NOS? PHILIPS

12AU7WA - E82CC - ECC82 - 12AU7

Price is for 1 what seems to be NOS tube. One "O" shape round getter and gray plates.  Visible etched codes of the Heerlen plant Holland - 𝛥1G5

Tested VERY GOOD as follow:

Ia1 = 9.9 mA | S1 = 1.9 mA/V | Ri1 = 8.5 kOhm | μ1 = 16.2
Ia2 = 8.6 mA | S2 = 1.7 mA/V | Ri2 = 9.2 kOhm | μ2 = 15.6

Tested under: Uf = 12.6V | Ua = 250V | Ug1 = -8.5V
Good starts at Ia=7.0mA and 100% is Ia=10.5mA

HIGH-QUALITY & QUITE RARE AUDIO PREAMP TUBE!

Shipping will be Airmail registered with tracing number. Other shipping methods available on request.