CREATE TABLE table_17643 ("Branding" TEXT, "Callsign" TEXT, "Ch. #" TEXT, "Power  ( kW ) " TEXT, "Station Type" TEXT, "Coverage  ( Transmitter site ) " TEXT)

What is the power when ch# is tv-26 and dyfj-tv?
SELECT "Power (kW)" FROM table_17643 WHERE "Ch. #" = 'TV-26' AND "Callsign" = 'DYFJ-TV'
SELECT "Power (kW)" FROM "table_17643" WHERE "Callsign" = 'DYFJ-TV' AND "Ch. #" = 'TV-26'