9:1 High power balun 1000 watts 1 to 30MHz View Gallery Product Details 9:1 High power balun 1000 watts 1 to 30MHz 91BALUN1K130 Product Condition: New Units in Stock: 10 £39.80 inc. tax Product Description Extreme wideband by design full HF (1.8 to 30 MHz) So239 socket to single binding post for a long wire. Internal mounted so239 socket for maximum power transfer. PTFE Teflon heat resistant wire wingdings 100 % silver plated. (Very expensive aircraft quality) Wound on a premium quality core wrapped in PTFE glass tape. Perfect match up to 30 MHz 99.95% Efficiency For even higher quality matching go to Ntype Sockets for only +£4 extra (please note on order). Set up with our Rigol DSA 850 spectrum analyser fitted with tracking generator function for maximum performance and minimum losses.Good for Power levels of around 850 to 1000 watts pep with so239 if higher power required then you will need to go to K type see other listingsWhy have anything less than the best performance? This is by far the best on eBay and the price is more than reasonable.If you were to buy these parts and build your own you would be spending much more.. we buy in bulk and this is why we can do it at this price.Warning never use any 9:1 ulun with wire lengths less than half wave length for the band of operation poor performance and extreme voltages generated 14,500v @1 00w is not uncommon. On very short antenna lengths always use the formula 467 / frequency = half-wave antenna length in feet.