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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Delivery times may vary, especially during peak periods. Contact the seller – opens in a new window or tab cobwebn request a postage method to your location.
Looking for a great antenna and you do not have the space? A 66″ length of 0. When installing each set of wires for the first time — Secure them onto the PVC using velcro cable ties.
At the other end of the assembly right side of the ‘photo connect the coaxes in series: Good bit of kit. Representative APR variable Back in the summer ofI decided that I wanted to build a CobWeb. Skip to main content. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab Add to Watch list.
Instead of using tie wraps to keeps the wires in place we use a UV resistent Zig-Zag Connector allready mounted on the spreaders, just fold the antenna wire between the connectors.
It was a experiment into compact multi-band HF aerials for the higher bands and various solutions existed: Trim the four ends to form short pigtails.
The main part of the CobWeb is the mounting-plate that holds the crossover poles and boom arm. The dimensions shown on the plan below are all in mm.
Learn More – opens in a new window or tab. Select a valid country. Description Postage and payments. Add to basket. Terms and conditions apply. For additional information, see the Global Shipping Programme terms and conditions – opens in cbwebb new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees.
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It’s spam or has links There are copyright or trademark issues It’s offensive or has swear words It includes Feedback about the seller Something else Cancel. Full IP67 with Scotchcast 40 inside the feedbox. Engineering the Doublet Antenna December 31, Your country’s customs office can offer more details, or visit eBay’s page on international trade. Buy it now – Add to Watch list Added to your Watch list. Please allow additional time if international delivery is subject to customs processing.
Mouse over to zoom – Click to enlarge. Top Five Amateur Radio Reviews of The CobWeb offers the following features: The base plate as well as the tube supporting the balun is made from aluminium, the tubes carrying the dipoles are made from glass fibre. Leave a Reply Cancel Reply You must be logged in to post a comment. Estimated delivery dates – opens in a new window or tab include seller’s dispatch time, and will depend on postal service selected. The frequency of the SWR minimum can be tuned by changing the length of the dipoles.
Back to home page. The commercial CobWebb antenna marketed by 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.
A BRAND NEW COBWEB ANTENNA TWIN WIRE CUSTOM BUILT AND 20 METERS | eBay
Delivery times may vary, especially during peak periods and will depend on when your payment clears – opens in a new window or tab. The turn radius is anrenna very compact 6. Happy to announce 0.
Not in stockordered only on customer request, down payment required, delay at c.
The Antenna is in size 2. One common balun feeds five dipoles which are folded in a roughly square shape, only one feedline is required. 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 a mast.
Please enter a number less than or equal to 2. Please note that the wire used was PVC insulated with an outside diameter of 2mm and a conductor diameter of 1mm; cobwbb will vary slightly if you use different wire. April 24, in: