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_name_50 (frequency VARCHAR, power__kw_ VARCHAR, call_sign VARCHAR)

### Question ###
What's the frequency of the call sign DYFR with 10KW of power?

### Accurate SQL ###

SELECT frequency FROM table_name_50 WHERE power__kw_ = "10kw" AND call_sign = "dyfr"