User manual

Replacing tubes
The EARTUBE-1 uses three tubes 6N3P and two tubes GU17 (or its equivalents QQE03/12, RS1023,
6360)
If you want to exchange tubes, please disconnect the power cord before removal of the top cover. Also
make sure that all pins are properly mounted into the sockets. It is not uncommon that a pin is bend
and doesn't enter the socket.
Do not run the device without the top cover in place!
Technical data
Measures: 28 x 30 x 11 cm
Weight: 6.0 kg
Power supply: US-Version: 100/120 Volts, 50/60 Hz
European Version: 200/240 Volts, 50/60 Hz
Maximal amplification (1 kHz): 16 dB at 200 Ohm
Maximum output: 35 Volts at 200 Ohm
Input impedance: 47 kOhm
Output impedance: 20 Ohm