[Elecraft] Elecraft CW Net Report

[kevinr]

Good Evening,

   As I had suspected twenty meters was filled with contesters. Signals 
receded into the distance like grain elevators on the plains of Kansas.  
I scanned from 14003 to 14110 kHz without finding a gap.  So I went back 
to writing code.


   Forty meters was open after the contest closed down.  QSB ranged 
from moderate to weak.  Noise levels kept dropping as time passed.  I 
wasn't expecting to reach far on forty; I had been checking with RBN all 
week with no signals east of the Rockies. Twenty meters was better with 
reports from the Maritimes of Canada to Florida, North Carolina, 
Connecticut, New York and many points west.


   The forecast is for sunny, dry weather most of the week.  I will 
cut, build, and hang a new antenna by the weekend.  If all goes well I 
will replace the second antenna too.  Then I can celebrate the 19th 
anniversary of the Elecraft CW Net next week with fresh copper.



  On 7048 kHz at z:

WM5F - Dwight - ID

K6PJV - Dale - CA

K0DTJ - Brian - CA



   Until next week 73,

  Kevin.  KD5ONS


-





    Presently my soul grew stronger; hesitating then no longer,
    “Sir,” said I, “or Madam, truly your forgiveness I implore;
    But the fact is I was napping, and so gently you came rapping,
    And so faintly you came tapping, tapping at my chamber door,
    That I scarce was sure I heard you”—here I opened wide the door;—
    Darkness there and nothing more.

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] Elecraft 20 SSB Net - Sunday, May 30, 2021

[Jim White]

Memorial Day Weekend edition the Elecraft SSB Net had 19 checkins.  T-storm 
static here in Colorado Springs made things a bit difficult.  Relay stations 
were once again a tremendous help.  Thanks to Brian K1NW, Steve WM6P, and Phil 
NS7P for your assistance.  Good to hear John N6JW joining us today.

N6JWJohnCA  KX3 515 Portable
AE6JV   BillNH  K3  6299
KB9AVO  PaulIN  K3S 11103
WM6PSteve   GA  K3S 11453   Relay Station
W1NGA   Al  CO  Flex 6400M
K2VJK   VernNY  K3S 10151
NS7PPhilOR  K3  1826Relay Station
K1NWBrian   RI  K3  4974Relay Station
N7BDL   Terry   AZ  K3S 10373
WW4JF   JohnTN  K3S 11177
KB3FBR  Joe PA  K2  6178
KO5VJim NM  K2  7225
N0MPM   MikeIA  K3S 10514
W3OYRay PA  ICOM 718
K5PDPeteTX  K3  545
W9PCS   PaulWI  K3S 11603
K6WDE   DaveCA  KX3 4599
W6CMS   Brian   CA  Yaesu FT-891
NC0JW   Jim CO  KX3 1356

The Sunday Elecraft SSB Nets begin with the 20 Meter Net at 1800 UTC on or 
about 14.3035 MHz with Eric WB9JNZ as Net Control in Chicago. The 40 Meter SSB 
net follows at 1900 UTC with Steve WM6P in Georgia serving as net control on 
7.280 MHz.  At 0100 UTC the 80 Meter SSB Net meets on 3.775 MHz with Net 
Control Paul KB9AVO from Indiana.  We employ several relay stations located 
around the continental USA to assist with check ins.  As conditions permit we 
take questions and comments after check ins.

Give one or all of the SSB nets a try next Sunday.

Jim White - NC0JW
ars.nc...@gmail.com




__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] K4 remote; how easy to set up?

[Macy monkeys]

I understand the K4 can be remotely controlled by another K4 via a direct 
ethernet connection. How easy is this accomplished with the K4? Is the 
operation on CW and SSB seamless provided a decent connection is available? 

I may wish to remote between two homes at some point and having the remote K4 
operate exactly like I was sitting in front of one at home is what I want. I 
accomplished this with the Remote Rig boxes and my TS-480SAT but that was long 
ago. 

I only need the K4 for operating CW and SSB ragchews. I need to be able to plug 
a mic, key, or bug into the remote K4. I need to spin the VFO and tune around. 
Just like I was sitting in front of the one at home connected to the antenna. I 
ragchew a bit, listen a lot, and that's it. 

