[Elecraft] Elecraft CW Net Report

[kevinr]

Good Evening,

   Propagation is improving.  Signals have gotten better over the last 
month.  Less background hiss with milder QSB.  Parts of the country do 
have a rapid flutter, which doesn't help.  I copied the KB3 station as 
KB3UDR and KB3FDR but little else.


  More dog training, winterizing efforts, yard work, and outdoor 
activity reports.  The loggers left piles of wood cut into lengths from 
6 to 20 feet.  If I can pick it up I put it into the truck to cut up 
later.  Once the rainy season begins in earnest the paths are too muddy 
to traverse.


  The sun angles were good for both nets.  I'll keep the times where 
they are for now.  The forty meter net ended just as it was getting 
dark.  Signals were good.  The twenty meter net took a while to wake 
up.  The band seemed to be moving from beginning to end.



  On 14050.5 kHz at 2200z:

NO8V - John - MI

W0CZ - Ken - ND

K6XK - Roy - IA

KB3?DR -

AB9V - Mike - IN


  On 7047.5 kHz at 0045z:

W0CZ - Ken - ND

K0DTJ - Brian - CA

K6PJV - Dale - CA

K6XK - Roy - IA

AE6JV - Bill - NH

W8OV - Dave - TX


  Until next week, enjoy autumn, and 73,

 Kevin.  KD5ONS

-



Generally, you don't see that kind of behavior in a major appliance

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Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500

[Jim Brown]

Hmmm. I've used nothing but a CM500 since about 2008, and I've never 
seen one with a dynamic mic. The data sheet for all of them has said it 
was dynamic, but none of then were.


73, Jim K9YC

On 11/1/2020 6:05 PM, JP Douglas wrote:

 From my experience, some of the CM-500s have an electret mic and others a 
dynamic mic. I don’t know if its an age factor.


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Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500

[Walter Underwood]

The Koss SB-40 apears to be the same headset as the Yamaha CM-500
but with a dynamic mic. The mic plug on my first CM-500 said “KOSS”,
so I’m pretty sure the only difference is the microphone.

I’ve heard complaints about the dynamic mic on the SB-40.

https://www.amazon.com/Koss-SB40-Computer-Headset-Microphone/dp/B5ML7T 


The CM-500 does not need an adaptr to be used with the KX3. Turn off 
the mic button menu setting and plug it in. If you want to get fancy, a regular
stereo-to-mono splitter will separate the logic bias from the mic bias for a 
cleaner, higher-level mic signal.

https://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/
 


wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Nov 1, 2020, at 6:05 PM, JP Douglas  wrote:
> 
> From my experience, some of the CM-500s have an electret mic and others a 
> dynamic mic. I don’t know if its an age factor.
> I use mine with my YAESU FT-897 and with my Kenwood TS-480, don’t have the 
> adapter at this point to use with the KX3...Pretty good for an in-expensive 
> boom mic.
> 73 de Jose Douglas KB1TCD
> 
> Sent from my iPad
> 
>> On Nov 1, 2020, at 8:40 PM, Walter Underwood  wrote:
>> 
>> I tried a Koss SB-45 headset and hated it. It gets good reviews from hams 
>> and has
>> an electret mic, but it was not comfortable at all. It sat on top of my ears 
>> instead of 
>> around my ears, plus it grabbed my head more tightly than the Yamaha CM-500. 
>> Finally, the mic boom was not as easy to position.
>> 
>> I sent it back and ordered a new Yamaha CM-500. I haven’t noticed any major
>> differences between the new one and my eight year old one (wires broke on 
>> that one).
>> The mic boom pivot is stiffer on the new one, but that could easily be a 
>> normal
>> manufacturing variation.
>> 
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>> 
>>> On Nov 1, 2020, at 2:12 PM, Bill Frantz  wrote:
>>> 
>>> The boom mic on my CM-500 is now flopping around held only by the signal 
>>> wire.
>>> 
>>> Any ideas about how to reattach it?
>>> 
>>> What are the best replacement headsets these days. Someone said that the 
>>> CM-500 has changed for the worse in the last few years.
>>> 
>>> Any other advice?
>>> 
>>> 73 Bill AE6JV
>>> 
>>> ---
>>> Bill Frantz| Security is like Government  | Periwinkle
>>> (408)348-7900  | services. The market doesn't | 150 Rivermead Rd #235
>>> www.pwpconsult.com | want to pay for them.| Peterborough, NH 03458
>>> 
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>> 
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Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500

