Mullard made for GE. Vacuum Tube. sections of a single tube. Within 3% I consider to be 'Balanced'. Tested at 92/90. Code = B0T4. Clean tubes will radiate heat better & operate cooler. Test results may differ between various testers for many reasons such as technical design, aging components, etc.
eBay
MILITARY GRADE MULLARD TUBE, CV4024. EQUIVALENT TO, ECC81, 12AT7WA, M1862.
eBay
CV4024 12AT7WA ECC81 M8162 DOUBLE SUTURE. Electronic Tube / Valve. Date Code:8418. Acid Etched Code All parcels with value ofGBP20 and over. Fully Tested. Purchasing from.
eBay
Tubes date codes: R0K2 (2nd week Nov 1960), B3A3 (3rd week Jan 1963). No date code present for the Germany made tube. 3 - 3000+/3000 & 3000+/3000 (Angled Halo Getter - Germany). Minimum good is 1920.
eBay
NOS MULLARD TUBE ECC81 12AT7. Tube in great condition. Tube never used before. Codes factory on glass : TK3 B6C1. Tested on Amplitrex .
eBay
M8162 12AT7WA CV4024. By Mullard. made in Great Britain. one or more item from. FULLY TESTED. Purchasing from.
eBay
1 x 6201 =ECC801s 12AT7 Mullard Valvo tube. Valvo labelled Mullard UK production. Test S / gm .
eBay
CV455 ECC81 12AT7 Valve Tube. Tk1 B6E Code in the Glass.
eBay