I'm looking for SIMPLE. I needs it to be EASY to set up. I'm not into in-depth 
techno geek BS. I can configure the router if given exact instructions. My 
brain and vision are not what they used to be :)

John K7FD
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[Jack Brindle via Elecraft]

James;

I think you missed Dick's point. The ATU should have a signal that indicates 
when it needs to do a tune (or is doing one). Simply use that signal to operate 
a relay. That relay either passes the Keyout signal to the PA (normal), or 
opens the relay to unkey the PA (tuning). That is exactly what the KAT500 does 
with the KPA, or any other PA it operates with.

This is a very simple, and elegant automatic solution.

73,
Jack, W6FB

> On May 30, 2021, at 9:34 AM, James Beitchman  
> wrote:
> 
> Thanks, Dick,
> 
> But here is the real issue, not reported in my post. 
> 
> My antenna - my only antenna - is a non-resonant 600 foot square loop which 
> provides amazing performance especially on high bands. It presents SWRs that 
> are higher than the no-foldback limits of the KPA1500.  I believe that limit 
> is 5:!.  So, frankly speaking I was planning on an amp with no built-in ATU 
> followed by a wide range automatic ATU (ATK) that can handle my SWR  (total 
> cost of amp + ATU well less than KPA1500).  And I want to do exactly what 
> you described: have the ATU tune using low K3 power and then switch in the 
> amp.  To do this would require getting RF power from the K3 without 
> activating the PTT (used to control the amp), then activating the PTT.  This 
> is for remote operation from my home in NYC to my shack/country place upstate 
>  ( K3/0 mini and RemoteRig plus K3 plus internet controlled relay since 
> 2016),. The problem could be solved with a toggle switch in the shack opening 
> the PTT line, but not for remote.  Thus my question of whether it is possible 
> to get RF from the K3 w/o activating PTT.
> 
> Thanks again for your attention to this matter.
> 
> 73
> 
> Buzz   
> 
> -Original Message-
> From: Dick Dievendorff mailto:d...@elecraft.com>> 
> Sent: Sunday, May 30, 2021 12:08 PM
> To: James Beitchman  >
> Cc: Elecraft@mailman.qth.net 
> Subject: Re: [Elecraft] Can the K3 make power without activating Key Out?
> 
> Buzz: Our KAT500 and KPA1500 antenna tuners interrupt the key line with a 
> relay for ATU tuning (which is done at exciter power, as we can’t hot switch 
> ATU relays at QRO and amps don’t deal well with the SWR swings encountered 
> during ATU tune). The K3, like most exciters, does pull down the KEY PTT line 
> just before transmitting RF; we just keep that from reaching the amp.  This 
> technique works with a lot of exciters, without a need to modify them to emit 
> RF without pulling down the KEY line.
> 
> Our KPA1500 ATU tune button interrupts the amp key line, (putting the PA in 
> standby temporarily) and can be configured to send a message to K3 or K4 to 
> start tune level RF.  When ATU tune is complete, the amp sends a message to 
> the exciter to cease sending RF, and after RF level drops, the amp restores 
> the key line interrupt relay.
> 
> 73 de Dick, K6KR
> 
>> On May 30, 2021, at 07:32, James Beitchman  wrote:
>> 
>> I think the answer is no, but I'll ask this question anyway. 
>> 
>> 
>> 
>> The station configuration is K3 followed by amp followed by automatic 
>> antenna coupler, where the Key Out line of the K3 is used to switch 
>> the amp inline.
>> 
>> 
>> 
>> I would like to generate RF from the K3 without switching the amp 
>> inline in order to operate the automatic antenna coupler at low power 
>> from the K3 before putting the amp inline.  This mean generating RF 
>> from the K3 without activating the Key Out line. Is there any way to do that 
>> using K3 controls?
>> 
>> 
>> 
>> 73,
>> 
>> 
>> 
>> Buzz
>> 
>> W3EMD
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> --
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net Please help support this email 
>> list: http://www.qsl.net/donate.html Message delivered to 
>> d...@elecraft.com 
> 
> 
> -- 
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus 
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to jackbrin...@me.com 

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[Geert Jan de Groot]

On 30/05/2021 19:42, elecraft-requ...@mailman.qth.net wrote:

The problem could be solved with a toggle switch in the shack opening the PTT 
line, but not for remote.  Thus my question of whether it is possible to get
   RF from the K3 w/o activating PTT.


