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JJ 12AT7 ECC81 Preamp Tube - AmpTubes for all your tube needs
i read an article that 7025, 12ax7, 12at7, and 12au7 tubes are interchangable. i had no idea! | The Gear Page
Genalex Gold Lion 12AT7 Preamp Tube - StewMac
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Preamp tube or double triode driver 12AT7 ECC81 ECC801S
The '12AT7′ Tube - Effectrode