[JP Douglas]

From my experience, some of the CM-500s have an electret mic and others a 
dynamic mic. I don’t know if its an age factor.
I use mine with my YAESU FT-897 and with my Kenwood TS-480, don’t have the 
adapter at this point to use with the KX3...Pretty good for an in-expensive 
boom mic.
73 de Jose Douglas KB1TCD

Sent from my iPad

> On Nov 1, 2020, at 8:40 PM, Walter Underwood  wrote:
> 
> I tried a Koss SB-45 headset and hated it. It gets good reviews from hams 
> and has
> an electret mic, but it was not comfortable at all. It sat on top of my ears 
> instead of 
> around my ears, plus it grabbed my head more tightly than the Yamaha CM-500. 
> Finally, the mic boom was not as easy to position.
> 
> I sent it back and ordered a new Yamaha CM-500. I haven’t noticed any major
> differences between the new one and my eight year old one (wires broke on 
> that one).
> The mic boom pivot is stiffer on the new one, but that could easily be a 
> normal
> manufacturing variation.
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Nov 1, 2020, at 2:12 PM, Bill Frantz  wrote:
>> 
>> The boom mic on my CM-500 is now flopping around held only by the signal 
>> wire.
>> 
>> Any ideas about how to reattach it?
>> 
>> What are the best replacement headsets these days. Someone said that the 
>> CM-500 has changed for the worse in the last few years.
>> 
>> Any other advice?
>> 
>> 73 Bill AE6JV
>> 
>> ---
>> Bill Frantz| Security is like Government  | Periwinkle
>> (408)348-7900  | services. The market doesn't | 150 Rivermead Rd #235
>> www.pwpconsult.com | want to pay for them.| Peterborough, NH 03458
>> 
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> 
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Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500

[Walter Underwood]

I tried a Koss SB-45 headset and hated it. It gets good reviews from hams and 
has
an electret mic, but it was not comfortable at all. It sat on top of my ears 
instead of 
around my ears, plus it grabbed my head more tightly than the Yamaha CM-500. 
Finally, the mic boom was not as easy to position.

I sent it back and ordered a new Yamaha CM-500. I haven’t noticed any major
differences between the new one and my eight year old one (wires broke on that 
one).
The mic boom pivot is stiffer on the new one, but that could easily be a normal
manufacturing variation.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Nov 1, 2020, at 2:12 PM, Bill Frantz  wrote:
> 
> The boom mic on my CM-500 is now flopping around held only by the signal wire.
> 
> Any ideas about how to reattach it?
> 
> What are the best replacement headsets these days. Someone said that the 
> CM-500 has changed for the worse in the last few years.
> 
> Any other advice?
> 
> 73 Bill AE6JV
> 
> ---
> Bill Frantz| Security is like Government  | Periwinkle
> (408)348-7900  | services. The market doesn't | 150 Rivermead Rd #235
> www.pwpconsult.com | want to pay for them.| Peterborough, NH 03458
> 
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Re: [Elecraft] K3 not transmitting CW?

[David F. Reed]

Thanks Mike; VOX was the answer...

On 11/2/2020 00:27, Mike Flowers wrote:

VOX on?

Key working?

-- 73 de Mike Flowers, K6MKF, NCDXC - "It's about DX!"


On Nov 1, 2020, at 4:24 PM, David F. Reed  wrote:

just tried to work TX0T on cw, only to find no output...

power is set normally (Tune produces full output)

but when I key, it acts like it is in TEST mode, but I can confirm it is not...