I wonder if the DIGOUT1 output of the ACC connector can be made to do 
what you want: drive a relay that interrupts the KEYOUT line.


Alternative (and perhaps more expensive): The KPOD has 3 outputs that 
can be switched using serial commands. If you try this, be aware that 
the documentation of the KPOD is (or was) wrong: tip is output3, not 
output1, and vice versa.


If you want to use this to drive a relay you probably want a PNP 
transistor as buffer.


73, Geert Jan PE1HZG
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] 40 meter SSB net 5-30-21

[Steve Hall]

The band was very weak today.  Few stations seen on the band.
Thanks to my relay stations.

WM6P STEVE GA K3S NETCONTROL
K8NU CARL OH FTDX101
NC0JW JIM CO KX3
WY3T TIM FL (REMOTE IN TN) K3S
K5PD PETE TX K3
K2VJK VERN NY K3
KB9AVO PAUL IN K3S
KB3FBR JOE PA K2
N0MPM MIKE IA K3S
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[hdv]

Hi Buzz,

So the issue is how to prevent PA PTT while in low power mode.
In case you could just switch a remote relay which yes/no passes the PA PTT 
signal you are all set.

You could use the switch capacity of the Remoterig boxes and activate a relay 
remotely. 
Remoterig provides a web-based switch (see manual)

You could also use one of the Remoterig COMM ports. 
This circumvents the need for a PC, just a switch can be used.

I do use COMM1 CTS as (control) input and have at the radio COMM1 RTS as output.
At the control side I have added a MAX232 so I can use a switch to ground at 
the MAX232 input. (output to COMM1 CTS)

At the radio side RTS goes to a simple transistor relay driver.
You can use the remote relay for anything you want, so also PA PTT control.

In case you need more specifics just send me a mail off list.

73 Henk
PA0C 

-Oorspronkelijk bericht-
Van: elecraft-boun...@mailman.qth.net  Namens 
James Beitchman
Verzonden: zondag 30 mei 2021 18:35
Aan: 'Dick Dievendorff' 
CC: Elecraft@mailman.qth.net
Onderwerp: Re: [Elecraft] Can the K3 make power without activating Key Out?

Thanks, Dick,

But here is the real issue, not reported in my post. 

My antenna - my only antenna - is a non-resonant 600 foot square loop which 
provides amazing performance especially on high bands.  It presents SWRs that 
are higher than the no-foldback limits of the KPA1500.  I believe that limit is 
5:!.  So, frankly speaking I was planning on an amp with no built-in ATU 
followed by a wide range automatic ATU (ATK) that can handle my SWR  (total 
cost of amp + ATU well less than KPA1500).  And I want to do exactly what you 
described: have the ATU tune using low K3 power and then switch in the amp.  To 
do this would require getting RF power from the K3 without activating the PTT 
(used to control the amp), then activating the PTT.  This is for remote 
operation from my home in NYC to my shack/country place upstate  ( K3/0 mini 
and RemoteRig plus K3 plus internet controlled relay since 2016),. The problem 
could be solved with a toggle switch in the shack opening the PTT line, but not 
for remote.  Thus my question of whether it is possible to get RF from the K3 
w/o activating PTT.

Thanks again for your attention to this matter.

73

Buzz   

-Original Message-
From: Dick Dievendorff 
Sent: Sunday, May 30, 2021 12:08 PM
To: James Beitchman 
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Can the K3 make power without activating Key Out?

Buzz: Our KAT500 and KPA1500 antenna tuners interrupt the key line with a relay 
for ATU tuning (which is done at exciter power, as we can’t hot switch ATU 
relays at QRO and amps don’t deal well with the SWR swings encountered during 
ATU tune). The K3, like most exciters, does pull down the KEY PTT line just 
before transmitting RF; we just keep that from reaching the amp.  This 
technique works with a lot of exciters, without a need to modify them to emit 
RF without pulling down the KEY line.

