7) Museu do Rádio, is a good site about Radio Collections.
8) Rádios Antigos Site (Old Radio Site) Antique Radio Sets and History of Radio in Brasil.
9) Officina do Rádio antigo, old radios repair and more!
10) RadiosAntigos, another Brazilian old radio sets site.
12 Ari, a Brazilian Radio Collector, their site.
13) Classics, a series of link about old Radios.
14) The Portal da Radioantiguidade, is a famous Brazilian Portal about Antique radios and History of Radio.
15) I'm one of the authors of these Wikipedia (Portoguese language) about History of Radio: "Radio Waves"; "Hertz"; "Marconi"; "Coherer"; "Ruhmkorff"; "Nikola Tesla"; "Landell de Moura", Tesla Coil "; "Karl Braun"; "Radio Galena"
16) More Pages about old radio devices, Electronics and Radio: Modern radio Labs , RadioMuseum (Germany), The Valve Page, Vintage Radio Company, ScienceMuseum (England), Blog Makezine , 1632 Site, Make a Radio Site.
THE PICTURE IS AN OLD BRAZILIAN TUBE BASED RECEIVER
Image and Copywrigt of Celso Júnior's Blog