Hello guys,
I'm planning on purchasing a K3/100 but am concerned about my second floor
shack and RF problems.
First of all:
1) I don't have an RF ground (don't really want to drill thru the house and
siding for the ground strap) and
2) my antenna is a semi-indoor/attic dipole (HOA).
I'm runni
Hi Chuck
I have no experience with artificial grounds, but I can tell you that
a balun will quite likely put an end to your RF burn problem.
Regarding RF ground, most hams don't have one. It's rarely needed (I'm
talking about rig RF ground, not, say for antennas, which is a whole
other thin
Chuck,
RF-in-the-shack is always antenna related and not transceiver related.
Unless the transceiver is having some kind of strong parasitic
oscillation, and that would show up in other ways as well.
You may not notice the RF at low power levels, but when you get up to
the 30 watt and above l
I operated inside a condo on the beach for several years with a 44 foot
wire center fed
with ladder line antenna, fed with a Johnson matchbox, I had some RF
on some bands, so I
strung a wire around the edge of the room on the floor cut for the band
that had the
worst RF. Connected it to the g
7; Cooke
K5EWJ
From: callen1155
To: elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 4:18:50 PM
Subject: [Elecraft] K3/100 -Second floor- no RF ground ??
Hello guys,
I'm planning on purchasing a K3/100 but am concerned about my second floor
s
On Wed, 24 Feb 2010 14:18:50 -0800 (PST), callen1155 wrote:
>I'm planning on purchasing a K3/100 but am concerned about my second floor
>shack and RF problems.
The most important thing to understand is that a connection to EARTH has
NOTHING
to do with RFI, or RF feedback, or any of the problems
On Wed, 2010-02-24 at 18:16 -0800, Jim Brown wrote:
> On Wed, 24 Feb 2010 14:18:50 -0800 (PST), callen1155 wrote:
>
> >I'm planning on purchasing a K3/100 but am concerned about my second floor
> >shack and RF problems.
>
> The most important thing to understand is that a connection to EARTH has
IMHO, the real problem is the location of the r.f. and not the ground. My
shack is also on the second floor and I NEVER have problems with r.f. in the
shack, even with high power.
I've also done attic and gutter/eaves antennas, and they've ALWAYS managed
to couple into house AC and telephon
Thanks for that Alan,
I have been saying the same thing for years. Earth grounds are for AC
safety and Lightning safety. They have nothing to do with RF Ground
reference. Yes, RF "Ground" is nothing but a reference point for the RF
voltage (or current).
For our purposes, think of it only as
make ones antenna from solid
conductors? Yes...a weird question but it's been bugging me.
Steve
N4LQ
- Original Message -
From: "Don Wilhelm"
To:
Cc:
Sent: Wednesday, February 24, 2010 11:11 PM
Subject: Re: [Elecraft] K3/100 -Second floor- no RF ground ??
> Thanks fo
Steve,
That is a bit of a strange question - because I never though of my
antenna wires as being a conductor for lightning. While the antenna
wires will pick up lightning surges, I don't think that is what is being
considered. What they are talking about is how to dissipate whatever
lightnin
Chuck, I have an almost identical setup to what you are proposing. It's
really difficult to get an effective RF ground on an upper story because the
ground connection has resonance which may result in a high impedance at
higher frequencies. Some people have suggested an MFJ Artificial Ground but
t
g stranded wire for antennas improves ligtning protection.
Steve
N4LQ
- Original Message -
From: "Don Wilhelm"
To: "Steve Ellington"
Cc: ; ;
Sent: Thursday, February 25, 2010 12:13 AM
Subject: Re: [Elecraft] K3/100 -Second floor- no RF ground ??
> Steve,
>
&
sing stranded wire for antennas improves ligtning protection.
>
> Steve
> N4LQ
> - Original Message -
> From: "Don Wilhelm"
> To: "Steve Ellington"
> Cc: ; ;
> Sent: Thursday, February 25, 2010 12:13 AM
> Subject: Re: [Elecraft] K3/100 -Sec
A most interesting statement. Here in the upper midwest where we
have plenty of summer lightning, it was quite common to install
lightning rods on barns and houses. The wire they used for grounding
the rods was loosely braided copper about 3/4 inch in diameter. Go
figure.
David Christ
At
llen1155'" ;
Sent: Thursday, February 25, 2010 12:58 PM
Subject: Re: [Elecraft] K3/100 -Second floor- no RF ground ??
> Chuck,
>
> I operate a K3/100 from a 2nd story shack and have significant RF ground
> problems. I do have a good powerline ground, but that is irrelevant
-
From: callen1155 [mailto:callen1...@yahoo.com]
Sent: Wednesday, February 24, 2010 2:19 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3/100 -Second floor- no RF ground ??
Hello guys,
I'm planning on purchasing a K3/100 but am concerned about my second floor
shack and RF problems.
Fir
teve Ellington"
Cc:
Subject: Re: [Elecraft] K3/100 -Second floor- no RF ground ??
Steve,
Just don't "bet your life on it" - the difference between stranded and
solid wire will be minuscule for a lightning surge.
On Thu, 25 Feb 2010 09:58:47 -0800, Jerry T. Dowell wrote:
>bands 160M through 6M, with varying degrees of effectiveness. I cannot run
>my amplifier (Alpha 78) at more than 200-300 watts on most bands without
>significant RF problems, including tripping GFIs. I intend to try to
>alleviate the prob
rom: Steve Ellington [mailto:n...@carolina.rr.com]
Sent: Thursday, February 25, 2010 11:46 AM
To: Jerry T. Dowell; 'callen1155'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3/100 -Second floor- no RF ground ??
As for ESDSomeone here suggested going barefooted. I've verified thi
Thanks guys for all the advice and comments.
Great information.
You've given me some ideas and options to try toward eliminating the RF.
73.
chuck
af4xk
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Sent from the [K3] mailing l
I have never seen it in residential carpeting but some places where I
have worked had carpets with a fine wire woven in with the other
fibers. It was to prevent static electricity. You can also get
little straps that go on the shoes to drain static electricty.
David K0LUM
At 2:46 PM -0500 2/
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