King Freeview Spannungseinspeise Adapter for active DVB-T antenna

due to lack of 5V output to the TV for active antenna ordered this product.
Before you buy an active antenna already tested indoor antenna with integrated amplifier (loan). In about 25 km distance from the transmitter without visual contact, the result is negative. Permanent artifacts in ideal weather conditions. Therefore, at 50m of existing Antennenkabelänge had a good DVBT antenna (Kathrein BZD40 DVB-T outdoor antenna active for BIII / UHF range) and provide a 5V power supply to buy. The result is without Spannungseinspeiseadapter not all channels 100%, with adapter to date in all weather conditions on all channels without artifacts. The antenna cable is 20 years old and had been in his day of good quality. Recommended!