Callsign   4F3XX

Operator Gudo Castillo

Address   97 Paseo del Congreso

              Malolos City 3000zip

              Philippines

Email Address

QSL route QSL direct only 

                or via www.eqsl.cc 

    Note : Sorry route via DU buro is not possible. 

Club membership Communications World of Amateur Philippines, Inc.

                           (CW Philippines) member since 1987

Grid Locator  PK04JU

     Long/Lat  120.7917deg E /14.8541deg N

Country         Philippines

Continent       Oceania

ITU Region    3  

ITU Zone       50       

CQ Zone        27   

IOTA #          OC-042

Other information:

4F3XX  is formerly 4F3GDX & DU3GDX

4F3XX also hold a FCC amateur license KH0HZ

    Got my first license 1988 as DU3GDX (Tech Class)

    upgrade my license 1991 as 4F3GDX (Advance class)

    change my call 1998 as 4F3XX (Advance class)

Station Operating Capabilities & Operating Habits :

     160 meters to 10 meters capable, soon on 6 meters

     I work mostly on RTTY & other digital modes e.g. PSK31

     I work for CW from time to time

     Sometimes work voice too

     Most of the time I swl (a bit of an elephant this end)

     I usual appear on air during contest to give support.