[Elecraft] K4 and K3 - Sherwood Report

[RVZ via Elecraft]

I agree with Igor, since neither the K4 and K4D have roofing filters their 
performance probably won't equal that of a K3S with a narrow roofing filter in 
some contest environments. Therefore, I'm hoping to keep my K3S in operation 
long-term.  I realize this is a long shot, but after Elecraft recovers from 
Covid and Forest Fires, I'd like to see them go back to manufacturing the K3S 
as the radio fills a need: outstanding for contesting and serious portable 
operation such as DXpeditions and Field. I for one don't need or want a Display 
built into my radio, if I want a Display I use a 24" monitor.  I'm NOT saying 
the K4 won't fill a need, I'm saying the K3S meets a need, as does the K2, and 
I'd like to see the K3S continue to be manufactured.       73, Dick- K9OMIn 
a message dated 6/1/2021 7:24:06 PM Central Standard Time, 
elecraft-requ...@mailman.qth.net writes: 
Message: 12Date: Tue, 1 Jun 2021 19:32:59 +0500From: Igor Sokolov 
To: elecr...@mailman.qth.netSubject: [Elecraft] Rob Sherwood 
on K4Message-ID: <158e8935-8547-9d7f-3df0-694060297...@gmail.com>Content-Type: 
text/plain; charset=utf-8; format=flowed I see that Rob Sherwood put K4 figures 
into his table Receiver Test Data (sherweng.com) 
. BDR figures probably preclude use of K4 
in Multy cathegory contest environment and? we need K4HD for that purpose which 
would hopefully have 140-150 DB of BDR. Is their more detailed report available 
from Elecraft or from Sherwood? I am especially interested in such a TX 
parameters as wide band TX noise, but other things would also be useful to 
know. Until K4HD is available my old trusty K3 will still be used for 
contesting and my KX3 S.N. 051 - for SOTA and traveling. 73, Igor UA9CDC 
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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Jim Brown]

On 6/1/2021 8:02 PM, Paul GACEK via Elecraft wrote:

I had very little noticeable interference from one kx3 to the other.


It's the proximity of ANTENNAS that matters, NOT the radios. Here are 
slides for a talk I gave a couple of years ago at Visalia on all the 
issues that arise with multi-transmitter operation.

http://k9yc.com/Multi-Station.pdf

73, Jim K9YC


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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Igor Sokolov]

Drew, KX3 is not the best radio for multi-multi environment. The radio 
automatically protects itself by switching preamp off if 59+20 signal 
appears on the band. With even stronger adjacent signal the radio 
engages attenuation. Blocking dynamic range of the radio is not for 
multi-multi. You would be much better off with several K3. They are 
probably still the best choice for this kind of operation both TX and RX 
wise.


73, Igor UA9CDC

02.06.2021 7:23, Drew Arnett пишет:

Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
Day?  How does the RX hold up with loud signals on other bands?  Plan
to run external band pass filters of course.  The KX-3 is so great at
everything else.  And it's great for single op HF contesting.  Just
wondering if it will fold in a strong signal environment.

Thanks and best regards,

Drew
n7da
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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Paul GACEK via Elecraft]

Drew

I suspect the issue is not so much with the KX3 assuming smart deployment and 
separation but rather with the brand of your other station’s rigs.

As you already know, I was possibly with one of them and my biggest issue 
(using a K3s) was the CW “thumping” I heard.

When I built and ran my portable kx3 S02r station which ran both occasionally 
through a trixplexer, filters and into a HexBeam, I had very little noticeable 
interference from one kx3 to the other.

Paul

> On Jun 1, 2021, at 7:29 PM, Drew Arnett  wrote:
> 
> Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
> Day?  How does the RX hold up with loud signals on other bands?  Plan
> to run external band pass filters of course.  The KX-3 is so great at
> everything else.  And it's great for single op HF contesting.  Just
> wondering if it will fold in a strong signal environment.
> 
> Thanks and best regards,
> 
> Drew
> n7da
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Re: [Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Walter Underwood]

Here are some KX3 tips from Wayne back in 2012.

http://elecraft.365791.n2.nabble.com/Field-Day-Operating-Tips-including-some-KX3-specific-td7557858.html
 


And to save you some typing, it is “KX3”, no need for a hyphen.

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

> On Jun 1, 2021, at 7:23 PM, Drew Arnett  wrote:
> 
> Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
> Day?  How does the RX hold up with loud signals on other bands?  Plan
> to run external band pass filters of course.  The KX-3 is so great at
> everything else.  And it's great for single op HF contesting.  Just
> wondering if it will fold in a strong signal environment.
> 
> Thanks and best regards,
> 
> Drew
> n7da
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[Elecraft] KX-3/KXPA100 for multi-multi contesting?

[Drew Arnett]

Anyone try a KX-3/KXPA100 for multi-multi HF contesting like Field
Day?  How does the RX hold up with loud signals on other bands?  Plan
to run external band pass filters of course.  The KX-3 is so great at
everything else.  And it's great for single op HF contesting.  Just
wondering if it will fold in a strong signal environment.

