Re: [Elecraft] OT: W9WDX Racing in the Air at Pennzoil 400

[Tim Tucker]

If interested, here's a short video I made of the event, which also
showcases the KX3 and KXPA100

https://youtu.be/s_7H2Z6rpQE?si=xZ1XnbDaUnXMXS0L

On Fri, Mar 1, 2024, 12:17 PM Tim Tucker  wrote:

> Sorry, 14.260
>
> On Fri, Mar 1, 2024, 10:25 AM Tim Tucker  wrote:
>
>> Hi all,
>>
>> I'm activating the Pennzoil 400 at Las Vegas Motor Speedway usingrhe
>> Elecraft KX3 and KXPA100.  I'll mostly be around 14.6mhz for a few hours
>> during the day all weekend if you'd like to make the contact.
>>
>> Tim
>> AE6LX
>> W9WDX Amateur Radio Club
>>
>
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[Elecraft] Have like new MH2 mic op trade for similar condition MH4

[Doug Hensley]

Looking for a new condition MH4 mic.  Have a nice
unused MH2 for trade or will just pay cash.

73, Doug W5JV









Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.


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Re: [Elecraft] Configure to send CW in SSB mode?

[Michael Carter via Elecraft]

Hi Mike,

>From K3 Owner's Manual in the section describing
menu entries, p.55:

CW WGHT 1.15 Adjusts element/space timing ratio (weight) for the internal keyer.
Additional functions of this menu entry, via numeric keypad (Advanced):
Tap 1 to select SSB -CW (default) or SSB +CW (allows CW in SSB modes).

[highlighting is mine]

73,
Mike, K8CN
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Re: [Elecraft] Configure to send CW in SSB mode?

[Dick Dievendorff]

Use the CW WGHT menu item,  tap the 1 digit.  See the description of CW WGHT 
around page 59 of the K3S owners manual.

73 de Dick, K6KR

> On Mar 8, 2024, at 12:55, Mike Dodd  wrote:
> 
> I just received a used K3 as a backup rig (had a K3s before the K4).
> 
> The manual says, and I know 5his to be true, "You can transmit in CW when SSB 
> mode is selected by just hitting the key or paddle."
> 
> But when I hit my key in LSB mode, no CW is transmitted. Is there a CONFIG or 
> MENU item I need to set to enable this?
> 
> The K3 Utility says this K3 is up-to-date on all firmware releases.
> 
> Thanks for any/all pointers.
> 
> 73, Mike N4CF
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Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Paul,

I'd say that our respective KPA3A TX Gain calibration
values are similar enough.  Having not had the
bipolar PA model KPA3, I don't have a point of
reference for whether your TX gain parameter
values are reasonable or not.

I would contact Elecraft Support and copy
Keith, WE6R  with
a request for their troubleshooting document
dealing with 'low TX output power.'  I don't
have a copy and only learned of its existence
by Keith mentioning it in another post.  I don't
think it's posted on the Elecraft public pages.

73,
Mike, K8CN
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[Elecraft] Configure to send CW in SSB mode?

[Mike Dodd]

I just received a used K3 as a backup rig (had a K3s before the K4).

The manual says, and I know 5his to be true, "You can transmit in CW 
when SSB mode is selected by just hitting the key or paddle."


But when I hit my key in LSB mode, no CW is transmitted. Is there a 
CONFIG or MENU item I need to set to enable this?


The K3 Utility says this K3 is up-to-date on all firmware releases.

Thanks for any/all pointers.

73, Mike N4CF
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Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

thanks Steve

Could you please point me to the assembly manual page to find it?

Mine is factory assembled, but I need to fix it here in my country, I need
to try

Thanks very much!

