This may or may not be a good idea. The impedance of RF chokes at multiple
frequencies varies greatly, as anyone who has built a high power tube amplifier
that covers 160-10 meters learns, sometimes the hard way. An open wire line
used on several bands may present very high voltages at some
I believe Elecraft radios have an internal bleed but I still put a 470K
1/4 resistor in a PL-259 and use a coax tee on the back of the radio,
antenna on one arm, resistor on the other. I've been wary of chokes,
fearing creating a parasitic machine, but I've never seen that happen.
Precip
My 80M CF Zepp has a feedline with a 2.5 mH RF choke from each side to the
station ground via a 2" wide flashing copper strap.
Never a problem with precipitation build up.
FWIW
73
Ken Kopp - K0PP
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Jack Smith wrote on Thursday, July 31, 2008 at 7:08 PM:
There's also a possible concern with the chokes generating harmonics if
driven into or close to magnetic saturation.
Jack's warning is one good reason why chokes wound on ferrite cores, or
powdered iron cores, for use as 'static
This is probably drifting away from Elecraft specific topics, but a
quick answer to your question is maybe yes or maybe no.
The issue is what happens when one puts large RF voltages across these
lossy ferrite-based chokes. In my application, it isn't an issue but it
certainly can be as was
I've been looking for a pair of RFC's to bleed the static off of my
parallel
feedline to ground. Have a couple of resistors, but would prefer a lower
resistance DC path to ground. The antenna is used for the 160 through 6
meter
ham bands and general coverage receiving so having something
Wife got me the kpa100 for my k2 this Christmas. Started to put it together and
found the rfc 6,7,and 8 seem to be the small size rather than the miniature the
holes are spaced for. Will it hurt to install them in a slightly vertical
orientation or did I get the wrong ones in the kit? I am
I just got the KX1 for Christmas from my XYL and found that L9 was supposed to
be a micro sized 100 uH device. The one I have is a mini size, not micro. The
board layout was for the micro as well. I contacted Elecraft and they told me
that the micro size is no longer available so that is the
There are instructions for handling those chokes on the Elecaft web site at:
http://www.elecraft.com/Apps/Builder_Alert_Installing_Small_Chokes.htm
Ron AC7AC
-Original Message-
Wife got me the kpa100 for my k2 this Christmas. Started to put it together
and found the rfc 6,7,and 8 seem
Kevin,
Look at the Builder's resource page and Application Notes section on the
Elecraft website www.elecraft.com for a diagram of how to handle parts that
are larger than the holes as well as a lot of good information about
soldering and other subjects.
The leads should be formed under the part
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