What is the signal power for JOAB-DTV?
CREATE TABLE table_2638104_1 (signal_power VARCHAR, callsign VARCHAR)
SELECT signal_power FROM table_2638104_1 WHERE callsign = "JOAB-DTV"
### Context: CREATE TABLE table_2638104_1 (signal_power VARCHAR, callsign VARCHAR) ### Question: What is the signal power for JOAB-DTV? ### Answer: SELECT signal_power FROM table_2638104_1 WHERE callsign = "JOAB-DTV"