Any clues out there for me?

Thanks & 73 de Dave, W5SV

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[Elecraft] K3 not transmitting CW?

[David F. Reed]

just tried to work TX0T on cw, only to find no output...

power is set normally (Tune produces full output)

but when I key, it acts like it is in TEST mode, but I can confirm it is 
not...


Any clues out there for me?

Thanks & 73 de Dave, W5SV

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Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500

[Jack Brindle via Elecraft]

I bought a new CM-500 set on Amazon about two years ago. They feel great on my 
head and work wonderfully. 
In May I decided to try the Koss SB-45. Price was good (about $30 from Amazon). 
They feel very similar to my Heil headset, meaning about the same as putting my 
head in a vise. Simply too tight on my head, especially for wearing them 
through a 48 hour contest. I went back to the CM-500s. I find it worth paying 
the $60 from Amazon to get these instead of something else.

73!
Jack, W6FB


> On Nov 1, 2020, at 2:20 PM, Jim Brown  wrote:
> 
> On 11/1/2020 2:12 PM, Bill Frantz wrote:
>> What are the best replacement headsets these days. Someone said that the 
>> CM-500 has changed for the worse in the last few years.
> 
> Hi Bill,
> 
> The only issue I've ever had with the CM500 has been a bad cable, and it's 
> happened at least twice. I'm pretty clutzy, so hard on headsets.
> 
> This piece I wrote for National Contest Journal several years ago includes 
> model numbers a few Koss headsets that hams have liked. They're pretty much 
> the same electrically.
> 
> http://k9yc.com/ContestAudio.pdf
> 
> 73, Jim K9YC
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Re: [Elecraft] [OT] Broken boom mic attachment on a CM-500

[Jim Brown]

On 11/1/2020 2:12 PM, Bill Frantz wrote:
What are the best replacement headsets these days. Someone said that the 
CM-500 has changed for the worse in the last few years.




Hi Bill,

The only issue I've ever had with the CM500 has been a bad cable, and 
it's happened at least twice. I'm pretty clutzy, so hard on headsets.


This piece I wrote for National Contest Journal several years ago 
includes model numbers a few Koss headsets that hams have liked. They're 
pretty much the same electrically.


http://k9yc.com/ContestAudio.pdf

73, Jim K9YC
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[Elecraft] [OT] Broken boom mic attachment on a CM-500

[Bill Frantz]

The boom mic on my CM-500 is now flopping around held only by 
the signal wire.


Any ideas about how to reattach it?

What are the best replacement headsets these days. Someone said 
that the CM-500 has changed for the worse in the last few years.


Any other advice?

73 Bill AE6JV

---
Bill Frantz| Security is like Government  | Periwinkle
(408)348-7900  | services. The market doesn't | 150 
Rivermead Rd #235
www.pwpconsult.com | want to pay for them.| 
Peterborough, NH 03458


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[Elecraft] SSB Net November 1. 2020

[Eric Lanzl]

Here is the list of stations checking in to the Sunday net. The nets take place 
at 1800Z, 1900Z and at 0100Z. It is an hour earlier with the time change. 
Thank you to the relay stations for their help. 
Hope to hear you on one of the nets. Eric WB9JNZ

Call Name  State   Radio   Serial #   QRP   
  Notes

WB9JNZ   Eric    IL    K3   
4017   NetControl

K8NU/7   Carl    OH/WA   Yaesu FT  2000 
  

KC1ACL    Steve    NM   KX3    10677
    

NS7P Phil    OR K3  
 1826      Relay 
Station 
N4NRW   Roger   SC  K3   1318   
       Relay Station 
NC0JW Jim CO KX3    
1356    Relay 
Station 
N7BDL  Terry AZ  K3S    
10373    

