[Elecraft] K3 S-Meter Calibration

[William Shappley]

In case anyone wants to compare, I just calibrated my K3's S-meter  
with an in-cal HP 8640B.The new firmware (Version 1.87/1.69)  
includes the magic
S-meter that reads the same no matter what (pre-amp, attenuator,  
etc.) and since the firmware documentation said recalibration is  
required, I decide to give it a whirl.


I calibrated at 14.100 MHz, and used the following levels:

S9 = 50 microvolts
S5 = 3.2 microvolts

The results:  SMTR SC = 16 (default is 14), SMTR OF = 20 (default is  
24).


The new absolute mode is amazing.  After calibration, I can put in 50  
microvolts and get S9 and 3.2 microvolts and get S5 in ATT, PRE or  
normal.


By the way, the power control IS much more stable in digital modes  
(RTTY in DATA A), and the average power on speech (using an LP-100  
vector wattmeter) is noticeably

higher.

Cool.

73,
Bill
K4DXU



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[Elecraft] FS: KX1

[William Shappley]

Well, it breaks my heart, but I've got my K3, and I've now Pelican- 
cased my K2 to be my new portable rig, so it is time to sell the KX1.


The details:

KX1 4-band (80, 40, 30, 20)
Serial #702
Built by an Electrical Engineer with extensive building experience  
and the proper tools - me :)

Includes KXPD1 and the built-in autotuner
At least 3W out on all bands with 13.8 VDC in
S7 to S9 all bands with 50 microvolts in
Built-in and working N0SS / K6XX CW spotter tied to the logbook LED  
(you can still turn it on as a logbook light if you need to :)
Includes a fitted foam lined case (formerly a Preparation H box - not  
Pelican, but it works) and the Nifty! quick reference laminated guide


Pics are available if desired.

Price is $495 shipped anywhere in the USA (If I added right, just  
buying the kit parts would be $522 unassembled, not counting the CW  
spotter)


Please contact me off list if interested.

Thanks!

- Bill
K4DXU

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[Elecraft] FS: KPA-100 (Sold)

[William Shappley]

The KPA-100 is sold.  Thanks to all who inquired.

73,
Bill
K4DXU

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[Elecraft] FS: KPA-100 Built and tested

[William Shappley]

I find myself now with a K3, a K2/100 and a KX1.  I don't need them  
all, so here is what I would like to do.
I'm going to sell the KPA-100 and use the QRP K2 as my travel radio.   
I will also be selling the KX1
before long, but for now, let me offer a perfectly functional  
KPA-100, built by me (I am an Electrical
Engineer with extensive kit building experience).  Toroids by the  
Toroid Guy.  This one is Rev. G, includes the resistor mod
AND the C31 0.22 uf mod.  Price is $425.00 shipped anywhere in the  
USA.  Please contact me off list at:

[EMAIL PROTECTED]

Thanks and 73,
Bill
K4DXU

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[Elecraft] K3 Line-In for PSK31 not working

[William Shappley]

Alan -

I have used PSK31, MFSK16 and RTTY using Hamscope with no problems.   
However,
the rear panel LINE IN (mono) and LINE OUT (stereo) jacks are 3.5mm,  
NOT the
old trusty 1/8 inch (they are slightly larger).  I initially used  
some 1/8" plugs I had, and they worked, but were
loose and prone to poor connection.  I ordered 3.5mm plugs from  
Mouser and they fit FB.


- Bill
K4DXU




Lyle replied to Alan:

Message: 13
Date: Mon, 14 Jan 2008 15:16:17 -0800
From: Lyle Johnson <[EMAIL PROTECTED]>
Subject: Re: [Elecraft] K3 Line-In for PSK31 not working
To: elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed


I was going to use VOX instead of a physical PTT, but that doesn't  
work

well. I've adjusted gains but it insists on cycling on & off. Thought
anti-VOX would fix, but it doesn't.



Please check your cable and verify it is firmly seated into the K3 LINE
IN connector.  I routinely use LINE IN with VOX in DATA A mode to
operate PSK31 on my K3 with no problems.

