By data from 300 Ohm , you mean without using the 300 to 75 Ohm Balun? If yes , then Would you care to explain why are you comparing Apples to Oranges?. Apples being other antennas using the Balun (which as any other device always introduces insertion losses) and oranges being YOUR antenna with no Balun attached. As you probably know most antennas are designed for 300 Ohms at the Dipole.

Please if the answer was yes , Would you care to mention the insertion losses of the Balun on the other antennas so we can compare Apples to Apples?.

Unlike you I am a Telecommunication Engineer and therefore I always base my technical opinions on technical data rather than personal taste or profit margin. Maybe that is why I am so poor or maybe rich depending on someone's dictionary.

Insertion losses should not be that high either for a balun so the DBGH should still be a very good antenna, performance wise.

Thanks for posting the info, BTW. Good to know you guys are improving it a bit more.