12AT7 RCA, Early square getter (V41)

Beschrijving

Early square getter 12AT7, made by RCA in the USA

This is an 12AT7  tube. The text on the glass indicates that the tube is produced by RCAt in the USA. The tube has a tilted square getter, a half box plate structure and back plates, see pictures. Healthy tube! 

Sonics

I have no information about the Sonic performance of this tube.

Test results*

The tube tests NOS. The internal balance between the triode sections is good. The measurement data below illustrate that the tube is in excellent condition. 

Valve V41

Ia (plate current): Transconductance (Gm): Gas test, Shorts test:

9,0 / 9,1  mA     4,5 /4,8 mA/V OK

=  NOS / NOS =  NOS / NOS

Where NOS is : Ia = 7 to 14 mA, Gm= 4,5 to 6,5 mA/V. 

  *  For test methods and factory specification read the tube testing page.

Short description