CREATE TABLE table_204_270 (id NUMBER, "transmitter" CLOB, "kw" NUMBER, "bbca" NUMBER, "bbcb" NUMBER, "d3&4" NUMBER, "sdn" NUMBER, "arqa" NUMBER, "arqb" NUMBER, "pol." CLOB, "a.g." CLOB)

which is the next bbca with the number 26 and its transmitter
SELECT "transmitter" FROM table_204_270 WHERE "bbca" = 26 ORDER BY id LIMIT 1
SELECT "transmitter" FROM "table_204_270" WHERE "bbca" = 26 ORDER BY "id" FETCH FIRST 1 ROWS ONLY