73,

Lyle KK7P

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[Elecraft] DSP for KX1 and K1

[William Shappley]

The nature of the KX1 (and the K1, hope to build one of those soon)  
would argue for a very low power,
simple DSP.  Since they are CW only rigs, Autonotch doesn't make  
sense to me (wouldn't it attack
the CW note you are trying to hear?).  Also, the KX1 built in crystal  
variable filter works FB for me.  So,
I think my preference would be a denoiser only - I'm sure you could  
fit that in the K1, maybe in a KX1.


73,
Bill
K4DXU
KX1 # 702
K2 # 5540
K3 # 00175


Lyle Johnson wrote:

If a really low power DSP could be made for the K1 and/or KX1 - say, one
that consumes 10 to 15 mA from a nominal 6V supply, less from a higher
voltage - which features would you be seeking?

Selectable bandpass filters?  Auonotch?  Denoiser?

Which would you be wiling to give up?

No, there is no project like this in the works, but I tend to think
about DSP...

Thanks!

Lyle KK7P
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[Elecraft] Elecraft Net Report for January 6th and 7th - Minor correction

[William Shappley]

Kevin -

Just a note to congratulate you on being able to hear me on the 7045  
KHz net yesterday evening.

The band was way down here in TN and the QSB was rapid and deep.

The minor correction is that I was on K3 serial # 175 for the net -  
my K2 (# 5540) was asleep and
resting.  As usual, 100 watts into my horizontal loop wire antenna.   
If it were not for the K3 DSP

noise reduction I don't think I would have heard anything!

Yes, good things come to those who wait - the K3 arrived in kit form  
on Dec 20th.


Thanks and 73,
Bill
K4DXU




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[Elecraft] K3 Receive 500 - 700 KHz

[William Shappley]

Yep, just did it tonight on K3 serial number 175 - works great!   
Listened to WSM (650 KHz, showing S9 + 40 but I'm close) and some  
others.
Mostly you hear AM broadcast radio stations, of course.  I also tuned  
around the 2-3 MHz areas and found the nearby shortwave station

(WWRB) and the 6 MHz range, it all works.

I do have the KBPF3 installed and the 6 KHz AM filter.  AM mode, or  
course (firmware version 1.55 downloaded).


The alternate AM mode (AM synchronous) is not in the firmware yet,  
apparently.


73,
Bill

Larry, WD4MBE wrote:


Dave W7AQK reported in his Dec. 29th post, 'K3 Performance', that he  
was having trouble receiving anything between 500-700khz on his K3.   
A later post from Dave informed us he did have the KBPF3 general  
coverage filter module installed.


This concerns me. There is an AM station on 630khz about 100 miles  
west of me in NC that I like to listen to during the daytime on my  
Yaesu FT-920. The problem with the Yaesu is that I get blow-by from a  
600khz station that is located about 10 miles from me. I was hoping  
my upcoming K3 would eliminate this problem for me. I sometimes  
listen to WSM 650khz, Nashville, TN, in the evenings, but the Yaesu  
does ok for that station.


I am not ordering a K3 just for AM broadcast band reception, but it  
sure would be nice if I could hear the lower end of the broadcast  
band with some rejection from stations close by to me.


Would some of you current K3 owners please check and see if you can  
hear anything between 500-700 khz.  Also, do you have the KBPF3  
installed and use the AM filter?


Many thanks and Happy New Year!

Larry
WD4MBE

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[Elecraft] TXG Message

[William Shappley]

Regarding the TXG message:  I just finished the assembly and  
alignment of K3 SN 000175.  During the low power transmitter gain
calibration, I got the same message.  It happened to me in the 60M  
band.  Apparently, after doing the synthesizer cal, the VFO stops
on some frequencies unsuitable for transmit.  You would get an END  
message normally if out of band,
but for some reason on 60M I got the TXG.  After setting the VFO to a  
legal 60M frequency, it worked fine.  So, it may
just be that you are not on a legal 30M frequency.  Set it to 10.125  
and try again.


