Perhaps KX3 is overloading from BC stations nearby as you OCF may capture
stronger signals than your previous antenna. Noise from overloading goes
away with lower preamp gain.
Ignacy, NO9E
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K9YC raises an important issue. I love my OCF dipole, but only because
I was very careful in how it went up.
My friend in Germany is making a serious study of common mode noise on
OCF dipoles, and from his work I know you must bring the transmission
line away at a 90 degree angle, and use a
On 5/1/2014 11:14 PM, K8JHR wrote:
My friend in Germany is making a serious study of common mode noise on
OCF dipoles, and from his work I know you must bring the transmission
line away at a 90 degree angle
It's MUCH more than that. OCF (off-center-fed) antennas (dipole implies
balance) are
Hello Niel,
Not sure if this is appropriate for this group, but I'll post a response
and see. If not, we can take off line... Your response seems right in
step with where I would be. You might consider your first step as
running your radio on batteries, and killing power to your home. If you
@mailman.qth.net
Subject: Re: [Elecraft] KX3 Chasing local HF noise sources
Message-ID: 53632790.4080...@w0mu.com
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Run the KX3 on battery and turn off your house mains and see if the
noise goes away. If not you know to start looking
It appears to me that no-radial verticals are also OCF dipoles,
vertically oriented. In my new QTH I will be limited to a vertical, and
I chose a Cushcraft (well, MFJ now) R8. It has a built-in 'balun' --
that is, a choke -- but I am taking no chances and have prepared another
choke that I
On 5/2/2014 10:12 AM, Vic Rosenthal K2VCO wrote:
It appears to me that no-radial verticals are also OCF dipoles,
vertically oriented. In my new QTH I will be limited to a vertical, and
I chose a Cushcraft (well, MFJ now) R8. It has a built-in 'balun' --
that is, a choke -- but I am taking no
On 5/2/2014 11:45 AM, Phil Kane wrote:
Honolulu Emergency Amateur Radio Club (I have no
financial interest in the club or the product other than satisfaction).
It's tuned by the KAT/100 and rated for 40m and down, but it will also
tune to 60m. 80/75m is something else, same as the
Isn't this more of a Zepp than an OCF?
On 5/2/2014 11:55 AM, Phil Kane wrote:
On 5/2/2014 11:45 AM, Phil Kane wrote:
Honolulu Emergency Amateur Radio Club (I have no
financial interest in the club or the product other than satisfaction).
It's tuned by the KAT/100 and rated for 40m
Good Evening All,
Questions and Advice sought, i will report back on results...
(cross posted to qrp-l, elecraft, and kx3)
I live in a rural area, which should be very low noise. i put up a OCFD
(88:44) this afternoon, and tonite wandered on to 80m to listen and check the
antenna. I
Run the KX3 on battery and turn off your house mains and see if the
noise goes away. If not you know to start looking elsewhere. You might
also try the RFI reflector.
Mike W0MU
On 5/1/2014 10:47 PM, Niel Skousen wrote:
Good Evening All,
Questions and Advice sought, i will report back on
On 5/1/2014 9:47 PM, Niel Skousen wrote:
Other suggestions / recommendations
Hi Niel,
First, dump the off-center-fed dipole -- it's inherently noisy. Put up
some resonant dipoles (or even fan dipoles) and put a ferrite common
mode choke at the feedpoint of each dipole. Study
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