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Mullard 12AU7 A / ECC82 Tightly Matched Tube Pair - Gray Plate, " O " Getter 1963




Item History & Price

Information:
Reference Number: Avaluer:17748566Brand: Mullard
Country/Region of Manufacture: GermanyModel: 12AU7
MPN: ECC82Type: Preamp Tubes
Original Description:
12AU7A / ECC82 Mullard matched tube pair
short (14mm), ribbed, gray plates. "O" / halo getters. 
Tube 1 date code: "Gf1-Ɛ3C1" - March 1963, Great Britain (Marconi, Chelmsford)
Tube 2 date code: "Gf1-?3D5" - April 1963, Great Britain
tubes are presumed used as they are not with original boxes
tubes test strong and are VERY tightly matched and balanced

Hickok 539C Test Results
Shorts: PASS
Leakage: PASS
Noise: PASS
Gas: PASS
Life: PASS
Mutual... conductance (minimum good Gm = 1950 micromhos)
Tube 1 Triode 1 = 2500
Tube 1 Triode 2 = 2500
Tube 2 Triode 1 = 2500
Tube 2 Triode 2 = 2450
Plate Current (Idc @ mA)
Tube 1 Triode 1 = 7.91
Tube 1 Triode 2 = 8.36
Tube 2 Triode 1 = 7.78
Tube 2 Triode 2 = 7.72
Additional testing and information at customer request. 

Shipping Information
All items ship same day or next with USPS first class shipping.  International orders will ship via EBAY Global Shipping Program.  Additional shipping options at customer request. If your country is not available, please contact me and I will modify shipping. 
#0053 #0055

Thanks for looking!



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