1619 Single Ended Tube Amplifier | The Vintage Audio Life

The 1619 has a 2.5 volt, 2 amp directly heated cathode and is a metal octal beam power pentode with outward appearance and ratings similar to the metal 6L6. According to the RCA datasheet in A1 with 300 volts anode, 250 volts G2, it can make 3 watts RMS into an 8K load at 7% THD with 10 volts drive. This is almost 2A3 territory! This tube can also be run into A2 territory or AB2 in P-P where a pair will make a respectable 36 watts at just 2.5% THD.