Elecraft

K3 Standard internal Noise

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Leroy Buller

K3 Standard internal Noise

I am trying to trace down a noise on 40 meters, but it seems to follow the
VFO. On the P3, the noise is a gradual jump that is 6 khz wide. After the
vfo is not used for a while, the noise disappears. Anyone have a
direction to travel? Only on 40 mtrs it seems.

Lee
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Nr4c

Re: K3 Standard internal Noise

I’m all ears. I see it on other bands.

What type of power supply are you using? Switcher? Linear? Brand and model?

Sent from my iPhone
...nr4c. bill

> On Jan 3, 2019, at 8:20 AM, Leroy Buller <[hidden email]> wrote:
>
> I am trying to trace down a noise on 40 meters, but it seems to follow the
> VFO. On the P3, the noise is a gradual jump that is 6 khz wide. After the
> vfo is not used for a while, the noise disappears. Anyone have a
> direction to travel? Only on 40 mtrs it seems.
>
> Lee
> ______________________________________________________________
> Elecraft mailing list
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Brian Hunt

Re: K3 Standard internal Noise

In reply to this post by Leroy Buller

I've seen that. Does putting your hand on top of the P3 change it any? Mine did. Anyway it seems to be related to the BNC cable to the K3. I put a new cable in and jiggled it some and it went away. If it comes back l'll build my own cable with quality connectors and double shielded cable. YMMV

73,
Brian, K0DTJ

> On Jan 3, 2019, at 05:20, Leroy Buller <[hidden email]> wrote:
>
> I am trying to trace down a noise on 40 meters, but it seems to follow the
> VFO. On the P3, the noise is a gradual jump that is 6 khz wide. After the
> vfo is not used for a while, the noise disappears.

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ke9uw

Re: K3 Standard internal Noise

The coax cable supplied with the P3 at some period in time was known to be faulty.

Chuck Jack
KE9UW

Sent from my iPhone, cjack

> On Jan 3, 2019, at 11:38 AM, Brian Hunt <[hidden email]> wrote:
>
> I've seen that. Does putting your hand on top of the P3 change it any? Mine did. Anyway it seems to be related to the BNC cable to the K3. I put a new cable in and jiggled it some and it went away. If it comes back l'll build my own cable with quality connectors and double shielded cable. YMMV
>
> 73,
> Brian, K0DTJ
>
>> On Jan 3, 2019, at 05:20, Leroy Buller <[hidden email]> wrote:
>>
>> I am trying to trace down a noise on 40 meters, but it seems to follow the
>> VFO. On the P3, the noise is a gradual jump that is 6 khz wide. After the
>> vfo is not used for a while, the noise disappears.
>
> ______________________________________________________________
> Elecraft mailing list
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Chuck, KE9UW

donovanf

Re: K3 Standard internal Noise

I own several P3s and all were supplied with cables that are very
susceptible to external RFI because of their very poor quality BNC
connectors. I replaced the cables and my P3s have never had an RFI
problem again. The Elecraft supplied cables went in the trash bin.

73
Frank
W3LPL

----- Original Message -----

From: "charles j jr hawley" <[hidden email]>
To: "Brian Hunt" <[hidden email]>
Cc: [hidden email]
Sent: Thursday, January 3, 2019 5:42:07 PM
Subject: Re: [Elecraft] K3 Standard internal Noise

The coax cable supplied with the P3 at some period in time was known to be faulty.

Chuck Jack
KE9UW

Sent from my iPhone, cjack

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Jim Brown-10

Re: K3 Standard internal Noise

I've had the same issue here.

73, Jim K9YC

On 1/3/2019 9:56 AM, [hidden email] wrote:
> I own several P3s and all were supplied with cables that are very
> susceptible to external RFI because of their very poor quality BNC
> connectors. I replaced the cables and my P3s have never had an RFI
> problem again. The Elecraft supplied cables went in the trash bin.

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Buck

Re: K3 Standard internal Noise

Where did you find "quality" cables?

Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com

On 1/3/2019 2:49 PM, Jim Brown wrote:

> I've had the same issue here.
>
> 73, Jim K9YC
>
> On 1/3/2019 9:56 AM, [hidden email] wrote:
>> I own several P3s and all were supplied with cables that are very
>> susceptible to external RFI because of their very poor quality BNC
>> connectors. I replaced the cables and my P3s have never had an RFI
>> problem again. The Elecraft supplied cables went in the trash bin.
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Rose

Re: K3 Standard internal Noise

Google "Pasternak".... (I think)

On Thu, Jan 3, 2019, 12:58 Buck <[hidden email] wrote:

> Where did you find "quality" cables?
>
> Buck, k4ia
> Honor Roll
> 8BDXCC
> EasyWayHamBooks.com
>
> On 1/3/2019 2:49 PM, Jim Brown wrote:
> > I've had the same issue here.
> >
> > 73, Jim K9YC
> >
> > On 1/3/2019 9:56 AM, [hidden email] wrote:
> >> I own several P3s and all were supplied with cables that are very
> >> susceptible to external RFI because of their very poor quality BNC
> >> connectors. I replaced the cables and my P3s have never had an RFI
> >> problem again. The Elecraft supplied cables went in the trash bin.
> >
> >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
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> > Message delivered to [hidden email]
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Bob McGraw - K4TAX

Re: K3 Standard internal Noise

In reply to this post by Buck

DX Engineering has the following:

https://www.dxengineering.com/parts/dxe-8xdb002

73

Bob, K4TAX

On 1/3/2019 1:53 PM, Buck wrote:
> Where did you find "quality" cables?
>
> Buck, k4ia
> Honor Roll
> 8BDXCC
> EasyWayHamBooks.com
>

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Don Wilhelm

Re: K3 Standard internal Noise

The quality of the coax is usually good, but it is the connectors that
give trouble. If you cut off the connectors and use Amphenol connectors
you will usually have a 'quality' cable.

73,
Don W3FPR

On 1/3/2019 3:22 PM, Bob McGraw K4TAX wrote:

> DX Engineering has the following:
>
> https://www.dxengineering.com/parts/dxe-8xdb002
>
> 73
>
> Bob, K4TAX
>
>
>
> On 1/3/2019 1:53 PM, Buck wrote:
>> Where did you find "quality" cables?

Clay Autery-2

Re: K3 Standard internal Noise

In reply to this post by Rose

Better yet... learn to make your own using Times Microwave materials or
other quality cable stock and connectors.

______________________
Clay Autery, KY5G
(318) 518-1389

On 03-Jan-19 14:01, Rose wrote:

> Google "Pasternak".... (I think)
>
> On Thu, Jan 3, 2019, 12:58 Buck <[hidden email] wrote:
>
>> Where did you find "quality" cables?
>>
>> Buck, k4ia
>> Honor Roll
>> 8BDXCC
>> EasyWayHamBooks.com
>>
>> On 1/3/2019 2:49 PM, Jim Brown wrote:
>>> I've had the same issue here.
>>>
>>> 73, Jim K9YC
>>>
>>> On 1/3/2019 9:56 AM, [hidden email] wrote:
>>>> I own several P3s and all were supplied with cables that are very
>>>> susceptible to external RFI because of their very poor quality BNC
>>>> connectors. I replaced the cables and my P3s have never had an RFI
>>>> problem again. The Elecraft supplied cables went in the trash bin.
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
> ______________________________________________________________
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Bob McGraw - K4TAX

Re: K3 Standard internal Noise

In reply to this post by Don Wilhelm

That's why I say "in most installations, more connectors usually equal
more problems". Mechanical-electro connectors are the weak link in
most all systems.

I've never burned any coax, but I sure have fried a few connectors to
the point of having them flash over internally. With low level signals,
oxidation of contacts restrict or prevent the flow of current. For that
reason, it is good practice to "exercise" connectors to provide wiping
action of the contacts.

And then there are those "look good" connectors found at many hamfests.
Buyer beware, they aren't usually as they appear but simply "good
looking" not necessarily "good performing". Stick with major known brands.

73

Bob, K4TAX

On 1/3/2019 3:01 PM, Don Wilhelm wrote:

> The quality of the coax is usually good, but it is the connectors that
> give trouble. If you cut off the connectors and use Amphenol
> connectors you will usually have a 'quality' cable.
>
> 73,
> Don W3FPR
>
> On 1/3/2019 3:22 PM, Bob McGraw K4TAX wrote:
>> DX Engineering has the following:
>>
>> https://www.dxengineering.com/parts/dxe-8xdb002
>>
>> 73
>>
>> Bob, K4TAX
>>
>>
>>
>> On 1/3/2019 1:53 PM, Buck wrote:
>>> Where did you find "quality" cables?
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
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> Message delivered to [hidden email]
>

Jim Brown-10

Re: K3 Standard internal Noise

While there's a lot of coax around with poor quality shields, cheap
connectors, and poorly installed connectors, cause FAR more problems. My
rules are to NEVER play cheap with connectors and adapters, to ALWAYS
look first at connectors (and adapters), and to build my own cables when
possible. I've always had a strong suspicion that someone at Elecraft
was playing cheap when the vendor for those cables was chosen.

Poor quality coax shields will show up as excessive coupling of shield
current to the inside of the coax, degrading isolation between antennas
and increasing RX noise.

73, Jim K9YC

On 1/3/2019 1:29 PM, Bob McGraw K4TAX wrote:
> That's why I say "in most installations, more connectors usually equal
> more problems". Mechanical-electro connectors are the weak link in
> most all systems.

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Barry LaZar

Re: K3 Standard internal Noise

In reply to this post by Buck

Try The RF Connection. Just tell Joel you want Amphenol connectors. He
will make your cables to order for a reasonable price.

73,
Barry
K3NDM

------ Original Message ------
From: "Buck" <[hidden email]>
To: [hidden email]
Sent: 1/3/2019 2:53:15 PM
Subject: Re: [Elecraft] K3 Standard internal Noise

>Where did you find "quality" cables?
>
>Buck, k4ia
>Honor Roll
>8BDXCC
>EasyWayHamBooks.com
>
>On 1/3/2019 2:49 PM, Jim Brown wrote:
>>I've had the same issue here.
>>
>>73, Jim K9YC
>>
>>On 1/3/2019 9:56 AM, [hidden email] wrote:
>>>I own several P3s and all were supplied with cables that are very
>>>susceptible to external RFI because of their very poor quality BNC
>>>connectors. I replaced the cables and my P3s have never had an RFI
>>>problem again. The Elecraft supplied cables went in the trash bin.
>>
>>
>>______________________________________________________________
>>Elecraft mailing list
>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/mmfaq.htm
>>Post: mailto:[hidden email]
>>
>>This list hosted by: http://www.qsl.net
>>Please help support this email list: http://www.qsl.net/donate.html
>>Message delivered to [hidden email]
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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>Message delivered to [hidden email]

Elecraft mailing list

Re: K3 Standard internal Noise

In reply to this post by Buck

I've had good luck with these people:

http://www.l-com.com/

Have bought coax jumpers, Ethernet and D types from them.

No issues or failures.

73,
Bob
K2TK

On 1/3/2019 2:53 PM, Buck wrote:

Ed Pflueger

Re: K3 Standard internal Noise

In reply to this post by Barry LaZar

R&L makes real good jumpers using Amphenol connecters with 214U.

Ed.. AB4IQ

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Barry
Sent: Thursday, January 3, 2019 7:51 PM
To: Buck <[hidden email]>; [hidden email]
Subject: Re: [Elecraft] K3 Standard internal Noise

Try The RF Connection. Just tell Joel you want Amphenol connectors. He will
make your cables to order for a reasonable price.

73,
Barry
K3NDM

------ Original Message ------
From: "Buck" <[hidden email]>
To: [hidden email]
Sent: 1/3/2019 2:53:15 PM
Subject: Re: [Elecraft] K3 Standard internal Noise

>Where did you find "quality" cables?
>
>Buck, k4ia
>Honor Roll
>8BDXCC
>EasyWayHamBooks.com
>
>On 1/3/2019 2:49 PM, Jim Brown wrote:
>>I've had the same issue here.
>>
>>73, Jim K9YC
>>
>>On 1/3/2019 9:56 AM, [hidden email] wrote:
>>>I own several P3s and all were supplied with cables that are very
>>>susceptible to external RFI because of their very poor quality BNC
>>>connectors. I replaced the cables and my P3s have never had an RFI
>>>problem again. The Elecraft supplied cables went in the trash bin.
>>
>>
>>______________________________________________________________
>>Elecraft mailing list
>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/mmfaq.htm
>>Post: mailto:[hidden email]
>>
>>This list hosted by: http://www.qsl.net Please help support this email
>>list: http://www.qsl.net/donate.html Message delivered to
>>[hidden email]
>______________________________________________________________
>Elecraft mailing list
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>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net Please help support this email
>list: http://www.qsl.net/donate.html Message delivered to
>[hidden email]

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NK7Z

Re: K3 Standard internal Noise

In reply to this post by Bob McGraw - K4TAX

Bottom line... We all spent thousands on our setups, why cheap out on a
connector...