Our KPA1500 ATU tune button interrupts the amp key line, (putting the PA in 
standby temporarily) and can be configured to send a message to K3 or K4 to 
start tune level RF.  When ATU tune is complete, the amp sends a message to the 
exciter to cease sending RF, and after RF level drops, the amp restores the key 
line interrupt relay.

73 de Dick, K6KR

> On May 30, 2021, at 07:32, James Beitchman  wrote:
> 
> I think the answer is no, but I'll ask this question anyway. 
> 
> 
> 
> The station configuration is K3 followed by amp followed by automatic 
> antenna coupler, where the Key Out line of the K3 is used to switch 
> the amp inline.
> 
> 
> 
> I would like to generate RF from the K3 without switching the amp 
> inline in order to operate the automatic antenna coupler at low power 
> from the K3 before putting the amp inline.  This mean generating RF 
> from the K3 without activating the Key Out line. Is there any way to do that 
> using K3 controls?
> 
> 
> 
> 73,
> 
> 
> 
> Buzz
> 
> W3EMD
> 
> 
> 
> 
> 
> 
> 
> --
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to 
> d...@elecraft.com


--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message 
delivered to 

Re: [Elecraft] KPA500 cabinet buzz

[Eric Norris]

I didn't say " a hair's width," I said "a hair," a technical term
understood by OFs as an approximation.  I also didn't say "pinch the ribbon
cable," because that is not the side of the cabinet where the problem lies
in my experience.

Now, are you guys telling me there is an actual wing-nut on the KPA500
transformer hold-down bolt on modern units?  If so, forget the torque
wrench and try tightening the wing-nut a hair--after following all safety
precautions outlined in the manual or my OP.

By all means refer to the original KPA500 Assembly Manual.

Good luck, pilgrim.

73 Eric WD6DBM

A Mr Richard Fedder of Fort Wayne, N.J. wrote:

> The KPA-500 transformer should be more than just a "hair" away from sides
> (step 6 above) as there are rubber bumpers and a ribbon cable between that
> should NOT be pinched.  Refer to Kit Assembly Instructions page 35 and
> figure 52...
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[James Beitchman]

Thanks, Dick,

But here is the real issue, not reported in my post. 

My antenna - my only antenna - is a non-resonant 600 foot square loop which 
provides amazing performance especially on high bands.  It presents SWRs that 
are higher than the no-foldback limits of the KPA1500.  I believe that limit is 
5:!.  So, frankly speaking I was planning on an amp with no built-in ATU 
followed by a wide range automatic ATU (ATK) that can handle my SWR  (total 
cost of amp + ATU well less than KPA1500).  And I want to do exactly what you 
described: have the ATU tune using low K3 power and then switch in the amp.  To 
do this would require getting RF power from the K3 without activating the PTT 
(used to control the amp), then activating the PTT.  This is for remote 
operation from my home in NYC to my shack/country place upstate  ( K3/0 mini 
and RemoteRig plus K3 plus internet controlled relay since 2016),. The problem 
could be solved with a toggle switch in the shack opening the PTT line, but not 
for remote.  Thus my question of whether it is possible to get RF from the K3 
w/o activating PTT.

Thanks again for your attention to this matter.

73

Buzz   

-Original Message-
From: Dick Dievendorff  
Sent: Sunday, May 30, 2021 12:08 PM
To: James Beitchman 
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Can the K3 make power without activating Key Out?

Buzz: Our KAT500 and KPA1500 antenna tuners interrupt the key line with a relay 
for ATU tuning (which is done at exciter power, as we can’t hot switch ATU 
relays at QRO and amps don’t deal well with the SWR swings encountered during 
ATU tune). The K3, like most exciters, does pull down the KEY PTT line just 
before transmitting RF; we just keep that from reaching the amp.  This 
technique works with a lot of exciters, without a need to modify them to emit 
RF without pulling down the KEY line.

Our KPA1500 ATU tune button interrupts the amp key line, (putting the PA in 
standby temporarily) and can be configured to send a message to K3 or K4 to 
start tune level RF.  When ATU tune is complete, the amp sends a message to the 
exciter to cease sending RF, and after RF level drops, the amp restores the key 
line interrupt relay.

