EH 12AU7 / ECC82
EH 12AU7 / ECC82
EH 12AU7 / ECC82

EH 12AU7 / ECC82

Product No.:
eh12au7
In stock for immediate delivery. Delivery time depends on the destination country* In stock for immediate delivery. Delivery time depends on the destination country*
RoHs:
conform
Weight:
0.016 kg per piece
16,60 €

incl. VAT excl. Shipping costs

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Description
  • Medium-Mu twin triode for use in preamplifier and driver circuits

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Safety Information
Safety Information for Vacuum Tubes

For all electrical, electromechanical and mechanical components, the specifications and operating parameters arising from the respective type standard generally apply.
Further information, where available, can be found in the respective data sheets and product descriptions included with the product.

General Information

  • NOT SUITABLE FOR CHILDREN - choking hazard due to small parts
  • NOT SUITABLE FOR UNTRAINED PERSONS - danger to life due to high voltages
  • The safety and processing requirements applicable to the component must be observed
  • CE conformity applies only when installed professionally
  • Warranty becomes void in case of improper handling
  • The operator is responsible for proper installation
  • Local regulations and VDE provisions must be complied with
  • Never exceed the rated power
  • Never exceed the rated voltages and currents

Required Expertise

  • Use of measuring instruments (multimeter, oscilloscope) and evaluation of measurement results
  • Safe handling of high voltages (up to 500V and more)
  • Reading and understanding circuit diagrams
  • Selection of appropriate tools
  • Knowledge of electrical components and their characteristics
  • First-aid knowledge for electrical accidents
  • Knowledge of VDE regulations and safety requirements

Amplifier Tubes

  • Hazard due to high voltages
  • Hazard due to very high heat generation
  • Hazard due to glass breakage
  • Hazard due to UV radiation in case of defective tubes
Manufacturer
Herstellerinformationen | Manufacturer Information
  • Sovtek
  • Electro Harmonix
  • Tung-Sol (Reissue)
  • Svetlana (Reissue)
  • Genalex (Reissue)
  • Mullard (Reissue)
New Sensor Corporation, 32-33 47th Avenue, Long Island City, NY 11101, USA

EU-Wirtschaftsakteur | EU Economic Operator
Tube-Town GmbH, Rumbergring 37, 66969 Lemberg, Germany, info@tube-town.de
Customer reviews

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Bias-Probe Octal, KIT
Bias-Probe Octal, KIT

Kit of a bias probe for indirect measurement of the quiescent bias current of a tube. The adapter is placed between the tube and the socket and is connected to a standard voltmeter (not included). Pay attention to the quality of the meter and to sufficiently charged batteries!

The quiescent current is measured indirectly via a precision resistor built into the adapter. The advantages of this measuring method are harmless voltages in the mV range at the measuring plugs as well as short ways for the current, since it does not have to be led through the measuring device (common practice with many measuring adapters of Far Eastern production). As a result, there is no risk of oscillation of the amplifier, which could damage the tubes or the amplifier itself.

Note: This adapter cannot be used when additional tube brackets are installed. These must be removed before using the measurement adapter and reattached after the measurement is complete.

Measurement procedure
Determine the resistance of the adapter, including the test leads. Connect the adapter to the meter, but do not connect it between the tubes and the amplifier. Select the ohms range on the meter and note the reading, e.g. 1.1 ohms.
For the final measurement, insert the adapter between the tube and the de-energized amplifier, connect it to the meter, select the mV range and switch on the amplifier. When the amplifier has reached a stable operating condition, read the value in mV from the meter and calculate the quiescent current using Ohm's law.

Example
Measured voltage = 47 mV, adapter resistance = 1.1 ohms.
Formula (I = V / R) or in this case
Bias Current (in A) = Measured Value (Voltage in V) / Measured Value (Resistance in Ohm)
0.047V / 1.1 Ohm = 0.042A or 42mA

For the calculation of the correct bias current as well as further information on bias measurement please refer to further documents or the bias setting instructions in the info section as well as the manual of the amplifier itself.
This adapter is suitable for all EL34, 6L6, 6550, KT88, 6V6, 6CA7 and other tubes with the same pinout.

Attention HIGH VOLTAGE ! Measurements and work on tube amplifiers should only be done by qualified personnel.

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