119 12AV7 twin triode 12AV7 NOS USA JAN Philips ECG 1980s B9A A$8.80 20 gram http://www.retrovox.com.au/Images/12AV7janphilips5_1.jpg 12AV7 is a medium-mu twin triode for use as a RF amplifier or a a combined oscillator and mixr in VHF TV receivers. It may also be used as an audio frequency ampifier