73,
Bill
K4DXU


Date: Sun, 30 Dec 2007 13:21:41 +
From: "David Ferrington, M0XDF" Subject: Re: [Elecraft] K3 ERR TXG


As per owners manual

Transmit gain constant out of range.
This usually indicates a problem with band-pass filter alignment or  
one of
the low-pass filters. In either case it could affect one or two  
bands. See

service manual.

(just been working on
 :)


On 30/12/07 13:10, "Rowland" <[EMAIL PROTECTED]> sent:



I have installed my Xmas present  the KPA3 into K3 36
All seems to be OK apart from an error message, ERR TXG on the 30m  
band

only.
Other bands seem OK and acting as should.
When trying to transmit into a dummy load 50Ohm  I get no power out  
and

hear a 200Hz or so whine coming from the rig.

The manual says that usually indicates a problem with band-pass  
foilter

alignment or one of the low pass filters. See Service manual.

Anyone any ideas please.
I guess elecraft tech help not available today.

Thanks
Rowland
G4APO




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[Elecraft] K3 S/N 175 Received

[William Shappley]

Sorry for the late report - I just got back in from out of town:

K3/100 kit  S/N 000175
Invoice 47515
Ordered May 2 with 50% deposit
Received via UPS on Dec 20th.

With luck, I hope to have it on the air by Sunday, Dec 30th.

Merry Christmas!

- Bill
K4DXU

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[Elecraft] Dayton experience

[William Shappley]

Just got home a few hours ago.  Let me add to the comments of the  
others regarding the K3 and Elecraft at Dayton:


1 - The K3, in terms of looks and quality, is a world beater.  The  
way the controls feel, including the pushbutton functions  
incorporated into some of the
  knobs, is first rate.  Also, the response of the displays to  
control inputs is very quick and smooth,  I put my deposit in before  
Dayton,
  and I should be in the July / August delivery bunch.  I'll be  
patient - it will be worth the wait.


2 - I was a booth volunteer and I wanted to thank Heather (sorry,  
didn't get a last name) for being so friendly and making me feel at  
home.


3 - I met Lyle, KK7P, the DSP designer and firmware guy - very  
impressive.  In fact, I bought a KDSP2, which uses Lyle's DSP design,

 for my K2 while I was there.

4 - I got to meet in person both Tom, N0SS and Don, W3FPR.  Both are  
very nice and a lot of fun to talk to.  I reminded Tom that I had worked
 him during the Halloween event from Frankenstein, Missouri  
(loved the QSL card).  And, it was a real treat to talk to Don about  
K2 and KPA100

 things in general.

All in all, a very enjoyable Dayton.  I'll be anxiously looking for  
that notice from Elecraft that the K3 for me is on the way!


73,
Bill
K4DXU

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[Elecraft] W1 Enclosure by W8FGU

[William Shappley]

For those of you looking for an enclosure for your W1 wattmeter, let  
me recommend the units made by Dave Van Wallaghen, W8FGU.
I received my enclosure earlier this week, and installed my W1 into  
it today.  Everything fits perfectly, and it really completes the W1 and
converts it from a workbench only instrument into a nice portable  
wattmeter for use in the field.  Dave's workmanship is first class,
especially considering that he is building these basically by hand!   
And, the clear lexan shows off your workmanship instead of

hiding it in an opaque box.

Dave's website is at:

http://w8fgu.home.comcast.net/w1encl.html

I appreciate Dave's effort to create what I think is a needed  
addition for the W1, and say thanks to him for creating a unit that
I can take with me and my KX1 when traveling.  Next stop for my KX1  
and W1 - Dayton!


73,
Bill
K4DXU
KX1 # 702
K2 # 5540
K3 # TBD 
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[Elecraft] Case for W1 Wattmeter

[William Shappley]

I know several folks have asked for ideas about cases for the "naked"  
W1 wattmeter.  I recently acquired a Pelican 1040 MicroCase
(they are sold new on Ebay) and it works great to protect the  
wattmeter during transport, etc.  I mounted the BNC jacks on
the bottom of the board (and used elevated rear "feet" to keep the  
unit level in use) and ordered the Pelican "Pick and Pluck"
foam insert along with the case - with proper picking and plucking,  
hi hi you can fit the wattmeter right down into the Pelican case.   
When closed,
the case cover applies a little pressure on the battery, but that  
just serves to press the W1 down into the foam and keep it from

moving around.

