Quality 12S3S ( 12C3C ) tubes. triode 12C3C is the equivalent of the LD1 used by the German Luftwaffe in WWII. The 12S3S is e very low noise triode. It’s also very low microphony type. Good audio triode.
Quality 12S3S ( 12C3C ) tubes. triode 12C3C is the equivalent of the LD1 used by the German Luftwaffe in WWII. The 12S3S is e very low noise triode. It’s also very low microphony type. Good audio triode.