Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_23394920_1 ( power_kw VARCHAR, callsign VARCHAR )

### Question ###
When dxrt-tv is the callsign what is the power kw?

### Accurate SQL ###

SELECT power_kw FROM table_23394920_1 WHERE callsign = "DXRT-TV"