TELEFUNKEN Elektroakustik ECC83-TK Pre Amp Vacuume Tubes

The TELEFUNKEN ECC83-TK is a vacuum tube suited for all types of music and playing styles. Designed to allow for cleaner headroom than higher gain 12AX7s when pushed into overdrive, it offers distortion with strongly defined lows, a rich mid range and clean, smooth highs.

Developed by RCA and released in September of 1947, the 12AX7 is a high gain / low noise tube that is the most popular tube used in input / inter-stage audio amplifiers. The dual triode design makes the 12AX7 compact, relatively inexpensive, and produces a high quality full frequency response.

12AX7's are known for their rich even order harmonic distortion when driven into overdrive. Even order harmonics fit into the western musical scale and are more pleasing to the ear than the harsh odd order harmonic distortion created by transistors. The 12AX7 is also known as the ECC83, which was the European designation found on tubes from Phillips / Mullard.

Technical Specs

Type
R.F.Dual Triode
Base
Noval
Number of Pins
9-pin

Indirect by A.C. or D.C.

Heater Voltage
6.3 V
Heater Current
300 mA

Heater Voltage
12.6 V
Heater Current
150 mA

Grid to Cathode and Heater
1.6 pF
Plate to Cathode and Heater
0.33 pF
Grid to Plate
1.7 pF

Plate Voltage
300 V
Plate Dissipation
1 W
Cathode Current
8 mA
Grid Voltage
-50 V
Grid Resistor
2,2 M?
Cathode to Heater Voltage
-180 V
Cathode to Heater Resistance
150 k

PlateVoltage
250 V
Grid Voltage
-2 V
Plate Current
1.2 mA
Transconductance
1.6 mA/V
Internal Plate Resistance
62.5 k
Amplification Factor
100