91 UNUN 1kW 1.8-54MHz for Long Wire Antennas Ham Radio
With over three decades of hands-on experience, we design, engineer, and build every antenna at our dedicated factory in the heart of Birmingham. At Sigma, we don't just make antennas - we craft reliable communication tools built to perform, built to last. You're investing in British-made quality, decades of expertise, and the kind of personal service only a family business can deliver. 9:1 UNUN 1kW 1.8-54MHz for Long Wire Antennas Ham Radio. Over 30 Years Experience - est 1990. Please note an ATU will be needed between the antenna and whatever amplifier you are using. This is a listing for the Sigma Euro-Comm 9:1 UNUN 1kW This provides a feedpoint for a long wire radiating element and converts the impedance from 450? (+/-) to something nearer to the 50? There are three connections on the UNUN, a SO239 to which you connect the coaxial feed line and two machine screws with butterfly wing nuts. To one of these you should connect the longest piece of wire you have available and to the other you should connect a length of wire to earth. The best way to do this is to attach a length of wire to a ground rod and fix it to the UNUN at this terminal which is marked with a green label so you are able to identify it correctly. Fix the feedpoint up as high as you possibly can - it may be attached to a pole or to a wall and then attach the other end of the wire to a point as far away as is possible. This is best done if the wire can be kept in a straight line and horizontal but, if this is not possible due to space restrictions, do not despair. The wire may be dog-legged, sloped or fixed in any number of ways to enable it to fit in the space available. The other end of your coaxial cable should be attached to your ATU and then from the ATU to your transceiver. Power up, make final adjustments to tune and away you go. Please use a good quality 50 Ohm coax, RG-213 or Mini 8 are probably the best choice.
If you are using a high-power amplifier it is essential that an external ATU is used between the antenna and the amplifier, otherwise damage may occur. EU Customers: We are a UK-based company.
From July 1st 2021, the EU introduced new VAT rules for the import of goods from outside the EU. Please also note that if your antenna is over 150 Euros you will also face a small courier administration charge. Please note that when purchasing items from the UK there will be import charges on the item. Full address details can be added here too. Australian Caravans & RV's.Business name: Sigma Euro-Comm Ltd Member since: 19 Nov, 2010 Based In United Kingdom. Please note an ATU will be needed between the antenna and whatever amplifier you are usingThis is a listing for the Sigma Euro-Comm 9:1 UNUN 1kW This provides a feedpoint for a long wire radiating element and converts the impedance from 450? (+/-) to something nearer to the 50?
The best way to do this is to attach a.