What kind of problems above 800?
No, the claim is true. What you are overlooking in his post is the lobe/directivity of the antenna as the frequencies increase above 500 MHz. Most transmissions are terrestrial, so an antenna that has a receive directivity toward the horizon is preferred. He then notes he uses a different discone that is sized/tuned to perform better at the higher frequencies and brings both signals into his receiver using a diplexer, and plenty of filters, etc. etc. Prcguy posted a thread about that setup.So the 3000N marketing up to 3000 Mhz recieve is BS?