Thanks and best regards,

Drew
n7da
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Re: [Elecraft] K2 rotary encoder

[Josh Gibbs]

Quick update on my K2. The new TPIC6B595N turned up on my doorstep this
afternoon and my K2 is now 100% operational once again.

Thanks again for your help Don.

73,

-Josh WU7H


Your investigation is "spot on" and I would normally recommend replacing
>> Front Panel U3.  It is possible for it to have one bad input and is
>> quite static sensitive.
>>
>>
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Re: [Elecraft] KIO3

[lashap]

I could use a KIO3 also.
Tnx
Larry k6ro

www.LSRarecoins.com
www.k6ro.com
310-710-2869

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of n3ua
Sent: Tuesday, June 01, 2021 3:48 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KIO3

I need a KIO3 board to repair a K3. If anybody upgraded K3 to the K3S
should have an extra. Please make me an offer for your used KIO3. 

Thanks

73

Sejo , N3UA

n...@msn.com



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[Elecraft] KIO3

[n3ua]

I need a KIO3 board to repair a K3. If anybody upgraded K3 to the K3S  should
have an extra. Please make me an offer for your used KIO3. 

Thanks

73

Sejo , N3UA

n...@msn.com



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Re: [Elecraft] 2 meter PA

[Jim Brown]

On 6/1/2021 11:16 AM, Josh Fiden wrote:

I had great success with an RF Concepts brick for quite a few years.


Yes. This was one of the brands I was talking about.

73, Jim K9YC
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Re: [Elecraft] 2 meter PA

[Jim Brown]

On 6/1/2021 10:38 AM, Hank via Elecraft wrote:

I use 2 seperate ones for my KX3: Mirage B-34-G for portable/SOTA ops (3 watts 
in gets me almost 40 watts out) and a Mirage B-320-G for station use (3 watts 
in yields about 210 watts out).


Same advice here, but especially look for one of these "brick amps" 
PRE-MFJ, when they were built on the west coast by two or more different 
companies. W6GJB and I were looking several years ago, and a post on the 
NCCC reflector brought four offers. They're essentially 150W amps, but 
models with different drive levels, from 2 to 30W.


73, Jim K9YC
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[Elecraft] using secondary HDMI screen ....

[Bill Steffey NY9H]

Will this work ??

using a waveshare 7" touchscreen screen for a rasberry pi .. also my 
RFKIT LDMOS amp.


does it seem doable to use the touch feature on this 60$ screen hooking 
the Waveshare's USBmini (touch ) to a USB on the k4



As I plot my station for the arrival of a K4 !!!

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Re: [Elecraft] KPA500 cabinet buzz

[Mark Adams]

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Re: [Elecraft] 2 meter PA

[Josh Fiden]

I had great success with an RF Concepts brick for quite a few years. Not made 
anymore but are for sale frequently. Receive preamp worked well too. I had the 
RFC2-417 which is supposed to be 170w out for 40w in, but got quite a lot of 
power driven by an HT. They have a few configs like RFC2-23 which is 2w in 30w 
out. 

Definitely recommended. 

73
Josh W6XU

Sent from my iPad

> On Jun 1, 2021, at 8:33 AM, David Herring  wrote:
> 
> Can anyone recommend a good 2 meter PA for use with a KX3?  
> 
> I’m not looking to spend a king’s ransom, but I am leery of blindly buying an 
> “unknown off-shore branded” unit. 
> 
> Being paired with a KX3 it would need to be portable (or at least luggable) 
> and powered by 12 VDC.  30, 40, 50 watts or so would I think be quite 
> fine…just more than the 2 - 3 watts the KX3’s internal 2 meter module puts 
> out.
> 
> Ideas, suggestions, recommendations welcomed...
> 
> 73,
> David - N5DCH
> 
> 
> 
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Re: [Elecraft] 2 meter PA

[Hank via Elecraft]

I use 2 seperate ones for my KX3: Mirage B-34-G for portable/SOTA ops (3 watts 
in gets me almost 40 watts out) and a Mirage B-320-G for station use (3 watts 
in yields about 210 watts out).

I bought them both used on QRZ.com from hams with good seller ratings there.  I 
have been very pleased with their performance - especially the 34-G.  It has 
been in my backpack and seen quite a few bumps riding in the Jeep on forest 
service roads.

Hank
K4HYJ


- Original Message -
From: Ray (wa6...@gmail.com)
Date: 06/01/21 13:10
To: Eric Garner (garn...@gmail.com), David Herring (david.n5...@gmail.com)
Cc: Elecraft (elecraft@mailman.qth.net)
Subject: Re: [Elecraft] 2 meter PA

Mirage and KLM have VHF Amplifiers for SSB.
You can find Used ones at Swaps or QTH.com
73  WA6VAB   Ray

From: Eric Garner
Sent: Tuesday, June 1, 2021 9:22 AM
To: David Herring
Cc: Elecraft
Subject: Re: [Elecraft] 2 meter PA

RM Italy makes amps that would fit the bill. DX Engineering carries them

Eric KI7LTT

On Tue, Jun 1, 2021 at 8:33 AM David Herring  wrote:

