Description: Matched Pair of Bell and Howell 12AU7 / ECC82 Vacuum Tubes - Seamed Tops- Halo Getters - Labelled Made in India- Labelled Bell and Howell Schools - Date Code: TEST RESULTS: NO SHORTS, NO LEAKAGES, NO GAS Tube 1: Side 1: 94 = 2,350 uMhos Transconductance(Gm) at 9.0 mA (Ia =Anode Plate Current) Side 2: 92 = 2,300 uMhos Transconductance(Gm) at 8.6 mA (Ia =Anode Plate Current) Tube 2: Side 1: 89 = 2,225 uMhos Transconductance(Gm) at 8.3 mA (Ia =Anode Plate Current) Side 2: 91 = 2,275 uMhos Transconductance(Gm) at 8.8 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 at 250v. All TV7's test at 150V. 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: 48 USD
Location: Rileyville, Virginia
End Time: 2024-09-12T20:22:25.000Z
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: Bell
Type: Preamp Tubes
Model: ECC82
MPN: 12AU7
Country/Region of Manufacture: India