73,
Jorge
CX6VM/CW5W

El vie, 8 mar 2024 a las 13:32, Steve Cooke ()
escribió:

> Jorge . my K3 displayed the same fault sometime ago .Turned out to
> be D1 on the LPA a very fine hairline crack in the solder joint
> ...without Keith Trinity W6ER's advice in a previous reply to somebody
> else , I would never have found it .
>
>  It was only visible under a bright light ...and a
> magnifying glass .
>
>  73 steve G1MPW.
>
>
> On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:
> > hello
> >
> > My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
> >
> >
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-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] K3/100 TX problem on 20m

[dyno lab]

Hi Mike,

Thanks for the gain information.
I am going to look at the the gain numbers and see if there is any correlation 
with the wildly different input impedances to the output lowpass filters.

For reference, I found the input Z to the filters to be as follows:
160: 63.8 +J1.6
80:  35.7 +J5.1
40:  42.0 +J5.8
20:  32.0 -J2.1
17:  51.0 +J3.1
15:  49.6 -J0.3
10:  60.4 -J2.9
6:   51.0 +J0.14

Looking at the component values of the output filters, it appears that the 
above impedances were by design. Which makes me wonder if it was an attempt to 
compensate for the poor saturation characteristics of the MOSFETs and leakage 
inductance of the output transformer of the MOSFET amplifier (KPA3A)?

I am also finding in some cases that the K3s LPA (KLPA3A) has some problems of 
its own and does not like to play nicely with the input to the LDMOS K3s 
Retrofit Amplifier on 160 meters.
I would however like to avoid redesigning LPA by compensating for its 
shortcomings in the LDMOS amplifier.

Thanks again for your feedback.
73,
Hal
W7YNC  


> On 03/06/2024 3:07 PM PST Michael Carter via Elecraft 
>  wrote:
> 
>  
> Hi Paul,
> 
> For comparison, here are the 50 watt TX gain values from the
> calibration I did last November when I installed
> the KPA3A 100 watt PA in my K3 (s/n 67xx):
> 
> 1900 kHz TXGain HP  10
> 3750 kHz TXGain HP  06
> 5336 kHz TXGain HP  08
> 7150 kHz TXGain HP  08
> 10125 kHz TXGain HP  08
> 14200 kHz TXGain HP  05
> 18110 kHz TXGain HP  05
> 21200 kHz TXGain HP  03
> 24930 kHz TXGain HP  03
> 29000 kHz TXGain HP  05
> 52000 kHz TXGain HP  04
> 
> Do you know if your 100 watt PA module
> uses RF bipolar transistors or MOSFETs
> (the KPA3A uses MOSFETs; the original KPA3
> uses bipolars)?
> I don't know if the MOSFET version has higher gain
> than the bipolars, but I suspect not.
> 
> I've been in a separate conversation
> with Hal, W7YNC, who is an LDMOS RF amplifier
> designer professionally.  There is some
> uncertainty about whether the higher TX gain
> parameters mean higher TX drive signal
> amplitude or the converse.
> 
> In any event, your TX gain values don't
> have wild swings from band to band,
> although the difference between 20
> meter and 30 meter gains is substantial.
> 
> Perhaps some others who have done
> TX gain calibrations recently (or could
> repeat them) on K3 units with the
> bipolar PA transistors could post
> their results?
> 
> 73,
> Mike, K8CN
> 
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Re: [Elecraft] K3 no transmitting

[Steve Cooke]

Jorge . my K3 displayed the same fault sometime ago .Turned out to 
be D1 on the LPA a very fine hairline crack in the solder joint 
...without Keith Trinity W6ER's advice in a previous reply to somebody 
else , I would never have found it .


            It was only visible under a bright light ...and a 
magnifying glass .


                        73 steve G1MPW.


On 08/03/2024 13:58, Jorge Diez - CX6VM wrote:

hello

My newer K3 is not TX anymore, on any mode, CW, SSB, FT8



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Re: [Elecraft] K2 Manual building method

[Clark Macaulay WU4B]

There is no engineering reason for soldering as you go a la Heathkit vs.
installing groups of components and then soldering them. I have  had both
problems mentioned by Skip in my years of building kits:  overlooked solder
joints and components in the wrong holes.  In my experience, looking for a
missed solder joint is preferable to removing a mis-installed component
that might damage the traces and/or the component.