73 de Dick, K6KR

> On May 30, 2021, at 07:32, James Beitchman  wrote:
> 
> I think the answer is no, but I'll ask this question anyway. 
> 
> 
> 
> The station configuration is K3 followed by amp followed by automatic 
> antenna coupler, where the Key Out line of the K3 is used to switch 
> the amp inline.
> 
> 
> 
> I would like to generate RF from the K3 without switching the amp 
> inline in order to operate the automatic antenna coupler at low power 
> from the K3 before putting the amp inline.  This mean generating RF 
> from the K3 without activating the Key Out line. Is there any way to do that 
> using K3 controls?
> 
> 
> 
> 73,
> 
> 
> 
> Buzz
> 
> W3EMD
> 
> 
> 
> 
> 
> 
> 
> --
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> d...@elecraft.com 


-- 
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] KPA500 cabinet buzz

[Andy Durbin]

"The KPA-500 transformer should be more than just a "hair" away from sides 
(step 6 above) as there are rubber bumpers and a ribbon cable between that 
should NOT be pinched. "

Over the production life of the KPA500 the transformer design, and perhaps the 
supplier, have changed several times.  The transformer supplied with my kit was 
significantly larger in diameter that the one shown in the assembly manual 
photos.  The only way I could ensure clearance was to shim the transformer 
before tightening the bolt and remove the shims afterwards.  There is very 
little clearance, perhaps 2 cereal box thicknesses, but I didn't record the 
shim stack.

Andy, k3wyc
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] K4 Highlights #1: Stereo Audio Pitch Mapping

[Wayne Burdick]

This is the first in an occasional series that will highlight one K4 operating 
control or other feature. K4 owners are encouraged to give the examples a try, 
allowing them to gradually become more familiar with the transceiver's 
capabilities -- including some they may have missed.

* * *

K4 Highlights #1:   Stereo Audio Pitch Mapping

Working in CQ WPX this weekend, I was reminded of the "wall of sound" effect 
you can experience during a CW contest. This was the motivation behind the K4's 
AFX PITCH feature (pitch-mapping audio effect). 

While AFX PITCH can be used in other modes, it really shines in CW mode, 
especially when wider bandwidths are used (800 Hz and up). What it does is 
"map" lower-pitched signals to the left, and higher-pitched signals to the 
right. All it takes is a little DSP magic.

Here's one way to think of it: 

Imagine you're listening to a great jazz ensemble using mono headphones. Yes, 
you can hear all the instruments, but your brain does a lot of extra work in 
separating them. Now put yourself near center stage in an actual performance 
venue: the performers surround you, with each instrument's voice standing out 
distinctly thanks to binaural hearing. 

This is what happens when you turn K4 pitch mapping on. The effect with 
headphones on is dramatic. 

Steps:

1. Tap MAIN RX.
2. If the AFX button shows AFX OFF, tap to turn it ON.
3. Hold the AFX button to switch from DELAY to PITCH.

Headphones and wide CW bandwidths are recommend when you first try this. This 
will give you the full effect. And you'll want a pileup or contest to be going 
on to provide plenty of signals.

Full disclosure: The CW operators in your passband won't know they're part of 
your own private band. And unless it's a traffic net, they won't be working 
together on a single composition. Yet whatever notes they're playing, they 
won't sound like they're all sitting in the same chair.

73,
Wayne
N6KR


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[Dick Dievendorff]

Buzz: Our KAT500 and KPA1500 antenna tuners interrupt the key line with a relay 
for ATU tuning (which is done at exciter power, as we can’t hot switch ATU 
relays at QRO and amps don’t deal well with the SWR swings encountered during 
ATU tune). The K3, like most exciters, does pull down the KEY PTT line just 
before transmitting RF; we just keep that from reaching the amp.  This 
technique works with a lot of exciters, without a need to modify them to emit 
RF without pulling down the KEY line.

Our KPA1500 ATU tune button interrupts the amp key line, (putting the PA in 
standby temporarily) and can be configured to send a message to K3 or K4 to 
start tune level RF.  When ATU tune is complete, the amp sends a message to the 
exciter to cease sending RF, and after RF level drops, the amp restores the key 
line interrupt relay.

