Push pull amplifier – tube troubleshooting

Below are procedures that customer needs to complete to identify faulty tube, before submitting a warranty request:

  1. For Push Pull tube amps – 2 power tubes (either EL34 or KT88 – these are the most commonly used power tubes in push pull amps are used per channel. You may also see 2*300B or 2*845 type power tubes in recent years’ design)  Total 4 tubes are used for two channels together.