When I built my K2 #6011 about 12 years ago, I followed the instructions in
the manual believing the beta testers of the kit were far more experienced
than me in the building process that would produce the best outcome.  I can
recall building other kits where I had soldered-on-way all of one kind of
component only to find the last remaining part was not what it should have
been. Arghhh!

In the final analysis, it’s probably a personal preference of the builder
as to which process to use. I have one of the components testers mentioned
that is invaluable in determining component values with my aging 81 year
old eyes.  Color codes on resistors made today are hard enough, and tiny
black letters on NP0 capacitors that are blue are impossible for me to
discern.

Now…enough talking and time for me to tackle one of my YUK (Yet Unbuilt
Kits).  Let the Melt Solder begin.

Clark / WU4B

Sent from Gmail Mobile


On Thu, Mar 7, 2024 at 6:41 PM Fred Jensen  wrote:

> Back in the point-to-point wiring days it was common to place a number
> of components at once, folding the leads/wires over the terminals and
> then soldering all of them.  It was said to cut down on misplaced
> components because you were focused on selecting the right components
> and placing them correctly and not interrupted by soldering.  I found it
> often led to unsoldered connections.
>
> It apparently carried over when things moved to thru-hole PCB's.  I
> found that also led to unsoldered components.  When I built my K2, I:
>
> 1.  Banned the Hoover from the shack until I was done
>
> 2.  Sorted the components into baking tins
>
> 3.  Mostly placed and soldered components individually after triple
> checking.  I'm colorblind and can't read color codes so every resistor
> was checked with the ohmmeter.  I asked my wife once to read a couple of
> color codes ... "That one is sort of a pinkish salmon, this one is a
> light mauve."  Gave up on that.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> Harold Howells wrote on 3/7/2024 11:28 AM:
> > Hello and thanks in advance for your help.  I’m just getting going on my
> K2 build and I don’t understand the reasoning behind putting all the
> capacitors in the PCB, bending their leads to hold them in place, and then
> soldering them all at the end?  This seems to me create a big mess with
> components all out of whack.  What is the reason for doing it this way?   HH
> >
> > Harold Howells
> > hhowe...@intrq.com
> >
> >
> >
> >
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>
>
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Re: [Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

Hi Ken

is not in test mode. I checked it

thanks!

Jorge

El vie, 8 mar 2024 a las 11:28,  escribió:

> Make sure your K3 didn't get put in "Test" mode, shown by a flashing "TX"
> toward the right side of the display.
>
> 73,
> Ken, KJ9B
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> On
> Behalf Of Jorge Diez - CX6VM
> Sent: Friday, March 8, 2024 8:59 AM
> To: Howard K6IA Elecraft Support ; Elecraft
> Reflector 
> Subject: [Elecraft] K3 no transmitting
>
> hello
>
> My newer K3 is not TX anymore, on any mode, CW, SSB, FT8
>
> The reception is OK, I can listen without problem, all buttons works OK, I
> cal also decode in FT8
>
> But when I want to transmit, no RF output, on any mode
>
> I do TUNE and the display show two lines ( _ _ ) and 0 W
>
> We used it in ARRLDX CW and it was working properly. Then I connected to
> remoterig for the remote station, I think we did some QSOs with no proble.
> other day I wanted to use it and noticed that it was not transmitting
>
> Any idea what could be wrong?
>
> thanks in advance!!
>
> --
> 73,
> Jorge
> CX6VM/CW5W
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> delivered to ken.k...@gmail.com
>
>

-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] K3 no transmitting

[ken.kj9b]

Make sure your K3 didn't get put in "Test" mode, shown by a flashing "TX"
toward the right side of the display.

