text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_74 (det_pre_amp VARCHAR, _number_tubes VARCHAR)
  ### Question:
  Name the det/pre-amp with # of tubes of 8
  ### Answer:
  SELECT det_pre_amp FROM table_name_74 WHERE _number_tubes = "8"