[Elecraft] Elecraft CW Net Report

[kevin]

  Good Evening,

Conditions were poor on both bands.  Forty meters had a few storms with 
medium to deep QSB.  I am gradually learning how to control the single 
lever paddle.  If I can maintain a decent rhythm my mind doesn't switch 
to thinking about mechanics.  If I think word after word they flow 
better.  If I think letter by letter my buffer gets corrupted.



  On 1405.5 kHz at 2200z:

W0CZ - Ken - ND

NO8V - John - MI

K6XK - Roy - IA

N7ZQ - Diane - MT


  On 7047 kHz at z:

K0DTJ - Brian - CA

K6PJV - Dale - CA


   Until next week 73,

  Kevin.  KD5ONS



-



My uncle has a country place, that no-one knows about
He says it used to be a farm, before the Motor Law
Sundays I elude the ‘Eyes’, and hop the Turbine Freight
To far outside the Wire, where my white-haired uncle waits

I strip away the old debris, that hides a shining car
A brilliant red Barchetta, from a better, vanished time
Fire up the willing engine, responding with a roar!
Tires spitting gravel, I commit my weekly crime…

Wind in my hair –
Shifting and drifting –
Mechanical music
Adrenalin surge –

Well-weathered leather
Hot metal and oil
The scented country air
Sunlight on chrome
The blur of the landscape
Every nerve aware

Suddenly ahead of me, across the mountainside
A gleaming alloy air-car shoots towards me, two lanes wide
I spin around with shrieking tires, to run the deadly race
Go screaming through the valley as another joins the chase

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Re: [Elecraft] Latest status on K3 to K3s boards?

[JOHN LAWRENCE via Elecraft]

ky7k, Steve
My records say I ordered before the March 2021 deadline.  Maybe the S/N 2274 
put me into another category 
Thank you I’ll check it out further….
Thank You
73
John Lawrence W1QS


Sent from the all new Aol app for iOS


On Sunday, September 5, 2021, 8:55 PM, ky7k  wrote:

For what it’s worth...
I preordered 2 synths on April 22 and they shipped on June 11
Ky7k

Sent from my iPad

> On Sep 5, 2021, at 17:36, JOHN LAWRENCE via Elecraft 
>  wrote:
> 
> HELLO K3 owners and Elecraft Managers 
> Now that September arrived, does anyone know the latest on pre-ordered 
> synthesizer and USB board kits
> 
> 
> Thanks
> John, W1QS, exN6JL
> 
> Sent from the all new Aol app for iOS
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[Elecraft] Latest status on K3 to K3s boards?

[JOHN LAWRENCE via Elecraft]

HELLO K3 owners and Elecraft Managers 
Now that September arrived, does anyone know the latest on pre-ordered 
synthesizer and USB board kits


Thanks
John, W1QS, exN6JL

Sent from the all new Aol app for iOS
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Re: [Elecraft] Bad Ham Radio Day

[Fred Jensen]

Glad you got it working.  I've assumed that, since the K2 is a kit in 
which you build the case with pieces around the electronics, it is 
really important that they all bond well.  Especially true at 100 W.


Yes, Jim's research and publications are the go-to source for 
ferrite/chokes/baluns/transformers, and he is sometimes referred to as 
"The Reverend" around the NorCal clubs.  He is also a hands down expert 
in the audio world and in the realm of grounding/bonding.  His website 
[k9yc.com] also provides some gastronomical information as well as 
reflections on jazz. 


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 9/5/2021 7:06 AM, jerry wrote:

On 2021-09-04 19:14, Jim Brown wrote:


I'm the guy that did the original work on this, beginning in 2003,
Wow.  From the horse's mouth, so to speak.  I am reading the paper.  
Thanks, Jim!


 In addition... on the side panels, I removed the paint at each and 
every screw attachment point,

using a Dremel with an abrasive buff.  Put it back together and...

...It now works normally.  No strange behaviors, just good solid 100W RF.

    - Jerry KF6VB


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[Elecraft] Ferrite Torroid RF filters

[Ed Cole]

I used a F140-43 torroid with three turns to filter switching noise from 
my HP 226519-001 "blade" 50v 50A PS:
6m_control_panel_back_3.jpg (825×619) (kl7uw.com) 


used clamp-on ferrite filters on the 240vac hot wires.

