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Mullard 12AX7 / ECC83 Matched Tube Pair, Gray Plates, " O " Getter, Blackburn 1956




Item History & Price

Information:
Reference Number: Avaluer:17820980Model: 12AX7
MPN: ECC83Country/Region of Manufacture: United States
Brand: MullardType: Preamp Tubes
Original Description:
Mullard 12AX7 / ECC83 matched tube pair
short, ribbed, gray plates.  single top halo/"O" getters
matching etch codes: 163 B6H1
Manufactured in Mullard factory, Blackburn Great Britain, August 1956
re-labelled RCA for US import and distribution by RCA
 Tubes test NOS/very strong, and tightly balanced and matched

Hickok 539C Test Results
Shorts: PASS
Leakage: PASS
Noise: PASS
Gas: PASS
Life: PASS
Mutual conductance (minimum good Gm = 875 ...micromhos)
Tube 1 Triode 1 = 1400Tube 1 Triode 2 = 1450Tube 2 Triode 1 = 1450Tube 2 Triode 2 = 1400
Plate Current (Idc @mA)
Tube 1 Triode 1 = 0.77Tube 1 Triode 2 = 0.82Tube 2 Triode 1 = 0.84Tube 2 Triode 2 = 0.91
Additional testing and information at customer request. 

Shipping Information
All items ship same day or next with USPS first class shipping.   Additional shipping options at customer request. If your country is not available, please contact me and I will modify shipping. 

 #0103,   #0104
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