AMPEREX TUBE TYPE 12AU7/ECC82

The 12AU7/ECC82 [1] is a miniature, low-gain, medium-mu twin triode, each
section of which has an individual cathode connection. The construction of
the 12AU7/ECC82 is such that noise and microphony are reduced to a minimum.
Hum is reduced by use of a coiled tungsten heater. A center-tapped heater
permits operation of the tube from either a 6.3 volt or a 12.6 volt supply.




GENERAL CARACTERISTICS


  ELECTRICAL

   Cathode                             Coated, unipotential

                                          Series Parallel
   Heater Voltage, AC or DC                12.6    6.3 volts
   Heater Current [2]                      0.15    0.3 amps

   Direct Interelectrode Capacitances
                                       With Shleld[3] Without Shield
     Grid to Plate (each section)           1.6         1.6 uuf
     Input (each section)                   2.0         1.8 uuf
     Output (Section 1)                     2.1        00.5 uuf
     Output (Section 2)                     2.1        0.37 uuf

MECHANICAL

   Maximum Overall Dimensions
     Length                                  2 3/16inches
     Seated Heigbt                           1 15/16 inches
     Diameter                                7/8 inch

   Mounting Position                         any

   Base                             Small Button, 9 pin
                                        RETMA# 9A





[1] The 12AU7~ECC82 is a direct, high-quality replacement for other brands
of the 12AU7

[2] When used in equipment which employs series - connected heaters, a
current-limiting device must be inserted to limit the current when switching
on.

[3] With external shield (RETMA # 315) connected to cathode of section under
test.