Mike / KK5F
Yes, I can copy WWV on
Since someone already hollered privately and said, That URL doesn't work!
Note that most people will have to splice it together again! The long URL
gets broken in a lot of e-mail readers.
An alternative TinyURL that will take you to the same Elecraft document to
download/view the Application
Mike, I think the activity times you suggest are a good idea. It is
amazing how seemingly dead bands come to life during contests. While we
are at the bottom of the sunspot cycle and nobody expects the bands to
be open, they are more often that most people would reallize. Check 10
15m
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Hash: SHA1
I have not opened mine up yet, but in looking at this I found a typo
in the App Note
it says Locate resistor R30 on the bottom of the board between
trimmer pot R30 should that be R4?
Randy Rathbun NV0U
[EMAIL PROTECTED]
K2#1981, kx1
Irecently changed my K1's VFO range. Now I can reach 7150 on 40 meters.
On 80 (with my 2 band 160/80 meter RF board) I get up to around 3673.
I also tried the 1 mf cap in AGC circuit with no results.
73,
Sandy W5TVW
- Original Message -
From: Rick Dettinger [EMAIL PROTECTED]
To:
This is the MAIN reason I changed the VFO span, to get up to 7100
to 7150 coverage. At the same time, I pulled the 30 meter crystal and
installed the 10-10.15 crystal originally supplied if the 150 Khz span was
desired. I also replaced the original plastic shaft 10 turn tuning pot
with a metal
Complete K2 for sale. Serial number 5290. Includes the K2, KPA100,
KSB2, K160RX, KIO2 mounted in original K2 top cover, FDIMP, KAT100-1
$1200, shipping included to US. Reply off list to [EMAIL PROTECTED]
73, Bill N2BC
___
Elecraft mailing list
You are absolutely right. It is R4, not R30!
Ron
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Randy Rathbun NV0U
Sent: Wednesday, April 05, 2006 5:24 PM
To: wayne burdick
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KX1 power output increase --
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Just finished doing the mod here. I have some good news and some bad
news
Good news is it seems to have helped on 40/30/20. They are now 3 to 4
watts out. Previously I was in the 2.5-3.0 range at best with just
the 30 m module in, and was
It's that time again ... this weekend is the Spring
QSO Party!
For those of you participating in the team
competition, please email me before the start of the
contest with your team members (thanks to CCO
Beaverboys, your's is received.)
Here are the official rules, good luck everybody and I
Hello
Sorry for off topics.
I and XYL have a plan to visit Vancouver this early summer.
I have already received licence to operate HAM radio there.
Is there any one who kindly give me informations about QRP
activity there ?
What is recomended spot/band ?
What is best time to operate in a weekday
In practice, RF gain is rarely backed down by K2 users -- the AGC
system has a very pleasant sound and very wide dynamic range. This
could easily be achieved with the K1, too. But you could incorporate a
manual RF gain control if you wanted to. Finding a place on the K1's
front panel is another
Randy,
If you're only getting 0.5 watts out on 80 m, it has nothing to do with
the two added resistors, and changing their values won't make any
difference. Most likely you have a toroid lead on the LPF1 module that
isn't making contact, or the relay on the module isn't getting turned
on
On Apr 5, 2006, at 9:59 PM, Rick Dettinger wrote:
It wouldn't be to difficult to put a panel mount RF Gain pot in place
of the
AF Gain control.
I agree that this would be possible, but I'm not sure how many K1
owners would want to make this tradeoff. I use the AF GAIN control
constantly.
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