Costas got his ham license as SV1XV in 1985 and also held callsign G7AHN between 1987 and 1994. His main amateur radio projects in the past were TCP/IP packet radio (AMPRnet) and APRS.

Nowdays he is mostly active in RTTY on HF, plus 50 MHz SSB and CW. Costas is also intrerested in the Low Frequency bands, below 500 kHz (although he cannot erect the proper antennas).

QSL cards for SV1XV can be sent either Direct (address above) or via the QSL bureau.

Costas is a member of RSGB, BARTG and LWCA (Longwave Club of America). Since December 2002, Costas is the QSL card Checkpoint for SV, SV5 & SV9 for the Italian Castles Award (D.C.I.)

(updated 25 August 2006)