[Elecraft] FOR SALE: Elecraft KFL3A-1.0K Filter

[RVZ via Elecraft]

Selling an Elecraft KFL3A-1.0K 1khz filter for K3/K3S in like new condition.  
$100 PayPal Prepaid US. 73, Dick- K9OM (r...@aol.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] Other: Can you run coax inside metal conduit?

[Michael Luberto]

A number of years ago I had a vertical in the woods in my back yard. Between 
the woods and the house was 30 feet of grass. I buried my coax for that stretch 
in PVC under the grass and into the house. Once in the woods the coax was 
exposed. The antenna system worked great until I then built a 60 foot tower. 

KA8IMZ
Michael Luberto

Sent from my iPhone

> On Jun 12, 2024, at 11:46 AM, Jerry Moore  wrote:
> 
> I have 30' run through my basement and want to eliminate potential 
> interaction between the coax and power wires in the same area (don't ask). Is 
> there any problem running coax for HF through metal coax?
> Thanks in advance.
> Yes, I decided to keep my K3S.
> 
> AE4PB
> Jerry Moore
> __
> 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 ka8imzm...@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] Other: Can you run coax inside metal conduit?

[Mark Johnsen]

If possible run the coax perpendicular to the house wiring to keep any
coupling to a minimum.  This was my configuration in the drop ceiling of my
former house. I ran legal-limit with no issue whatsoever.  YMMV of course…

73, Mark NB1U

On Wed, Jun 12, 2024 at 1:28 PM Fred Jensen  wrote:

> OK. Lived for 38 years in a house started in 1925.  Knob-tube wiring.
> You can run coax in metal conduit but NOT with power wiring.  If the
> load on the coax is unbalanced, RF current will likely flow on the outer
> surface of the shield and metal conduit will probably change the SWR.
> [Because of the "skin effect" that confines alternating current to the
> outer surface of conductors, coax really has three "conductors" ...
> center, inner surface of shield, and outer surface].  I'd be surprised
> if you saw any interactions with or without conduit but it would make a
> run of multiple coax cables a lot neater.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> Jerry Moore wrote on 6/12/2024 10:05 AM:
> >
> > HIHI, the house was built in 1960 and the feeds are a huge bundle of
> > wires loosely run across the ceiling of the basement INCLUDING a
> > copper water pipe (cringe). I’m in the process of re-routing the water
> > pipe and looking for a safer way to support the wires. Just a ton of
> > work. My intent with the conduit is to keep HF/UHF/VHF around the coax
> > from getting into the electricals or vice versa.
> >
> > *From:*Fred Jensen 
> > *Sent:* Wednesday, June 12, 2024 12:16 PM
> > *To:* Jerry Moore 
> > *Cc:* Elecraft@mailman.qth.net
> > *Subject:* Re: [Elecraft] Other: Can you run coax inside metal conduit?
> >
> > Yes.  You said "don't ask," but what interactions are you attempting
> > to avoid?
> >
> > 73,
> >
> > Fred ["Skip"] K6DGW
> > Sparks NV DM09dn
> > Washoe County
> >
> > Jerry Moore wrote on 6/12/2024 8:45 AM:
> >
> > I have 30' run through my basement and want to eliminate potential
> interaction between the coax and power wires in the same area (don't ask).
> Is there any problem running coax for HF through metal coax?
> >
> > Thanks in advance.
> >
> > Yes, I decided to keep my K3S.
> >
> > AE4PB
> >
> > Jerry Moore
> >
> > __
> >
> > 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 tok6dg...@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 mark.n...@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] equipment requirements for ALE & KX3?

[bardinet via Elecraft]

Looking into ALE. Using KX3, what equipment is needed? 73 Paul, N7TZW
__
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] Other: Can you run coax inside metal conduit?

