Radio Technique 12AT7, round halo getter – France

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Radio Technique 12AT7, round halo getter - FranceLoading...

Since I have recently bought some very nice EL34/6CA7 integrated amplifier (serbian manufacturer P&K Audio, model Duet 34, triode mode connection only), I started playing with its one and only input pre-amplifier tube that is of ECC81 type. Other two phase inverter/driver tubes are the reference Tungsols 5687 which I luckily did not have to play with 🙂

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