Description: Strong Quad (4 tubes) 1960 Magnavox Sylvania 12AU7A Vacuum Tubes NO SHORTS, NO LEAKAGES, NO GAS Tube 1: Side 1: 93 = 2,325 uMhos Transconductance(Gm) at 8.4 mA (Ia =Anode Plate Current) Side 2: 90 = 2,250 uMhos Transconductance(Gm) at 8.0 mA (Ia =Anode Plate Current) Tube 2: Side 1: 92 = 2,300 uMhos Transconductance(Gm) at 8.3 mA (Ia =Anode Plate Current) Side 2: 87 = 2,175 uMhos Transconductance(Gm) at 7.5 mA (Ia =Anode Plate Current) Tube 3: Side 1: 84 = 2,100 uMhos Transconductance(Gm) at 7.4 mA (Ia =Anode Plate Current) Side 2: 81 = 2,025 uMhos Transconductance(Gm) at 7.1 mA (Ia =Anode Plate Current) Tube 4: Side 1: 80 = 2,000 uMhos Transconductance(Gm) at 7.1 mA (Ia =Anode Plate Current) Side 2: 87 = 2,175 uMhos Transconductance(Gm) at 7.7 mA (Ia =Anode Plate Current) Physical Characteristics on both tubes: (See all Pics) - Grey Plates on all - Halo Getter on all- Date Codeon all: 312 022 (1960) For Reference: The Minimum good value for a ECC82/12AU7A tube tested on all TV7 versions is 56/56 = 1,400/1,400 uMhos Gm 'Bogey': Factory Data Sheet NOS when new is 88/88 = 2,200/2,200 (μ℧ ) uMhos Transconductance (Gm) at 10.5/10.5 mA Anode Plate Current Dissipation. Our Test Set: Dan Nelson restored, upgraded and calibrated, TV7A/U with Digital Meter reading Transconductance in uMhos (Gm) and mA (Anode Plate Current). WE PACK VERY WELL FOR SAFE SHIPPING WORLDWIDE. WE SHIP FAST. MANY YEARS EXPERIENCE SHIPPING FRAGILE TUBES AND VINTAGE ELECTRONICS.
Price: 40 USD
Location: Rileyville, Virginia
End Time: 2024-08-23T19:32:08.000Z
Shipping Cost: N/A USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Brand: Magnavox
Type: Vacuum Tube
Model: 12AU7A
MPN: ECC82
Country/Region of Manufacture: United States