73 de Dick, K6KR

> On May 30, 2021, at 07:32, James Beitchman  wrote:
> 
> I think the answer is no, but I'll ask this question anyway. 
> 
> 
> 
> The station configuration is K3 followed by amp followed by automatic
> antenna coupler, where the Key Out line of the K3 is used to switch the amp
> inline.  
> 
> 
> 
> I would like to generate RF from the K3 without switching the amp inline in
> order to operate the automatic antenna coupler at low power from the K3
> before putting the amp inline.  This mean generating RF from the K3 without
> activating the Key Out line. Is there any way to do that using K3 controls?
> 
> 
> 
> 73,
> 
> 
> 
> Buzz
> 
> W3EMD
> 
> 
> 
> 
> 
> 
> 
> -- 
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to d...@elecraft.com 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] KPA500 cabinet buzz

[Richard P McCoy]

-- Forwarded message -
From: Mike Flowers 
Date: Sat, May 29, 2021 at 11:11 PM
Subject: Re: [Elecraft] KPA500 cabinet buzz

Hi Mark,

I’d verify this with Elecraft Support.

  When I got my KPA500 it was used and shipped with the transformer in a
separate box.

The assembly manual was very specific about how to position and tighten the
washer and wing nut holding the transformer in place.  Important to avoid
mechanical buzzing …

Perhaps downloading the KPA500 Assembly manual could provide some guidance.

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

> On May 29, 2021, at 8:39 PM, Richard P McCoy  wrote:
>
> Mark:
>
> I have this same issue with my KPA500,
> connected to my K3S via AuxIO cable.
>
> It's been that way since new from Elecraft.
> It sounds like the AC transformer vibrating against the cabinet?
> It's the same on different bands and power levels.
>
> I've just never had the time to research the problem.
>
> 73, Dick, N4UN
>
>>
>
> After much searching, this 2.4 year old thread is the only info I can
find on
> this issue. I bought a factory built KPA500 a few months ago and mine
buzzes
> on CW key down. Af first I thought maybe this is normal as I never owned
an
> HF amp. Now I think it is a problem.
>
> Any know how to fix this? I can shoot a short movie if that helps.
>
> 73,
> Mark K2QO
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to mike.flow...@gmail.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] KPA500 cabinet buzz

[Mike Maloney]

 The KPA-500 transformer should be more than just a "hair" away from sides 
(step 6 above) as there are rubber bumpers and a ribbon cable between that 
should NOT be pinched.  Refer to Kit Assembly Instructions page 35 and figure 
52.
Mike AC5P
On Sunday, May 30, 2021, 07:29:59 AM CDT, Eric Norris 
 wrote:  
 
 There is KPA500 buzz (normal), and KPA500 BUZZ (abnormal).  I own two.

KPA Numero Uno was bought way back when, when the kits were first
available.  When I first built it, it buzzed something akin to to your
teeth clacking when you notice a full-grown T. Rex is standing next to
you.  At that time, many were complaining about KPA500 buzz, but one must
understand that some would complain that their K3 did not come with the
case stuffed with Krugerands.  A call to Support convinced them it was
really loud.  They sent me an updated bolt, washer, and spacer set.  I very
carefully repositioned the transformer, and torqued the bolt to factory
spec.  Several times.  No buzz then, no buzz now that I can hear.  I do now
have an LP-100A sitting on the top left forward of the cabinet.  A perfect
fit.  Perhaps that is a dampner, who knows.

KPA500 Numero Two-o was bought this year, is factory-built, and has a very
slight audible buzz on cw.  These amps have compact, toroidal, linear
transformers that produce a little buzz.  If it ever rises to an annoying
level, I would:  1)  Turn off the amp using the front-panel switch to drain
the filter caps and let the fan run all the way down.  2)  Turn off the
rear-panel switch.  3) Unlug the amp from A/C.  4.  Remove the top cover as
shown in the manual.  5)  Using a very strong light, see if the transformer
is touching the cabinet.  6)  If so, you can SLIGHTLY.  loosen the bolt
(PAY ATTENTION TO THE TIGHTNESS OF THE BOLT IF YOU DO NOT HAVE A TORQUE
WRENCH), and very, very carefully adjust the transformer so it is a hair
away from the cabinet on all sides.  7)  Reverse the steps.  Repeat if
necessary.  OR  Call Support.  OR wear headphones.  OR Fuggedaboutit.
NOTE:  You can indeed make it worse.  The reason you are probably hearing
it for the first time is that all amps I have owned with linear supplies
also buzz, but the constant fan masks it.


