Siemens ECC81 / 12AT7 – 1967 Valvo Label – Small O Halo, Matched Sections

Listing details

1967 Siemens Valvo ECC81 / 12AT7 – Small O Halo Getter – Matched Sections

• Model: ECC81 / 12AT7

• Manufacturer: Siemens, Germany

• Branding: Valvo label, Siemens internal construction

• Year of Manufacture: 1967 (Code: ‡7H)

• Getter Type: Small O Halo

• Construction: Gray plates, halo getter, glass-etched VF4, factory code BMV+dg 468

• Condition: Testing Good

• Tube Type: Dual triode with matched sections – balanced performance

📊 Test Results (Triplett 3444):

Gm (Transconductance): 4,100 / 4,100

mA (Current): 7.6 / 7.6

Minimum Good: 3,500 Gm

Average New: 5,400 Gm

Noise/Microphonics: Quiet – no shorts, gas, or leakage

🎛️ Applications:

Perfect phase inverter or driver tube for:

Fender Super Reverb – V6 position

Ensemble Evocco Integrated Amp (1998)

Fender '65 Twin Reverb and other 12AT7-based circuits

📦 Ships fast, insured, and well-packed from a trusted seller – VTubeAudio.

Inv. 7-1 77341715