Antenna Traps W3DZZ 7.1 MHz 100 Watts Kit

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40m Traps for W3DZZ Antenna (priced per pair of traps)

The "W3DZZ antenna" is Charles Buchanan's famous design for a multiband doublet for 80-40-20-15-10m. Perfect for the keen experimenter requiring an effective portable antenna.

Our traps make the construction of your multi-band antenna much easier! Our W3DZZ traps are supplied in kit form, in packs of two (2) traps. SOTABEAMS' traps are small and light, reducing the mechanical and visual problems that can occur with heavier co-ax traps. SOTABEAMS W3DZZ traps have 100 pF 1 kV capacitor in parallel with a 5 uH toroidal inductor. The traps will need weatherproofing before use. We recommend Liquid Electrical tape.


We recommend using a 1:1 balun with all trapped dipole/doublet antennas. Our balun does a great job. The balun stops the feeder becoming part of the antenna system. My experience is that in the case of trapped antennas, feeder coupling makes them harder to adjust.

The following links describe versions of the W3DZZ antenna:

SOTABEAMS traps are the smallest and lightest commercially available traps.

Note: we only provide the traps in kit form. You must assemble the traps and make the antenna yourself.


What's included in a SOTABEAMS Trap kit?

2 x high quality trap PCBs with plated through holes

4 x 100pF 1kv capacitors (used in series or parallel to give 50pF, 100pF and 200pF options)

2 x mounting hardware for toroids

2 x toroids (T94-2)

Enamelled copper wire

Downloadable instructions For this trap:- Use one 100pf Capacitor per trap and 23 turns

Testing Traps - video



Power rating: 100 Watt

Centre frequency: 7.1 MHz

Weight: 28 g = 1 oz

Length: 6.75 cm, 2.75 inches


4 Reviews Hide Reviews Show Reviews

  • 5
    Antenna Traps W3DZZ 7.1 MHz 100 Watts

    Posted by Claus on 14th Sep 2018

    Really a good idea and a great execution! Have the traps for safety's sake packed in bubble gum cups and now a lightweight, powerful multiband portable antenna.

  • 5
    A very good buy

    Posted by MikeG on 23rd Dec 2016

    These traps are robust and ready to roll. Using lightweight wire, Liquid Tape waterproofing, and a Sotabeams 1:1 balun, I had excellent results on 80 and 40 metres from the start, using my FT817.. Well worth the money.

  • 5
    Lightweight and works as designed

    Posted by Per R. Pilkvam on 20th Dec 2015

    Bought a set of the W3DZZ antenna traps. Works as designed. Great product quality. Used Liquid Tape for sealing. SWR is very good without a tuner for 3.7, 7.0 and 21MHz. Very lightweight, so this is one of the antennas to be in the bag for my trips.

  • 5
    Traps, plus lightweight wire and balun make a perfect package

    Posted by Bob Younger on 19th Nov 2015

    These traps, along with the lightweight wire and 1:1 balun, make a perfect. lightweight, but fully capable (up to 100W) portable antenna. Whether a field day event, or just camping, these components provide everything you need in an easy to pack and easy to deploy package.