25:1 to 81:1 Baluns/Ununs These baluns and ununs can be used for impedance matching and also as End Fed halfwave antenna matching transformers to 50 or 75 ohm coax cable. 50:1250 ohm (25:1) CUBE™ Unun, 100 KHz - 4 MHz, VLF, 1000 Watts PEP 50:1250 ohm (25:1) CUBE™ Unun, 100 KHz - 4 MHz, VLF, 1000 Watts PEP SKU CU-25-1000VLFN $129.95 Buy Now