[4] A Fulbright Scholarship for study in Rome was rescinded by the House Committee on Un-American Activities because Trogan had signed a petition supporting the prominent socialist, Norman Thomas.
[citation needed] While a graduate student Trogan produced chamber works for vocal and instrumental ensembles: the Sextet for Wind Quintet and Piano, Elegy for String Quartet and Contralto, and incidental music for Berthold Brecht's The Good Woman of Szechuan.
In New York he organized public concerts, lectures and seminars featuring prominent individuals and ensembles including the composers Henry Cowell and Wallingford Riegger, the Grand Prix du Disque-winning Kohon String Quartet, the violinist Max Polikoff and the violist Walter Trampler.
[citation needed] Premieres of his piano music were presented by Paul Jacobs and Metropolitan Opera conductor Richard Woitach, and his Sonata for Unaccompanied Violin was performed by Harold Kohon at The Town Hall.
In 1997, Trogan's second compositional period began with the creation of much piano music, his Chamber Symphony, and Más ficciones (por Jorge Luis Borges) for unaccompanied violin.