Regards,
Bill
K4DXU

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[Elecraft] Re: KPA-100 Power control unstable on 40M

[William Shappley]

Steve -

Much obliged.  I tried the mod you addressed and that has settled  
it down.  Just a slight overshoot when set at 100W.  More
when running lower (25W), but not as bad and I don't really care  
since the KPA-100 has plenty
of headroom down there.  I used the 1K and 3.3K values on the KSB  
board as recommended.


73,
Bill
K4DXU

Original reply:

Bill:

It could be the problem I and some others had, where
there was a bit too much gain through the transmit
chain when the KPA-100 is installed for the ALC to
maintain control (in my case it was worst on 80m).
Here is a link to my "problem solved" post, which also
links to my original problem post.  I can probably
root around and find some off-list correspondence I
had on this subject if you would like more info.









I believe there has been at least one case of similar
symptoms that were not fixed by the cure I used,
however.

73,
Steve VE3SMA

Original Message:



Anyway, I am seeing unstable power control on 40M SSB. 40M CW seems  
fine (although the power control "hunts"
a little more than it does on the other bands). The power output on  
my peak reading Bird
will exceed 150W on voice peaks - on the other bands, the peak is  
at or below the power control setting.
Input current hits about 20 amps (normally it is pulling about 15  
amps, except






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[Elecraft] Unstable power control on 40M SSB

[William Shappley]

Folks -

I just completed the KPA-100 amp for K2 #5540 and everything is great  
except for one problem.  My memory tells me that I have seen  
something on this before

on the reflector but I cannot remember the solution.

Anyway, I am seeing unstable power control on 40M SSB.  40M CW seems  
fine (although the power control "hunts" a little more than it does  
on the other bands).  The power output on my peak reading Bird
will exceed 150W on voice peaks - on the other bands, the peak is at  
or below the power control setting.  Input current hits about 20 amps  
(normally it is pulling about 15 amps, except
it pulls about 18 amps on 17 meters CW or SSB - but power control is  
stable there).  I tried SSB into the dummy load on 30M since it is  
the same LPF, but power control is FB there.


By backing the power control down below 60 watts, the peaks can be  
reduced, but it is still hitting 40% or more over the setting -  
again, ONLY on 40M SSB.


There are no high current or any other errors showing up.  My KPA-100  
came with the resistor mod, and it is installed.  I have already  
performed the R98 mod on
the base K2 which did help stabilize the power "wiggles" on 40M CW,  
but did nothing to tame SSB.  All of this is into a verified good  
dummy load.  I have seen the same

high peak power that the Bird is showing on my LP-100 meter also.

Has anyone seen this before?

Thanks,
Bill
K4DXU

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[Elecraft] Re: Suggestions for a paddle

[William Shappley]

Gentlemen -

Amen to the Begali paddle!  I've always been allergic to Iambic mode  
(it seems to want to talk when I want to shut up!)
but I liked the "thick" feel of the iambic paddles.  Begali shipped  
me a "Simplex Mono", problem solved.  It is a mechanical
work of art.  They gave me great service, quick shipping, and the  
price was not at all bad.  I dealt with Pietro's daughter,

Bruna.  It is a well run company.

73,
Bill
K4DXU
K2 #5540
KX1 #702

Original message:
 
*

Message: 26
Date: Sun, 17 Dec 2006 11:51:28 -0700
From: Jay Schwisow <[EMAIL PROTECTED]>
Subject: Re: [Elecraft] suggestions for a paddle?
To: tom martin <[EMAIL PROTECTED]>
Cc: elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Tom,

Now this will make a good thread - enough arguing about no-code vs.  
code.


I highly recommend a Begali paddle as seen as www.i2rtf.com. 