So when I obtained a new Meanwell RSP-3000-48 switching supply to 
replace the HP, I used a similar method using two ferrite torroids sized 
for RG-8x with two clamp-on beads for good measure.  On the 48v output I 
used two torroids sized for RG8 in series with an extra loop thru them both:

http://www.kl7uw.com/6M-EME-CONTROL.jpg

I see no switching noise on my K3 that is only two foot from the PS.  
The coax beads are probably mix-31 as they are sold for the general HF 
ham market as common mode RF filters on coax lines.


The original tip for filtering the HP PS came from Lance-W7GJ who did 
many of the first conversions of the Harris ch.2 TV linears to 6m ham use.


I am building a 1200w MRF1K50H HF/6m (W6PQL) linear to replace my Harris 
to use with my K3/10 driving with 3w to the new amp.  So I will be 
running QRO on HF in a couple months.


73, Ed - KL7UW
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Re: [Elecraft] KX3 FW - N0UK tx inhibit & CW sidetone bug reproduced

[Chris Cox, N0UK]

Still hoping for some resolution to this problem since it’s now been a year 
since it was reported to and acknowledged by Elecraft as being a firmware bug.

It really renders the KX3 as fairly useless as an I/F rig for microwave 
transverters if you need the TxInhibit function.
 
Chris Cox, N0UK
chr...@chris.org



> On Oct 10, 2020, at 09:58, Drew Arnett  wrote:
> 
> I was able to reproduce the bug Chris, N0UK, reported with tx inhibit
> and CW sidetone on the KX3.
> 
> To be thorough, the FW as just installed by Elecraft, is uC 02.90
> anddsp 01.52which is the latest.
> 
> I have cabling for the ACC2 port, as I use ring contact to PTT a
> transverter and also to PTT a KXPA100.
> 
> Menus have had minimal configuration post service from elecraft, just
> enough to setup for transverter operation in the 10 GHz contest.  Mode
> is CW and VOX is on of course.
> 
> ACC2 Inhibit = Low.  I used a paddle on the KXPD paddle port (key 2).
> Was able to get the stuck sidetone as you describe while sending dits
> or sending dahs by.  (Key 2 left = dot.)  For kicks, changed to Key 2
> = hand.  Found that if the key is released before inhibit is released,
> the sidetone does not stick.  The value of inhibit when the key is
> initially asserted is not buggy. Saw the same behavior with menu
> setting inhibit high.
> 
> inhibit low
> key - inhibit - inhibit release - key release --> sidetone stuck
> key - inhibit - key release - inhibit release --> sidetone OK
> inhibit - key - inhibit release - key release --> sidetone stuck
> inhibit - key - key release - inhibit release --> sidetone OK
> 
> inhibit high
> key - inhibit - inhibit release - key release --> sidetone stuck
> key - inhibit - key release - inhibit release --> sidetone OK
> inhibit - key - inhibit release - key release --> sidetone stuck
> inhibit - key - key release - inhibit release --> sidetone OK
> 
> The behavior is a problem is in the firmware at the inhibit released event.
> 
> A thorough bug report would also include observations of the PTT
> output and actual RF output.
> 
> Best regards,
> 
> Drew
> n7da
> 
>>   6. Continuing saga with Tx Inhibit and the KX3 - possible
>>  firmware bug? (Chris Cox, N0UK)
>>  16. KX3 Tx Inhibit CW-VOX problem (Chris Cox, N0UK)
>> 
>> 
>> Message: 6
>> Date: Mon, 14 Sep 2020 16:14:57 -0500
>> From: "Chris Cox, N0UK" 
>> To: elecraft...@groups.io
>> Cc: elecraft@mailman.qth.net
>> Subject: [Elecraft] Continuing saga with Tx Inhibit and the KX3 -
>>possiblefirmware bug?
>> Message-ID: <583cb8e7-8618-4c4e-a630-8ccaacb9e...@chris.org>
>> Content-Type: text/plain;   charset=utf-8
>> 
>> Having solved the need for getting +Ve Tx Inhibit working on my KX3/10GHz 
>> Transverter integration using a mosfet switch to invert the signal and 
>> configured the KX3 for 0v Tx Inhibit, I had opportunity to test it out this 
>> afternoon.
>> 
>> The solution seemed to work fine on SSB but I now have a weird issue when 
>> using the rig on CW.
>> 
>> If I manually select transmit with the microphone PTT and then wait for the 
>> transverter sequencing to remove Tx Inhibit and then key CW with the 
>> paddles, the system works as desired.
>> 
>> If I key the system using VOX, the Tx Inhibit functions correctly, fully 
>> disabling the transmitter from producing RF until TxInhibit is removed BUT 
>> the CW sidetone becomes permanently on from the moment TXInh disappears 
>> regardless of whether I am sending or not.  It stays present until I press 
>> any of the buttons on the KX3.   This happens regardless of which band is 
>> enabled, but occurs whenever TxInhibit is present.
>> 
>> If I remove the TXInh fro the GPIO input (but leave the option enabled in 
>> the KX3 config) the rig operates normally.
>> 
>> Can anyone else replicate this oddball behavior?  It seems to be a firmware 
>> bug.  I have tried removing power but that does not alter the effect.
>> 
>> Again, all works just fine if I don?t try to key the paddles before PTT 
>> sequencing has changed over.
>> 
>> Chris Cox, N0UK
>> chr...@chris.org
>> 
>> 
>> 
>> 
>> 
>> 
>> Message: 16
>> Date: Tue, 15 Sep 2020 08:10:31 -0500
>> From: "Chris Cox, N0UK" 
>> To: elecraft@mailman.qth.net
>> Subject: [Elecraft] KX3 Tx Inhibit CW-VOX problem
>> Message-ID: <66381756-c09a-4a99-8aa5-1e015b182...@chris.org>
>> Content-Type: text/plain;   charset=utf-8
>> 
>> Having solved the need for getting +Ve Tx Inhibit working on my KX3/10GHz 
>> Transverter integration using a MOSFET switch to invert the logic level 
>> coming from the 10GHz transverter and configured the KX3 for 0v Tx Inhibit, 
>> I had the opportunity to test it out yesterday afternoon.
>> 
>> The solution seemed to work fine on SSB but I now have a weird issue when 
>> using the rig on CW.
>> 
>> If I manually select transmit with the microphone PTT (didn?t try the XMIT 
>> key) and then wait for the transverter sequencing to remove Tx Inhibit and 
>> then key CW with the paddles, the system works 

