NOS ECC83 (12AX7) Tungsram vacuum tubes

We have NOS ECC83 (12AX7) Tungsram vacuum tubes.

NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes

ECC83,12AX7,vacuum tubes

NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes

ECC83,12AX7,vacuum tubes

NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes

Made by Tungsram (Hungary).
Packing : in Tungsram box.

The NOS ECC83 (12AX7) Tungsram vacuum tubes have been checked by a calibrated Hickok 539B vacuum tube tester.

NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes NEW ECC83 Tungsram tubes

By the operating manual of the tester the minimum value
of the MC (Mutual Conductance) of the NEW ECC83 (12AX7) vacuum tube is : 875
This is taken as 100%.
(Given for each tube System 1 and System 2 [in Micromhos]).
On each tube I placed a little white sticker with the measurement results.

MUTUAL CONDUCTANCE TEST: here we can get exact
numerical value in Micromhos.
The condition of TUT (Tube Under Test) can be expressed in percent.
For example : in case of the NEW ECC83 (12AX7) listed minimum
value of mutual conductance is 875 Micromhos.
If the TUT has 1.500, the percental condition is
(1.500/875) x 100% = 171 %.

Result of the mutual conductance test, as follows :

Price USD

Date Codes

Comments

Photos

001

Triode 1 : 1.300 = 149 %

27.50 USD

"FC" = July 1978

SOLD

Box/a

Box/b

Triode 2 : 1.300 = 149 %