73 Eric WD6DBM

On Sat, May 29, 2021, 5:57 PM k2qo  wrote:

> After much searching, this 2.4 year old thread is the only info I can find
> on
> this issue. I bought a factory built KPA500 a few months ago and mine
> buzzes
> on CW key down. Af first I thought maybe this is normal as I never owned an
> HF amp. Now I think it is a problem.
>
> Any know how to fix this? I can shoot a short movie if that helps.
>
> 73,
> Mark K2QO
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to norrislawfi...@gmail.com
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to a...@sbcglobal.net 
  
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[Ron Manfredi]

Just saw your QRZ page.    It appears that you are operating your 
station remotely, so my simple suggestion obviously won't work.  Hope 
someone else may have the right suggestion for you!



Ron   WA2EIO



On 5/30/2021 10:30 AM, James Beitchman wrote:

I think the answer is no, but I'll ask this question anyway.

  


The station configuration is K3 followed by amp followed by automatic
antenna coupler, where the Key Out line of the K3 is used to switch the amp
inline.

  


I would like to generate RF from the K3 without switching the amp inline in
order to operate the automatic antenna coupler at low power from the K3
before putting the amp inline.  This mean generating RF from the K3 without
activating the Key Out line. Is there any way to do that using K3 controls?

  


73,

  


Buzz

W3EMD

  

  





__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Can the K3 make power without activating Key Out?

[Ron Manfredi]

    If I am understanding correctly, you want to bypass the amp and use 
low power from the K3 into the tuner in order to tune the antenna.


Does the amp have a 'bypass' switch on it?   If not, then you can put a 
switch in the keying line to open it when you want to bypass the amp.


If you are looking for an automatic way of doing this, then obviously 
this isn't it!



Ron   WA2EIO



On 5/30/2021 10:30 AM, James Beitchman wrote:

I think the answer is no, but I'll ask this question anyway.

  


The station configuration is K3 followed by amp followed by automatic
antenna coupler, where the Key Out line of the K3 is used to switch the amp
inline.

  


I would like to generate RF from the K3 without switching the amp inline in
order to operate the automatic antenna coupler at low power from the K3
before putting the amp inline.  This mean generating RF from the K3 without
activating the Key Out line. Is there any way to do that using K3 controls?

  


73,

  


Buzz

W3EMD

  

  





__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] Can the K3 make power without activating Key Out?

[James Beitchman]

I think the answer is no, but I'll ask this question anyway. 

 

The station configuration is K3 followed by amp followed by automatic
antenna coupler, where the Key Out line of the K3 is used to switch the amp
inline.  

 

I would like to generate RF from the K3 without switching the amp inline in
order to operate the automatic antenna coupler at low power from the K3
before putting the amp inline.  This mean generating RF from the K3 without
activating the Key Out line. Is there any way to do that using K3 controls?

 

73,

 

Buzz

W3EMD

 

 



-- 
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

[Elecraft] [KX3] PRE, ATT, MSG, CLR buttons stopped working..

[Geert Jan de Groot]

Hi,

A report on recent events with my KX3:
When I tried to use it yesterday, I found that several buttons
were no longer responding: PRE, ATT, MSG and CLR.

Tried power-off/on, no change. Removed the battaries for 5 minutes, 
no change.

I was able to go to setup and started SW TEST so I could test the 
front panel. Every button and knob was working, except for these four,
which didn't show up with the test.

Looking at the K3 schematics, these buttons all share the same SCAN103 
going to pin27 of U10 on the front panel, the front panel processor. 
Briefly, there is a voltage divider (R81, R80, R90, R89, R96) 
and operating any of the four buttons should switch a different 
voltage to SCAN103. This clearly worked for SCAN100, SCAN101, SCAN102, 
SCAN104 but not for SCAN103. I was worried that the SCAN103 input was zapped.

