Description: Quad (4) Strong (NOS+) Raytheon 12AU7A Vacuum Tubes - TV7 Tested TEST RESULTS: NO SHORTS, NO LEAKAGES, NO GAS Tube 1: Side 1: 102 = 2,550 uMhos Transconductance(Gm) at 8.1 mA (Ia =Anode Plate Current) Side 2: 106 = 2,650 uMhos Transconductance(Gm) at 8.8 mA (Ia =Anode Plate Current) Tube 2: Side 1: 99 = 2,475 uMhos Transconductance(Gm) at 8.3 mA (Ia =Anode Plate Current) Side 2: 100 = 2,500 uMhos Transconductance(Gm) at 8.6 mA (Ia =Anode Plate Current) Tube 3: Side 1: 103 = 2,575 uMhos Transconductance(Gm) at 9.2 mA (Ia =Anode Plate Current) Side 2: 101 = 2,525 uMhos Transconductance(Gm) at 8.6 mA (Ia =Anode Plate Current) Tube 4: Side 1: 100 = 2,500 uMhos Transconductance(Gm) at 8.4 mA (Ia =Anode Plate Current) Side 2: 105 = 2,625 uMhos Transconductance(Gm) at 9.5 mA (Ia =Anode Plate Current) For Reference: The Minimum good value for a ECC82/12AU7 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: 45 USD
Location: Rileyville, Virginia
End Time: 2024-08-24T16:42:05.000Z
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: Raytheon
Type: Vacuum Tube
Model: 12AU7A
MPN: ECC82
Country/Region of Manufacture: United States