W1NGA   Al   CO Flex   
6400M  

AB7CE  Roy    MT    K2/100  40  
     

W7QHD   Kurt   AZ  K2/100  1538 
  

WM6P  Steve    GA K3S    11453  
  

ZL1PWD   Peter    NZ K3   139   
  

AE6JV   Bill  NH K3 
  6299   

W4DML   Doug TN K3   6433   
    

K7TPH  Nicky    ID   KX3    
10010    

K1NW   Brian RI   K3   
4974   

K7BRR  Bill  AZ  K3S    
10939    

K6VWE Stan  MI K3   650 
    

NK9A    Stan  MI Yaesu    757   
  

W5JP    Bart   TX  K3   
2106   

KI5JTI    Brian TX  Kenwood    TS440S   
   

KB9AVO  Paul   IN  K3S    11103 
   

 

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[Elecraft] WTB: Fairly Basic K3 or Possibly K3S

[Dave]

I’m looking for a basic K3-100, preferably factory built. (Not a deal breaker 
though) No second RX is required nor is the ATU. The KXV3 option is required. I 
would be most interested in a radio with CW filtering and perhaps the 6Khz AM 
filter. I’m just looking for a basic K3 at a reasonable price. The new 
synthesizer board would be a plus, but not a requirement. Please e-mail me 
off-list at n...@comcast.net. Please include serial number and price shipped to 
44870.

If you are holding onto your K3 until your K4 gets close to shipping, I am not 
in immediate need of the K3/K3S. If that’s the case, let me know.

Tnx es 73,
Dave  N8AG

Sent from Mail for Windows 10

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Re: [Elecraft] KIO3B Main Board Repair

[Edward R Cole]

In my case the RS232 I/F in my K3 (SN-4340) quit communicating with 
WSJT-X.  Tested with K3 Utility with same result.  Tried a different 
USB/RS232 cable, still not communicating.  Troubleshot 9-pin 
receptacle and discovered the ground pin was not grounded.  Pulled 
out the KIO3A and found the chip inductor on the ground line had 
blown up open ckt.  Removed it and substituted a wire jumper (still 
not working).


At that point I was going to have to rig up a test cable to be able 
to troubleshoot the module unplugged from the K3.  Instead I sent it 
to Elecraft Repair.  They had it for 28-days and then replied that a 
new digital board was needed as the existing board was not 
reparable.  They are on order.


I did have the option to buy a KIO3B but that was over $400 before 
shipping (and also not in stock)  I don't need or use the USB port.


I worked 1966-2009: ten years as an RF engineer, and the rest as 
technician doing SM level troubleshooting/repairs.  After retiring I 
had a small business building transverters and amplifiers from kits 
(all SM).  I have a pretty decent workbench and test equipment to 
26-GHz.  II could have spent the effort in building a test jig and 
trying to troubleshoot on my own.  I figured it easier to let the 
experienced staff at Elecraft do it.


Hoping to get my KIO3A repaired when board order arrives.  I've 
decided to set up my KX3 for computer modes using a Rig Runner NOMIC 
I/F.  I'll post the project on my website when done.  The KX3 will 
use WSJT-X for running JT65B on 2m-eme by driving a 2m transverter. 
on 28-MHz with 3w.


73, Ed - KL7UW

-
You can view the Schematic diagrams (6 pages) for the Elecraft KIO3B module.
https://ftp.elecraft.com/K3S/Manuals%20Downloads/E740323%20K3s%20Schematic%20Files.pdf
The KIO3B is a multi-function module, that includes these functions:
1. RF Board interface
2. Digital I/O interface
3. Audio I/O interface
4. USB, Codec, RS232
FTDI FT232R (USB), TI PCM2901 (CODEC), TUSB2036 (2/3 port USB hub)
5. Digital I/O
6. Audio I/O
==
It is NOT impossible to repair or troubleshoot (component-level),
BUT it can be time consuming for the novice or weekend technician.
This is why Elecraft stated ?economical? (their bench time is NOT Free).
?
Sage advice from my high school electronics instructor, WB9FUR (sk, 
2016) has served me well : External event (ESD, Over-voltage, Op 
error) and I/O ports are major causes of module or circuit 
failures.  Electronic devices rarely ?die? for no reason (assumes QA 
production of part).