73,
Ken, KJ9B

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Jorge Diez - CX6VM
Sent: Friday, March 8, 2024 8:59 AM
To: Howard K6IA Elecraft Support ; Elecraft
Reflector 
Subject: [Elecraft] K3 no transmitting

hello

My newer K3 is not TX anymore, on any mode, CW, SSB, FT8

The reception is OK, I can listen without problem, all buttons works OK, I
cal also decode in FT8

But when I want to transmit, no RF output, on any mode

I do TUNE and the display show two lines ( _ _ ) and 0 W

We used it in ARRLDX CW and it was working properly. Then I connected to
remoterig for the remote station, I think we did some QSOs with no proble.
other day I wanted to use it and noticed that it was not transmitting

Any idea what could be wrong?

thanks in advance!!

--
73,
Jorge
CX6VM/CW5W
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[Elecraft] K3 no transmitting

[Jorge Diez - CX6VM]

hello

My newer K3 is not TX anymore, on any mode, CW, SSB, FT8

The reception is OK, I can listen without problem, all buttons works OK, I
cal also decode in FT8

But when I want to transmit, no RF output, on any mode

I do TUNE and the display show two lines ( _ _ ) and 0 W

We used it in ARRLDX CW and it was working properly. Then I connected to
remoterig for the remote station, I think we did some QSOs with no
proble. other day I wanted to use it and noticed that it was not
transmitting

Any idea what could be wrong?

thanks in advance!!

-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] K3 Fault 6 and loss of power control

[Mike Cizek W0VTT]

Hello Pete,

This happens to my K3S regularly.  After it spent WAY too much time back at the 
mother ship three years ago without them being able to reproduce the fault (RSA 
#10260, in case Keith is reading this), I was finally able to narrow down the 
cause.  

I can reproduce the fault by going from FL2 to FL3, FL3 to FL4 or by exiting 
the QRQ mode.  This makes me think it may be a firmware problem.  I'm running 
v5.67, the most recent version.  I can't figure out how to force a load of an 
earlier version to see if that cures the problem.

Has anyone else experienced this?  I can't be the only one.

---
73,
Mike Cizek WØVTT

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Pete Smith N4ZR
Sent: Wednesday, 6 March, 2024 22:12
To: Elecraft List 
Subject: [Elecraft] K3 Fault 6 and loss of power control

Today I started seeing this in my K3 driving a KPA-1500.  It only needs around 
30-34 watts to drive it to full power on CW, but when I set the K3's power to 
that, and everything looks fine, occasionally the K3 displays Fault 6 on its 
panel and causes the KPA-1500 to fault, displaying 65 watts input on the amp's 
display and well over 1500 watts on the power bargraph.

I can't find any reference to Fault 6 in the manual for the K3 - can anyone 
clue me in?  Is something dying in the K3?

--
73, Pete N4ZR
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[Elecraft] K3/100 TX problem on 20m

[James Holohan]

Hi. I had this problem in the recent past. It turned out to be an issue with my 
multiband yagi. It only occurred on 20m.
Hope this helps.
Jim EI4HH.

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[Elecraft] [K1] was Happy 15th Birthday to my K2!

[eric norris via Elecraft]

Petr,
I agree, the K1 is also a great lttle rig!  I built mine after very invasive 
shoulder surgery many years ago.  Since I was in quite a bit of pain, on 
Vicodin around the clock--and forbidden from lifting heavy weights--I thought 
it would be a fun experiment to see if I could  build a fully-optioned K1 while 
my faculties were so dimmed.  I cheated a little, using toroids wound by 
TheToroidGuy.
Success!  And it still works FB.
After seeing Heathkit HW-8s go for $1K+ on Ebay in the past, it is no surprise 
that K1s, KX1s, and eventually K2s can fetch big money.  They're all fine 
performing radios to this day (not the HW-8).
-
Big congrats and I wish you many another DX and enjoyable QSOs with your K2.
My K2 #4800 is working like champ, and it is hard to beat. Just my K1 can 
outperform K2 regarding the noise figure, hi.
I hope that K2 will be still available and I really miss the K1 in the offer.
The popularity of K1 is evidenced by the huge price it still commands if a 
piece appears at auction or for sale somewhere.

Best regards,

73 - Petr, OK1RP
-
73, Eric NF6S

ex WD6DBM

 
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