Re: [Elecraft] Bad Ham Radio Day

[jerry]

On 2021-09-04 19:14, Jim Brown wrote:


I'm the guy that did the original work on this, beginning in 2003,
Wow.  From the horse's mouth, so to speak.  I am reading the paper.  
Thanks, Jim!


 In addition... on the side panels, I removed the paint at each and 
every screw attachment point,

using a Dremel with an abrasive buff.  Put it back together and...

...It now works normally.  No strange behaviors, just good solid 100W 
RF.


- Jerry KF6VB
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Re: [Elecraft] Bad Ham Radio Day

[John Oppenheimer]

I've found preferred method for evaluating Ferrite Choke Balun common
mode rejection performance is to measure common mode rejection (CMR).

Some various 43 material examples, which demonstrate CMR is a function
of device inductance.
https://www.kn5l.net/Balun-CM/Balun-43material/

FT140-43 7T CMR measured using four different methods to ensure
correlation and correct CMR measurement process. Also demonstrate
correlation with SimSmith model using Fair-Rite Complex permeability file.
https://www.kn5l.net/Balun-CM/FT140/

Comparing 31 and 43 material which demonstrate, for a given inductance,
43 material results with improved CMR. With equal turns, 31 material has
small CMR improvement.
https://www.kn5l.net/Balun-CM/Balun31-43/

John KN5L

On 9/4/21 9:14 PM, Jim Brown wrote:
> On 9/4/2021 2:48 PM, jerry wrote:
>> 31-mix is supposed to be the hot ticket for HF common mode
>> chokes.  One turn through one core is supposed to be 98 ohms at 5MHz. So 
>> four cores should give me about 400 ohms, which should give a worthwhile 
>> attenuation in a 50 ohm system.  Thanks for the references.
> 
> I'm the guy that did the original work on this, beginning in 2003, when 
> #31 was a brand new mix. I got five of the first #31 toroids from the 
> pre-production run, a few months after I suggested that they would be 
> quite useful. My first publication was a paper to a 2005 international 
> meeting of the Audio Engineering Society, of which I'm a Fellow. First 
> publication to the ham world was RFI-Ham.pdf in 2007. And you are 
> mistaken about the value of four cores at HF. Study that paper. It's a 
> tutorial on how RFI happens and how chokes work.
> 
> 73, Jim K9YC
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