 
*

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[Elecraft] Raspy Audio from K2

[William Shappley]

John -

I saw your message on the ECraft reflector.  I have tried exactly the  
same thing in my shack, and I always will hear a raspy audio sound,  
even from perfectly functioning rigs that get FB on air reports.  I  
have never had time to track
down exactly what is happening, but don't get wrapped around the axle  
too much.  I suspect it has something to do with a combination of the  
extreme sensitivity of a ham rig, and the dummy load consuming the  
actual modulated
output of the rig under test, leaving mostly "leakage" products and  
funny IM from things that only travel a few feet for the listening  
rig to hear.


Try it on the air before you get too deep into troubleshooting.

73,
Bill
K4DXU
KX1 #702
K2 #5540



Message: 2
Date: Wed, 13 Dec 2006 06:14:58 -0600
From: "John R. Lonigro" <[EMAIL PROTECTED]>
Subject: [Elecraft] Raspy audio from K2
To: Elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I recently finished building the KSB2 and did the alignment on the
filters.  Everything seems to be working as advertised, except on
transmit my voice sounds raspy.  I haven't had time to dig into the
problem yet, but I did try 3 separate mics and got the same result.  For
my test, I transmitted at 1 Watt into a dummy load while listening on my
Icom 706 with headphones.  My first assumption is that I simply need to
tweak the transmit filter, but I'm asking if anyone else has had the
same symptom that was perhaps caused by something else.  For example, is
it possible the two radios are simply too close to each other for a good
audio test?  They are on separate supplies and were about 6 feet apart
during the test.

Thanks and 73's,

John AA0VE
K2#3401

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[Elecraft] Changes for KPA-100 Rev. D and the Toroid Guy

[William Shappley]

I just happened to have received a Rev. D KPA-100 a few days ago (I  
have not started on it yet).  There are new loose schematics in the  
front of the Rev D manual with instructions to use them instead of  
the ones already bound in the Rev D manuals - the loose schematics  
are labeled Rev H, 9/25/06.   The schematics already included in the  
Rev D manual have an earlier date than the loose schematics (Rev H,  
8/28/06) but in a side by side comparison I cannot find any  
difference between them!  But by comparing the Rev. C schematic off  
the Elecraft site with the new ones, I can find the differences:


The old L16 was on a Red T44-2 core, with 29 turns
The new L16 is on a blue T50-1 core, and has 37 turns

The old RFC1 was a pre-made large inductor - the new RFC1 is the same  
as L16 (T50-1 core, 37 turns).


Incidentally, for the first time, I had the Toroid guy make my  
inductors instead of winding them myself.  He gave me very quick  
service, with excellent communications, and by the way he threw in  
the new RFC1 and L16 (he had already shipped the "standard" Rev C  
set) at no extra charge.  Highly recommended.  He e-mailed me and  
asked whether I had received a Rev D kit even before I had checked  
myself, so he is really on the ball.  And by the way, his toroids are  
beautifully done.  I thought I wound a pretty good toroid (well, they  
all worked, anyway) but his are really works of art!


Hope this helps,

73
Bill
K4DXU
KX1 S/N 702
K2 S/N 5540




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[Elecraft] K2 #5540

[William Shappley]

K2 #5540 is now alive!  It was purchased at Dayton, and first came to  
life about 2 weeks ago.  It is a base K2 at the moment, but I have  
the KSB module on the bench now, and probably will purchase the  
KPA100 around Christmas.  No assembly problems, everything checked  
out the first time.  Due to my work schedule I only have a few hours  
here and there.  That forced me to take my time and be careful, and  
it paid off in a perfect assembly and checkout.  Filters were aligned  
using the Elecraft Ngen noise generator and Hamscope software  
(spectrum plot).  The crystal filtering is very impressive - I will  
probably get the DSP board at some point but I could be very happy  
with the Xtal filters alone.


This is probably the best CW rig I have ever owned - very smooth and  
easy to use.  My previous favorite was a Ten-Tec Triton IV, but the  
little K2 has it beat hands down.  All in all, a very fun kit  
building experience.  When I was a young man, I enjoyed building  
Heathkit test equipment (a lot of which is still in use), so I am  
grateful that someone still designs and sells kits.


Best regards to everyone.

- Bill

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