> Can anyone recommend a good 2 meter PA for use with a KX3?
>
> I’m not looking to spend a king’s ransom, but I am leery of blindly buying
> an “unknown off-shore branded” unit.
>
> Being paired with a KX3 it would need to be portable (or at least
> luggable) and powered by 12 VDC.  30, 40, 50 watts or so would I think be
> quite fine…just more than the 2 - 3 watts the KX3’s internal 2 meter module
> puts out.
>
> Ideas, suggestions, recommendations welcomed...
>
> 73,
> David - N5DCH
>
>
>
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Re: [Elecraft] 2 meter PA

[Ray]

Mirage and KLM have VHF Amplifiers for SSB.
You can find Used ones at Swaps or QTH.com 
73  WA6VAB   Ray

From: Eric Garner
Sent: Tuesday, June 1, 2021 9:22 AM
To: David Herring
Cc: Elecraft
Subject: Re: [Elecraft] 2 meter PA

RM Italy makes amps that would fit the bill. DX Engineering carries them

Eric KI7LTT

On Tue, Jun 1, 2021 at 8:33 AM David Herring  wrote:

> Can anyone recommend a good 2 meter PA for use with a KX3?
>
> I’m not looking to spend a king’s ransom, but I am leery of blindly buying
> an “unknown off-shore branded” unit.
>
> Being paired with a KX3 it would need to be portable (or at least
> luggable) and powered by 12 VDC.  30, 40, 50 watts or so would I think be
> quite fine…just more than the 2 - 3 watts the KX3’s internal 2 meter module
> puts out.
>
> Ideas, suggestions, recommendations welcomed...
>
> 73,
> David - N5DCH
>
>
>
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Re: [Elecraft] 2 meter PA

[Eric Garner]

RM Italy makes amps that would fit the bill. DX Engineering carries them

Eric KI7LTT

On Tue, Jun 1, 2021 at 8:33 AM David Herring  wrote:

> Can anyone recommend a good 2 meter PA for use with a KX3?
>
> I’m not looking to spend a king’s ransom, but I am leery of blindly buying
> an “unknown off-shore branded” unit.
>
> Being paired with a KX3 it would need to be portable (or at least
> luggable) and powered by 12 VDC.  30, 40, 50 watts or so would I think be
> quite fine…just more than the 2 - 3 watts the KX3’s internal 2 meter module
> puts out.
>
> Ideas, suggestions, recommendations welcomed...
>
> 73,
> David - N5DCH
>
>
>
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[Elecraft] 2 meter PA

[David Herring]

Can anyone recommend a good 2 meter PA for use with a KX3?  

I’m not looking to spend a king’s ransom, but I am leery of blindly buying an 
“unknown off-shore branded” unit. 

Being paired with a KX3 it would need to be portable (or at least luggable) and 
powered by 12 VDC.  30, 40, 50 watts or so would I think be quite fine…just 
more than the 2 - 3 watts the KX3’s internal 2 meter module puts out.

Ideas, suggestions, recommendations welcomed...

73,
David - N5DCH



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[Elecraft] WTB KXPA100

[David Herring]

Anyone have a KXPA100 in good working order excess to their needs?  Please 
contact me directly, off list.

73,
David - N5DCH



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[Elecraft] Rob Sherwood on K4

[Igor Sokolov]

I see that Rob Sherwood put K4 figures into his table Receiver Test Data 
(sherweng.com) .


BDR figures probably preclude use of K4 in Multy cathegory contest 
environment and  we need K4HD for that purpose which would hopefully 
have 140-150 DB of BDR. Is their more detailed report available from 
Elecraft or from Sherwood? I am especially interested in such a TX 
parameters as wide band TX noise, but other things would also be useful 
to know.


Until K4HD is available my old trusty K3 will still be used for 
contesting and my KX3 S.N. 051 - for SOTA and traveling.


73, Igor UA9CDC

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Re: [Elecraft] KIO3B upgrade

[Wes]

You no longer have knobs, but the computer sound card controls and the digital 
app of your choice give you control of levels.  Use VOX in the radio and you 
won't know the difference, except for having a better sound card.


Wes  N7WS


On 6/1/2021 4:38 AM, Jim Leder wrote:

I have an older K3 and have been using a USB Signalink for digital. The audio 
levels are easy to control with the TX and RX pots on the Signalink. With the 
KIO3B installed, putting the soundcard inside the K3, how are those levels 
controlled? I ordered the upgrade kit, but need to know about this before 
finishing it up.
The Signalink has been easy to control and very reliable. Will the KIO3B 
upgrade be as easy to operate?

Jim Leder … K8CXM

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[Elecraft] KIO3B upgrade

[Jim Leder]

I have an older K3 and have been using a USB Signalink for digital. The audio 
levels are easy to control with the TX and RX pots on the Signalink. With the 
KIO3B installed, putting the soundcard inside the K3, how are those levels 
controlled? I ordered the upgrade kit, but need to know about this before 
finishing it up.
The Signalink has been easy to control and very reliable. Will the KIO3B 
upgrade be as easy to operate?

Jim Leder … K8CXM

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