pg_dump trunc some rows

Hi all,
I have a DB with encoding SQL_ASCII and in some field I have strange
character:

# \encoding
SQL_ASCII
# select city, id_country from user_data where id_user = 4146;
city | id_country
---------------------------+------------
Serra de Outes - A Coruña | 61
(1 row)

now if I do a dump the line relative to this row is truncated and
after the field city field id_country is not dumped!!!

Any Idea?

Gaetano
Mendola