Buddipole

[KARL MARDERIAN]

  Hi, N6xvt/Karl here,
I have a Buddipole. I set it up correctly for 20 m. When I tuned up my K3 I got about 1.1/1.2 SWR. I would imagine it tunes at about 5-10 watts. If I transmit at 1-10 watts it seems to run fine. At 100 watts the K3 shuts itself of at the second CQ I send. I am on SSB. If I hook up a dummy load to the K3 it runs fine at any power setting. I live in an apartment on the second floor. The Buddipole is outside on the balcony. I am running the cable that came with the Buddiploe. I have tried both ANT one and two.

                           Thanks for any info.
                              73 N6xvt
______________________________________________________________
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

[Steve Ellington]

Try forming about 10 ft. of your coax into a balun.....loops about 6" in
diameter and using some tape to hold it together. That might keep enough RF
off the rig to keep it going. If this helps, consider buying a "line
isolator" from Radio Works.
73
Steve
N4LQ
----- Original Message -----
From: "KARL MARDERIAN" <[hidden email]>
To: "Elecraft Reflector" <[hidden email]>
Sent: Saturday, February 13, 2010 5:08 AM
Subject: [Elecraft] Buddipole

>  Hi, N6xvt/Karl here,
> I have a Buddipole. I set it up correctly for 20 m. When I tuned up my K3
> I got about 1.1/1.2 SWR. I would imagine it tunes at about 5-10 watts. If
> I transmit at 1-10 watts it seems to run fine. At 100 watts the K3 shuts
> itself of at the second CQ I send. I am on SSB. If I hook up a dummy load
> to the K3 it runs fine at any power setting. I live in an apartment on the
> second floor. The Buddipole is outside on the balcony. I am running the
> cable that came with the Buddiploe. I have tried both ANT one and two.
>
>                           Thanks for any info.
>                              73 N6xvt
> ______________________________________________________________
> 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

--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.733 / Virus Database: 271.1.1/2684 - Release Date: 02/12/10
14:35:00

______________________________________________________________
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

[Leigh L. Klotz Jr WA5ZNU]

The Buddipole includes a short bead balun, but it's a bit weenie.  I suspect it's designed to allow the coax to be a radial at the lower frequencies, but I'd have thought it would do better at 20 meters.  (I've not had this problem by the way.)  Wrapping 8 turns through a big #31 or #77 toroidal core a few feet away from the rig will still let it be part of the ground system but will keep the RF away from the rig.

You might also consider the Buddipole RRSB balun, which offers step-down impedance settings.  (Elecraft sells fine baluns for 1:1 and step-up, but they don't have a step-down balun.) Electrically short antennas have lower than 50 ohm impedance at resonance, so impedance matching at the antenna to get closer to 50R is helpful, even if you make the antenna resonant (X=0).  Such a balun then serve two purposes, and would be especially useful for the lower bands, when using a vertical and a couple of elevated radials for your ground.

Leigh/WA5ZNU