Description: Matched Pair Sylvania JHS-12AT7WA Triple Mica Tubes. Test at NOS TEST RESULTS: NO SHORTS, NO LEAKAGES, NO GAS Tube 1: Side 1: 91 = 4550 uMhos Transconductance(Gm) at 10.5 mA (Ia =Anode Plate Current) Side 2: 93 = 4650 uMhos Transconductance(Gm) at 10.9 mA (Ia =Anode Plate Current) Tube 2: Side 1: 91 = 4550 uMhos Transconductance(Gm) at 11.9 mA (Ia =Anode Plate Current) Side 2: 93 = 4650 uMhos Transconductance(Gm) at 12.0 mA (Ia =Anode Plate Current) Physical Characteristics: (See all Pics) - Triple Mica - Sylvania 12AT7WA Made in USA - Double Bar Getter, copper rods For Reference: The Minimum good value for a 12AT7 tube tested on all TV7 versions is 50/50 = 2,500/2,500 uMhos Gm 'Bogey': Factory Data Sheet NOS when new is 80/80 = 4,000/4,000 (μ℧ ) uMhos Transconductance (Gm) at 3.7/3.7 mA Anode Plate Current Dissipation(+/- 10%) when tested at 100V. NOS is 110/110 = 5,500/5,500 (μ℧ ) uMhos Transconductance (Gm) at 10/10 mA Anode Plate Current Dissipation(+/- 10%) when tested at 250V. 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: 40 USD
Location: Rileyville, Virginia
End Time: 2024-09-04T15:12:54.000Z
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: SYLVANIA
Type: Vacuum Tube
Model: 12AT7
MPN: 12AT7WA
Country/Region of Manufacture: United States
