2 pcs . 6N1P  Fryazino 1955 - 1957' Rare! ~ ECC88 , 6DJ8 , 6922 6N1P-EV Old stock, NOS

Dual Triode Tubes GOLD GRID ,  Military acceptance ! (USSR) 

 "Used, Tested  , #1  VI.1955' Ia1=9.29 S1=5.3 , Ia2=9,21 S2=5.6 

                            #2   V.1957 Ia1=8.62 S1=5.0 , Ia2=9.4 S2=5.3 

  GOLD GRID 6N1P TUBES ~ ECC88 , 6DJ8 , 6922 OTK 

All tubes warmed and perfect tested Ia= 250 v , G=-4 v

The measured parameters ( S and Ia for each half tube ) are attached to each lamp !

Each tube contains 0.0012g gold in the grid

Please ask for actual tubes measured parameters and date .