USER’S MANUAL
Electronaut M63 Vacuum Tube Microphone/Instrument Preamplifier
8
E L E C T R O N A U T C O M P A N Y
Helvetica neue condensed black
tracked like crazy, like 400 or something.
Usual logo is without concentric circles.
Website has the concentric circles.
Mains Connections
The AC MAINS voltage select switch is set at the factory prior to shipping based on the shipping address or upon
special request at the time of order, and is indicated on the original packaging. The standard M63 accommodates
120 volt, 60 Hz operation, as well as 230V, 50 Hz operation. DO NOT OPERATE THE M63 WITH THE LINE
VOLTAGE SELECT SWITCH IN THE WRONG POSITION. For instructions on changing the line voltage setting,
see page 10.
OPERATION NOTES
Front Panel
Power Switch: The POWER switch turns on the M63 by applying the mains voltage to the power transformer.
Make sure the M63 is configured for the proper line voltage before plugging it in and turning it on. See page 10 to
configure the line voltage of the M63.
Pilot light: The pilot light shines when the M63 is powered on. See page 14 for instructions on replacing the pilot
light bulbs.
48V Toggle Switch: The 48V switch is a heavy-duty locking toggle switch that controls a high-quality,
small-signal relay which applies phantom power to pins 2 and 3 of the input XLR connector. To turn on the
phantom power, pull and lift the toggle into the ON position. Do not use phantom power unless a condenser
microphone that requires phantom power has been connected to the corresponding input XLR connector.
Although the M63 has been designed with a slow-start, slow-stop phantom power supply, it is good practice to
turn the TRIM and ATTENUATE potentiometers fully counterclockwise before flipping the 48V toggle switch.
Input Mode Switch: The input mode switch is a heavy-duty toggle switch that controls two high-quality,
small-signal relays which in turn provide three options. INSTRUMENT mode disconnects the input XLR and
the input transformer, and connects the unbalanced INSTRUMENT jack on the front panel of the M63 to the
input amplifier. The 0 dB setting disconnects the INSTRUMENT jack and connects the input XLR and input
transformer to the input amplifier. The -20 dB setting inserts a 20 dB PAD between the input XLR and the input
transformer.
Polarity Switch: The Polarity switch is a heavy-duty toggle switch that controls a high-quality, small-signal
relay which inverts the polarity of the signal at the output XLR.
Trim Control: The Trim control is a conductive plastic type potentiometer wired as an attenuator and placed after
the input amplifier. This is the main level control.
Attenuate Control: The attenuate control is a conductive plastic type potentiometer wired as an
attenuator and placed after the output amplifier. This potentiometer is useful to keep level under control when
deliberately overdriving the input amplifier. For normal operation, and especially in cases where the M63 is set
up to drive very long cables or equipment with an input impedance of 600 ohms, the ATTENUATE control should
be set fully clockwise (cranked!).
H
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commentaires sur ces manuels