This has all sorts of nasty effects, think of: interference, EMI, RFI disrupted radiation pattern of the antenna, restless noise level. The most important reason to use a good BalUn is to ensure that the coax cable does not become part of the antenna system and therefore radiates as well. The 1:2 BalUn 600 Watts is suitable for QRO use. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer. The transceiver has an impedance of 50 Ohm, so an impedance transformation must also be made. The characteristic impedance of a delta loop or quad-loop antenna is about 100 Ohm. This allows us to adapt an unbalanced system (coax cable) to a balanced antenna system (delta loop or quad-loop antenna).
If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step.
Manual 1:2 BalUn 600 Watts for Delta-loop & Quad-loop antennas