?
?What functionality? has failed will narrow the circuit areas and 
components to examine.  IF you can ?think thru? those observed 
symptoms, many failures can be pinpointed with a DVM to a few key components.

SMT repair experience and tools reduces repair time


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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[Elecraft] KXV144 maximum RX input power?

[aj4tf]

I'm thinking about rearranging some of the 2m antenna cabling (sharing
antennas) and I am wondering if there is a maximum input power rating on the
KXV144 receiver.

73,  David AJ4TF 
K3S 10669



--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] K3S Shutdown

[Lou Mecseri]

how old is your power supply capacitor?

Check your voltage with a VOM at the PS terminal and at the internal K3 
Volt meter.


73, Lou KE1F

On 11/1/2020 6:15 AM, Bob DeHaney wrote:

Station is in Standby, just listening when suddenly the K3S just turns off.  It 
turns on afterwards normally. Linear Power Supply is working (30Amp) and is 
still on.  NO RF being generated.

Any ideas?

  


Vy 73 de Bob DJ0RD

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[Elecraft] K3S Shutdown

[Bob DeHaney]

Station is in Standby, just listening when suddenly the K3S just turns off.  It 
turns on afterwards normally. Linear Power Supply is working (30Amp) and is 
still on.  NO RF being generated.

Any ideas?

 

Vy 73 de Bob DJ0RD

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Re: [Elecraft] HI CUR on 40

[Jim Brown]

On 10/31/2020 6:07 PM, David Olean wrote:
I would put the ferrite at the end of the coax before it goes into the 
rig if there were rf coming down the coax. Common mode energy can and 
will get on the outside of the coax. I am not an expert on this,
I AM an expert on this. :) The most important place for a choke in any 
antenna system is at the feedpoint. It's function is to prevent the 
feedline from becoming part of the antenna by adding a very high common 
mode impedance to the common mode circuit. The only good reasons for a 
choke elsewhere along the line are


1) to prevent the feedline from becoming a parasitic element of another 
antenna; for example, I choke the coax feedlines to my high (125 ft) 
dipoles for 80 and 40 so that they do not become parasitic to my three 
160M verticals. e


2) to prevent coupling shield current by a mechanism quantified as the 
"transfer impedance" of the coax shield. It is the ratio of the 
differential voltage generated inside the coax as a result of shield 
current. Its unit is Ohms, lower is better, and the lower limit is the 
RF resistance of the shield at the frequency of interest. But the 
quality, density, and uniformity of the shield makes an additive 
contribution -- a poor quality shield increases the transfer impedance.


Both of these measures minimize inter-station interference, both in-band 
and cross-band. W6GJB's contesting trailer has antennas for 15, 20, 40, 
and 80 supported on a single pneumatic mast, with their feedpoints 
within about 2 ft of each other. Because they are very effectively 
choked, and because we have dual stubs on the outputs of the power amps 
for the two stations, we can operate on adjacent bands at 500W 
(K3/KPA500) with minimal interference from the lower frequency station's 
harmonics to the higher frequency station. One day, Glen rebuilt the 
connection at the antenna and accidentally left out the choke, and the 
interstation interference was terrible.


A choke at the rig is only a band-aid for failure to do proper grounding 
and bonding in the shack and throughout the house. See N0AX's ARRL book 
on the topic, on which I collaborated, or the slides for my tutorial 
talk at Pacificon, Visalia, and to various ham clubs.

http://k9yc.com/GroundingAndAudio.pdf

The half-wave section of line you described in an earlier post may take 
care of the feedpoint for one band (and it may not be as effective as a 
well-designed choke), but it's not a solution for other bands. Properly 
designed chokes can cover multiple adjacent bands. See 
http://k9yc.com/2018Cookbook.pdf


73, Jim K9YC


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