The DX Engineering Maxi-Core™ Special Line Transformers are designed to be used in the construction of an
ultra-low loss,
low cost, long length feedline system for 50-ohm HF antennas.
The model DXE-BAL450-H10-B-P consists of a pair of special high power 450-ohm balanced to 50-ohm unbalanced line transformers which may be used at each end of any length of 450-ohm ladder line. This allows a cost-effective, low-loss, very long feedline to be created, to connect a 50-ohm HF transmitter or transceiver to a distant matched 50-ohm HF antenna system.
The loss of 450-ohm ladder line is typically 1/10 of the loss of RG-213. Depending upon feedline length and frequency of operation, power transfer and signal reception can be improved by 2 to 5 dB using DXE-BAL450-H10-B-P Special Line Transformers and
DXE-LL450-5C or
DXE-LL450-1K 450-ohm ladder line that represents an
improvement of one and a half to over three times in signal level performance - both transmitting and receiving. 
Special Line Transformer Kit Instructions (251K pdf)
All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. DX Engineering's sole obligation under these warranties shall be to issue credit, repair, or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustments or repairs, or any other work, unless such charges are authorized in advance by DX Engineering.
If DX Engineering's products are claimed to be defective in material or workmanship, DX Engineering shall, upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportation-charges prepaid by Buyer). Every such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writing.
The above warranties shall not extend to any products or parts thereof which have been subjected to any misuse or neglect, damaged by accident, rendered defective by reason of improper installation, damaged from severe weather including floods, or abnormal enviromental conditions such as prolonged exposure to corrosives or power surges, or by the performance of repairs or alterations outside of our plant, and shall not apply to any goods or parts thereof furnished by Buyer or acquired from others at Buyer's specifications. In addition, DX Engineering's warranties do not extend to other equipment and parts manufactured by others except to the extent of the original manufacturer's warranty to DX Engineering. The obligations under the foregoing warranties are limited to the precise terms thereof. These warranties provide exclusive remedies, expressly in lieu of all other remedies including claims for special or consequential damages.
SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NO PERSON IS AUTHORIZED TO ASSUME FOR DX ENGINEERING ANY OBLIGATION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH THE FOREGOING.
; "Transformer For Low Loss Feedline Runs Set of 2")