Looking for people wo encountered this before, I found the blog from OK1RP 
(http://ok1rp.blogspot.com/2019/05/no-response-from-msg-pre-and-attn-keys.html).
On the blog, the solution was to disconnect the flexfoil PCB between
control board and RF board, clean the contacts and re-install.
I checked the connectors - they were seated correctly as predicted in
the blog, I disconnected them, looked for dirty / corroded connectors,
and re-set it, and fortunately the issue was solved.
So, if others encounter this, Petr's blog may help.

But, I still wonder what had happened. The SCAN103 signal is not
connected to said connector and a bad contact cannot affect SCAN103.
SCAN103 only connects said buttons and the CPU, and that is all on
the control panel - no-where near to the interconnect connectors
with the flexfoil.

I wonder if an initialisation issue on the frontpanel processor U10
can have caused this?
Looking closer at the schematic, I see that the SCAN lines are completely
floating if a button isn't pressed. If nu button is pressed, the input
represents a high-impedance floating input. A static field (an operator 
walking to the radi, and, without touching the radio first, opererating
one of the buttons) may perhaps cause an issue setting up the input.
I wonder why these pins don't have 100k to GND or so?

Perhaps the disconnect made power really disappear to do the recovery?
I noticed that my KXBC3 clock was running 20 minutes behind after
the operation - that is the time I worked on the issue, so just removing
the power isn't good enough to really drop all power.

I don't want to badmouth Elecraft, and I don't want to start a war
similar to the "yaesu IF filter discussion" of a few years back,
but I wonder if someone has done a more thorough investigation?
I note that adding resistors is easy (add them at the encoders)
and wonder if this is a change that has been implemented with newer
KX3 builds?

Comments?

73,

Geert Jan PE1HZG

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] KPA500 cabinet buzz

[Eric Norris]

There is KPA500 buzz (normal), and KPA500 BUZZ (abnormal).  I own two.

KPA Numero Uno was bought way back when, when the kits were first
available.  When I first built it, it buzzed something akin to to your
teeth clacking when you notice a full-grown T. Rex is standing next to
you.  At that time, many were complaining about KPA500 buzz, but one must
understand that some would complain that their K3 did not come with the
case stuffed with Krugerands.  A call to Support convinced them it was
really loud.  They sent me an updated bolt, washer, and spacer set.  I very
carefully repositioned the transformer, and torqued the bolt to factory
spec.  Several times.  No buzz then, no buzz now that I can hear.  I do now
have an LP-100A sitting on the top left forward of the cabinet.  A perfect
fit.  Perhaps that is a dampner, who knows.

KPA500 Numero Two-o was bought this year, is factory-built, and has a very
slight audible buzz on cw.  These amps have compact, toroidal, linear
transformers that produce a little buzz.  If it ever rises to an annoying
level, I would:  1)  Turn off the amp using the front-panel switch to drain
the filter caps and let the fan run all the way down.  2)  Turn off the
rear-panel switch.  3) Unlug the amp from A/C.  4.  Remove the top cover as
shown in the manual.  5)  Using a very strong light, see if the transformer
is touching the cabinet.  6)  If so, you can SLIGHTLY.  loosen the bolt
(PAY ATTENTION TO THE TIGHTNESS OF THE BOLT IF YOU DO NOT HAVE A TORQUE
WRENCH), and very, very carefully adjust the transformer so it is a hair
away from the cabinet on all sides.  7)  Reverse the steps.  Repeat if
necessary.  OR  Call Support.  OR wear headphones.  OR Fuggedaboutit.
NOTE:  You can indeed make it worse.  The reason you are probably hearing
it for the first time is that all amps I have owned with linear supplies
also buzz, but the constant fan masks it.


73 Eric WD6DBM

On Sat, May 29, 2021, 5:57 PM k2qo  wrote:

> After much searching, this 2.4 year old thread is the only info I can find
> on
> this issue. I bought a factory built KPA500 a few months ago and mine
> buzzes
> on CW key down. Af first I thought maybe this is normal as I never owned an
> HF amp. Now I think it is a problem.
>
> Any know how to fix this? I can shoot a short movie if that helps.
>
> 73,
> Mark K2QO
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to norrislawfi...@gmail.com
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com