COBWEBB ANTENNA PDF

COBWEB,HF,1/2W,8-BD,6,10,12,15,17,20,30,40M,KW . MFJ Cobweb Antenna turns your space problem into a stack of QSL cards from far away places . Ideal HF Antenna. Efficient. Transmitter power gets converted to RF, not to heating the ground, coax, or matching network components. G3TPW CobWebb Antenna for the 14, 18, 21, 24 and 28 MHz Bands All the other small multi-band commercial antennas that are available are less than.

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CobWeb Aerial | M∅PZT

wntenna Alpha Antenna M Multiband Military 2. The CobWeb offers the following features: Engineering the Doublet Antenna December 31, Instead of using tie wraps to keeps the wires in place we use a UV cobwehb Zig-Zag Connector allready mounted on the spreaders, just fold the antenna wire between the connectors. Have one to sell? Your country’s customs office can offer more details, or visit eBay’s page on international trade. Mouse over to zoom – Click to enlarge.

CobWeb Aerial

Leave a Reply Cancel Reply You must be logged in to post a comment. Learn More – opens in a new window or tab Any international postage is paid in part to Pitney Bowes Inc.

The turn radius is a very compact 6. Good bit of kit. Contact the seller – antenma in a new window or tab and request a postage method to your location. Why is this review inappropriate?

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Add to basket. For additional information, see antdnna Global Shipping Programme terms and conditions – opens in a new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees.

One common balun feeds five dipoles which are folded in a roughly square shape, only one feedline is required.

Dimensions Cowbebb following details my own build and what worked for me — Each piece of PVC sticks out cm past the ali-tube, with mm inside the ali and held in place via a through-bolt. This item will be sent through the Global Shipping Programme and includes international tracking.

End 2 is the one you connect to the SO socket. The commercial CobWebb antenna marketed covwebb Steve Webb G3TPW – and most of the home-made derivitives – overcome this problem by using folded-dipoles constructed from Figure-8 twin lead as the elements. Skip to main content. Add to Watch list Watching. The mounting arrangement consists of 2 plates — The 1st holding the main crossover poles 1 on top, 1 underneath and the boom, the 2nd supporting the boom and fixing to antenha mast.

The spreaders which must be non-conductive for this prototype were made up of 20mm PVC conduit.

High Quality 5 bander CobWeb Antenna

The cobweb antenna meets the requirement nicely – it comprises 5 parallel dipoles bent into a square shape and mounted on a support structure made of fibreglass poles. The following photos show the general idea: The rod supporting the balun box is a 42″ length of 0.

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Cohwebb a valid country. For a long-term solution, fibreglass tubing is advised. Due to the square arrangement of the dipoles the overall size is very small, just by cm.

High Quality 5 bander CobWeb Antenna

This is a backwards incompatible release which is the primary reason for it being You will need 2x mm lengths of RG or RG for w max which can be linked via a series of short lengths of heat-shrink tubing. A complete balun solution is also available: Cobwrbb in cable insulation can mean that the dimensions which work for one constructor may not work for another. A 66″ length of 0.

This makes mine cm square. See all mcr has no other items for sale. The wires are coated with a UV resistent coat. Find out more about your rights as a buyer – opens in a new window or tab and exceptions – opens in a new window or tab.

The overall diameter fits nicely inside the aluminium poles with a few turns of PVC tape either side of the fixing hole.