Its been a while since I posted a new article, a delay at least partly due to me herniating a disc in my neck which left me completely unable to look downwards for. Micrometals is committed to supplying high quality, low cost soft magnetic core material to meet the needs of the electronics industry. If you turn over almost any electronic device, you should find all those compliance logos CE, FCC, UL, TV, and friends. They mean that the device meets required. Jenny List Hackaday. If you turn over almost any electronic device, you should find all those compliance logos CE, FCC, UL, TV, and friends. They mean that the device meets required standards set by a particular region or testing organisation, and is safe for you, the consumer. Among those standards are those concerning EMC, or Electro. Magnetic Compatibility. These ensure that the device neither emits RF radiation such that it might interfere with anything in its surroundings, nor is it unusually susceptible to radiation from those surroundings. Achieving a pass in those tests is something of a black art, and its one that Pero has detailed his exposure to in the process of seeing a large 3 phase power supply through them. A0N.jpg' alt='Ferrite Core Inductor Software Downloads' title='Ferrite Core Inductor Software Downloads' />Its a lengthy, and fascinating post. He takes us through a basic though slightly redacted look at the device itself, before describing the testing process, and the EMC lab. These are fascinating places with expert staff who can really help, though they are extremely expensive to book time in. Since the test involves a mains power supply he describes the Line Impedance Stabilisation Network, or LISN, whose job is to safely filter away the RF component on the mains cable, and present a uniform impedance to the device. In the end his device failed its test, and he was only able to achieve a pass with a bit of that black magic involving the RF compliance engineers secret weapons copper tape and ferrite rings. Pero and his colleagues are going to have to redesign their shielding. Weve covered our visits to the EMC test lab here before. Four band portable dipole antenna system for 2. At a glance Bands 2. Weight 5. 85 g, 2. Power rating 1. 25 Watts. ATU needed No. Connects direct to your radio. Balun included Yes. Induction heating uses the heat produced by currents induced within a conducting body exposed to the alternating magnetic field produced by AC current flowing in an. Ferrite and toroid links. My own AL calculation software Interface switchable between NL and the UK language. SSB, CW, data Yes. Fine for all modes. How long is this antenna About 4. IMPORTANT NOTE if you are using a Band Hopper with our 1. Compact Travel Mast, attach the antenna with a cable tie to the top of section 1. This is about 2. 0ft up and is the perfect height for the antenna centre. Any higher and the antenna may not work properly and your Compact Travel Mast could be damaged. What do you get Band Hoppers are a complete system including A resonant multi band dipole antenna with Perspex link hardware. A 1. 0m feeder high quality RG1. BNC plug. Built in balun. HTB1ETR7KXXXXXbZXFXXq6xXFXXXD/2-5-8mm-Ferrite-core-inductor-100uh.jpg' alt='Ferrite Core Inductor Software Downloads' title='Ferrite Core Inductor Software Downloads' />A guying system for a lightweight telescopic pole 6 8 metres length recommendedThree Wire Winders to ensure tangle free operating. Three lightweight aluminium alloy pegs. A detailed set of instructions. A nylon carry bag with attachment clip. Our famous back up for any questions that you have. Band Hoppers work out of the packet no messing, just fun Is this the right antenna for YOUClick here for help. Details. Designed to compliment modern miniature HF transceivers such as the Youkits HB1. B or the Elecraft KX1, the Band Hopper IV covers 2. MHz 1. 5 1 VSWR bandwidth using our Hopper Jump system  in one neat package. Using all our innovative techniques and laser cut hardware, the Band Hopper IV works straight out of the packet on all your favourite portable band. Full sized dipoles on each band means no compromise performance. Not sure what a linked dipole is Click here. The Band Hopper IV covers four HF bands with a high efficiency full size halfwave dipole on each band. Its not a compromise loaded antenna. Its also designed to allow you to get the feedpoint high thats important for good performance. Bureau 13 Stalking The Night Fantastic Pdf Download. Band selection is by easy to use jumpers quick to change Using the Band Hopper IV could not be easier. The custom designed centrepiece fits on an tapered pole such as our famous SOTA pole. It slides down to the optimum height usually the junction between the top and second sections of the mast. If you dont have a tapering mast dont worry, the centrepiece has slots for cable ties too so you can attach it to most anything. Dont like masts The centrepiece has an attachment point for a throwing line to use in the forest. Unrolling the dipole elements is a breeze using the Wirewinders supplied. When you unroll the elements you will notice that the Wirewinders are attached to 4m 1. This not only means that you cannot lose them but also that in rocky areas you can guy your pole by putting the Wirewinder in a crack in the rocks or just by putting it under a rock. The Wirewinders also make great snow anchors too so guying your pole in the snow has never been easier We also provide pegging loops for use with our high quality pegs included. The feeder is a 1. RG1. 74 preterminated in a BNC plug. This is wound on a third Wirewinder. Also on the third Winder is a 1. No need for any additional guys and the two dipole elements plus the back guy are all you need for a stable and robust system. The back guy is attached to the Wirewinder to give you the flexible guying options above. Just a mast or use a nearby terr to support the centre of your antenna and youre good to go This Band Hopper IV is super light tooThe whole package consisting of the antenna, the Wirewinders and the back guy weighs in at less than 4. No need to adjust the Band Hopper IV, it is supplied pre tuned. We do the tricky stuff leaving you to have the fun. This is a fully assembled product that works out of the packet. Each Band Hopper IV is supplied in a stylish carry bag complete with lightweight aluminium pegs. The Band Hopper IV is a truly amazing package for a bargain price.