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 1/3/19 1:29 PM, Bob McGraw K4TAX wrote:

> That's why I say "in most installations, more connectors usually equal
> more problems". Mechanical-electro connectors are the weak link in
> most all systems.
>
> I've never burned any coax, but I sure have fried a few connectors to
> the point of having them flash over internally. With low level signals,
> oxidation of contacts restrict or prevent the flow of current. For that
> reason, it is good practice to "exercise" connectors to provide wiping
> action of the contacts.
>
> And then there are those "look good" connectors found at many hamfests.
> Buyer beware, they aren't usually as they appear but simply "good
> looking" not necessarily "good performing". Stick with major known brands.
>
> 73
>
> Bob, K4TAX
>
>
> On 1/3/2019 3:01 PM, Don Wilhelm wrote:
>> The quality of the coax is usually good, but it is the connectors that
>> give trouble. If you cut off the connectors and use Amphenol
>> connectors you will usually have a 'quality' cable.
>>
>> 73,
>> Don W3FPR
>>
>> On 1/3/2019 3:22 PM, Bob McGraw K4TAX wrote:
>>> DX Engineering has the following:
>>>
>>> https://www.dxengineering.com/parts/dxe-8xdb002
>>>
>>> 73
>>>
>>> Bob, K4TAX
>>>
>>>
>>>
>>> On 1/3/2019 1:53 PM, Buck wrote:
>>>> Where did you find "quality" cables?
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

donovanf

Re: K3 Standard internal Noise

There's enormous variance in the quality and reliability of RF
connectors; typically caused by inferior materials, manufacturing
and installation methods. Hams should never try to save a few dollars
on hamfest or cheap import connectors or cables. This is absolutely
one of the worst places to economize in your station.

The BNC connector probably has the widest quality variance of any
RF connector commonly used by hams. Why is this? In part because
the axial alignment and mating force of the male and female connector
bodies is critically important to reliable connector performance. The
spring force of the BNC bayonette and the manufacturing tolerances
of the connector must establish and maintain excellent axial connector
alignment and mating force throughout its life.

Hams experienced in using BNC connectors will often recognize a
poor quality BNC connector when the force required to engage the
bayonette is unusually low and the axial alignment of the connector
bodies is not firmly established and maintained after engaging the
connector. If you can easily manipulate the axial a lignment of a BNC
connector to its mate you probably have an unreliable BNC connector.
This is exactly what was wrong with BNC cable assemblies delivered
by Elecraft with some P3s.

73
Frank
W3LPL

----- Original Message -----

From: "Dave Cole (NK7Z)" <[hidden email]>
To: [hidden email]
Sent: Friday, January 4, 2019 3:42:29 AM
Subject: Re: [Elecraft] K3 Standard internal Noise

Bottom line... We all spent thousands on our setups, why cheap out on a
connector...

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 1/3/19 1:29 PM, Bob McGraw K4TAX wrote:

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W2xj

Re: K3 Standard internal Noise

In reply to this post by Ed Pflueger

I use RG188 double shielded jumpers. The shields are silver plated and connectors are gold plated where possible. I get them from Pasternack.

Sent from my iPad

> On Jan 3, 2019, at 9:22 PM, AB4IQ <[hidden email]> wrote:
>
> R&L makes real good jumpers using Amphenol connecters with 214U.
>
> Ed.. AB4IQ
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Barry
> Sent: Thursday, January 3, 2019 7:51 PM
> To: Buck <[hidden email]>; [hidden email]
> Subject: Re: [Elecraft] K3 Standard internal Noise
>
> Try The RF Connection. Just tell Joel you want Amphenol connectors. He will
> make your cables to order for a reasonable price.
>
> 73,
> Barry
> K3NDM
>
> ------ Original Message ------
> From: "Buck" <[hidden email]>
> To: [hidden email]
> Sent: 1/3/2019 2:53:15 PM
> Subject: Re: [Elecraft] K3 Standard internal Noise
>
>> Where did you find "quality" cables?
>>
>> Buck, k4ia
>> Honor Roll
>> 8BDXCC
>> EasyWayHamBooks.com
>>
>>> On 1/3/2019 2:49 PM, Jim Brown wrote:
>>> I've had the same issue here.
>>>
>>> 73, Jim K9YC
>>>
>>>> On 1/3/2019 9:56 AM, [hidden email] wrote:
>>>> I own several P3s and all were supplied with cables that are very
>>>> susceptible to external RFI because of their very poor quality BNC
>>>> connectors. I replaced the cables and my P3s have never had an RFI
>>>> problem again. The Elecraft supplied cables went in the trash bin.
>>>
>>>
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>
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donovanf

Re: K3 Standard internal Noise

In reply to this post by Buck

Hi Buck,

RF Connection, DX Engineering and Pasternack are excellent sources
for BNC and other high quality high reliability RF cable assemblies.
I'm sure there are many others.

Avoid hamfest and consumer grade cable assemblies, their quality
and reliability varies enormously.

73
Frank
W3LPL

----- Original Message -----

From: "Buck" <[hidden email]>
To: [hidden email]
Sent: Thursday, January 3, 2019 7:53:15 PM
Subject: Re: [Elecraft] K3 Standard internal Noise

Where did you find "quality" cables?

Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com

On 1/3/2019 2:49 PM, Jim Brown wrote: