Multiband NO TRAP NO GAP Antenna. This Antenna is a small wonder, easy to build and allow you to work all HF spectrum with your TRX and it's internal ATU. It consist of a matching device at it's feed point to enable lowering the impedance of a randow wire. Winding 14-18 turns of twin insulated wire 1.75mm over an AMIDON T-200-2 RED Toroid type and wiring as the image on your right will enable you to perfectly feed the radiating element . Once finished, place it in a waterproof plastic casing used for electrical wiring suitable for UV radiations. Complete it utilizing a SO 239 socket and two Stainless Steel Bolt to ensure long life under external condition. Connect, to the Wire Terminal, a lenght of wire ranging from 7,6m onwards depending the frequency range we would like to obtain. With 7,6m we can easily cover from 7Mhz upwards, for better performance we suggest to leghten the wire up to 8,6 > 12m so to have a better performance staring from 3.5 Mhz. The Antenna will perform well in vertical position utilizing a retractable fiberglass pole ( we use a 9m fiberglass fishing rod ) so to deploy the Antenna in seconds just hook the wire to the top part and extend the elements fully. You are now ready to operate ALL BAND NO GAP making use also of the internal ATU of your TRX for portion of band where SWR is above 2:1. See Below the Antenna fully extended and in Action during a short Portable Expedition.
This antenna shows a very low Radiating Angle mounted on the ground too outperforming poorly installed Trapped Vertical and Tribanders where proper height cannot be achieved. A Must for all portable operations in HF, Castles activation, IOTA, SOTA, Emergency and Civil protection practices. We have a stock of them to be used in Africa in our Radio net project, sturdy construction and durable, no manteinanance no bends no repairs, can resist a thyphoon, just change the wire if you wish and have a new antenna ready for use in many occasion. These are the Antennas we will be using in our operation in Africa and daily used by many short Dx activation. Total weight less than 2.5 Kg.