[Fred Jensen]

OK. Lived for 38 years in a house started in 1925.  Knob-tube wiring.  
You can run coax in metal conduit but NOT with power wiring.  If the 
load on the coax is unbalanced, RF current will likely flow on the outer 
surface of the shield and metal conduit will probably change the SWR. 
[Because of the "skin effect" that confines alternating current to the 
outer surface of conductors, coax really has three "conductors" ... 
center, inner surface of shield, and outer surface].  I'd be surprised 
if you saw any interactions with or without conduit but it would make a 
run of multiple coax cables a lot neater.


73,

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

Jerry Moore wrote on 6/12/2024 10:05 AM:


HIHI, the house was built in 1960 and the feeds are a huge bundle of 
wires loosely run across the ceiling of the basement INCLUDING a 
copper water pipe (cringe). I’m in the process of re-routing the water 
pipe and looking for a safer way to support the wires. Just a ton of 
work. My intent with the conduit is to keep HF/UHF/VHF around the coax 
from getting into the electricals or vice versa.


*From:*Fred Jensen 
*Sent:* Wednesday, June 12, 2024 12:16 PM
*To:* Jerry Moore 
*Cc:* Elecraft@mailman.qth.net
*Subject:* Re: [Elecraft] Other: Can you run coax inside metal conduit?

Yes.  You said "don't ask," but what interactions are you attempting 
to avoid?


73,

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

Jerry Moore wrote on 6/12/2024 8:45 AM:

I have 30' run through my basement and want to eliminate potential 
interaction between the coax and power wires in the same area (don't ask). Is 
there any problem running coax for HF through metal coax?

Thanks in advance.

Yes, I decided to keep my K3S.

AE4PB

Jerry Moore

__

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 tok6dg...@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] Other: Can you run coax inside metal conduit?

[Jerry Moore]

Meant metal conduit.

From: Jonathan Poland 
Sent: Wednesday, June 12, 2024 12:37 PM
To: Jerry Moore 
Cc: Elecraft Refl 
Subject: Re: [Elecraft] Other: Can you run coax inside metal conduit?

Do you mean metal conduit vs metal coax?? I don't know what you could mean by 
"metal coax". There is no technical problem running through conduit (although I 
don't know if there is a building code restriction).

I used to have a problem where keying my transmitter on 20m rang the front 
doorbell. I don't know what issue you are having, but I'm imagining the garbage 
disposal spurting whenever you transmit 😁.

Jon n0wl

On Wed, Jun 12, 2024, 10:46 AM Jerry Moore 
mailto:je...@carolinaheli.com>> wrote:
I have 30' run through my basement and want to eliminate potential interaction 
between the coax and power wires in the same area (don't ask). Is there any 
problem running coax for HF through metal coax?
Thanks in advance.
Yes, I decided to keep my K3S.

AE4PB
Jerry Moore
__
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 jonpol...@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] Other: Can you run coax inside metal conduit?

[Jerry Moore]

HIHI, the house was built in 1960 and the feeds are a huge bundle of wires 
loosely run across the ceiling of the basement INCLUDING a copper water pipe 
(cringe). I’m in the process of re-routing the water pipe and looking for a 
safer way to support the wires. Just a ton of work. My intent with the conduit 
is to keep HF/UHF/VHF around the coax from getting into the electricals or vice 
versa.

From: Fred Jensen 
Sent: Wednesday, June 12, 2024 12:16 PM
To: Jerry Moore 
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Other: Can you run coax inside metal conduit?

Yes.  You said "don't ask," but what interactions are you attempting to avoid?
73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
Jerry Moore wrote on 6/12/2024 8:45 AM:


I have 30' run through my basement and want to eliminate potential interaction 
between the coax and power wires in the same area (don't ask). Is there any 
problem running coax for HF through metal coax?

Thanks in advance.

Yes, I decided to keep my K3S.



AE4PB

Jerry Moore

__

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 k6dg...@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] Other: Can you run coax inside metal conduit?

[Jim Brown]

On 6/12/2024 8:45 AM, Jerry Moore wrote:

I have 30' run through my basement and want to eliminate potential
interaction between the coax and power wires in the same area (don't
ask). Is there any problem running coax for HF through metal coax?
Thanks in advance.


Easy answer -- under North American Electrical Codes (NEC most places, 
local Codes very similar to NEC in cities like Chicago, Pittsburgh, and 
Los Angeles), it is illegal to run anything that's not power in the same 
conduit with power wiring. These Codes carry the force of Law, and they 
are well-thought out developed by very competent Electrical engineers.


If you want to run the coax in conduit, it must be in conduit with other 
low-voltage wiring.


73, Jim K9YC
__
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] Other: Can you run coax inside metal conduit?

[Jonathan Poland]

Do you mean metal conduit vs metal coax?? I don't know what you could mean
by "metal coax". There is no technical problem running through conduit
(although I don't know if there is a building code restriction).

I used to have a problem where keying my transmitter on 20m rang the front
doorbell. I don't know what issue you are having, but I'm imagining the
garbage disposal spurting whenever you transmit 😁.

Jon n0wl

On Wed, Jun 12, 2024, 10:46 AM Jerry Moore  wrote:

> I have 30' run through my basement and want to eliminate potential
> interaction between the coax and power wires in the same area (don't ask).
> Is there any problem running coax for HF through metal coax?
> Thanks in advance.
> Yes, I decided to keep my K3S.
>
> AE4PB
> Jerry Moore
> __
> 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 jonpol...@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] Other: Can you run coax inside metal conduit?

[l . elecraft]

The short answer is that coax should be fine inside conduit, provided that the 
source and load are actually unbalanced.

All the fields should be inside the coax, between the inner side of the outer 
shield and the inner conductor.

However, if you, for example, connect a coax to a balanced antenna such as a 
dipole without a BALUN, or if the antenna is not tuned to the operating 
frequency, then RF may appear on the outside of the coax.  If there is any, 
then nearby metal like the conduit can screw up the SWR, and in addition, the 
coax can pick up nearby interference.

Of course the above is likely only really true if the coax shield is 100% 
coverage, perhaps with a foil wrap plus copper.

Electrostatic coupling should show up on the outside of the shielf, and not 
find its way to the receiver.  Magnetic coupling will mostly show up as 
currents on the outside of the shield, but in the absense of full coverage, it 
may also excite some currents on the inner conductor.

I run coax through PVC conduit, to a remote antenna tuner mounted outside the 
house.  It seems to work OK.

-Larry K4EO


> On Jun 12, 2024, at 11:45 AM, Jerry Moore  wrote:
> 
> I have 30' run through my basement and want to eliminate potential 
> interaction between the coax and power wires in the same area (don't ask). Is 
> there any problem running coax for HF through metal coax?
> Thanks in advance.
> Yes, I decided to keep my K3S.
> 
> AE4PB
> Jerry Moore
> __
> 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 l.elecr...@stewart.org

__
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] Other: Can you run coax inside metal conduit?

[Fred Jensen]

Yes. You said "don't ask," but what interactions are you attempting to 
avoid?


73,

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

Jerry Moore wrote on 6/12/2024 8:45 AM:

I have 30' run through my basement and want to eliminate potential interaction 
between the coax and power wires in the same area (don't ask). Is there any 
problem running coax for HF through metal coax?
Thanks in advance.
Yes, I decided to keep my K3S.

AE4PB
Jerry Moore
__
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 k6dg...@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] K3 for sale on QTH

[H.R. Freeman]

Hi;

I just acquired a fully optioned K3s and need to sell my back-up/field 
day K3.


I not a hoarder, well not much anyway. Two K3's, and a KX3 are enough.

K3 # 1543 fully updated mods, documented, with options. Clean and ready

Please see details on QTH.com

Thanks

Harry NK9R

Marietta, GA
__
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] Other: Can you run coax inside metal conduit?

[Jerry Moore]

I have 30' run through my basement and want to eliminate potential interaction 
between the coax and power wires in the same area (don't ask). Is there any 
problem running coax for HF through metal coax?
Thanks in advance.
Yes, I decided to keep my K3S.

AE4PB
Jerry Moore
__
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