The amplifier can be cleaned with a dry cloth or a brush, do not use wet cleaning, wet
cleaning can cause damages !
PLEASE NOTE : only use the original tube type, no tubes from different manufacturers even
if they carry the same type indication !
Technical Information :
The brinkmann preamplifier MARCONI impresses with its puristic design, featuring only the
minimum of controls. The control panel includes left hand the level switches for the right and
left channel, the input selector, in the middle a display that indicates some operatings
information, right hand the volume control and a "mute" and "on-off" push button. The
operation settings may be done directly at the amplifier; input selection, volume and "mute"
can also be driven via remote control.
The buffer stage for the tape recording output "rec" always carries the signal of the choosen
input, regardless of the volume setting.
All inputs and outputs are switched off while in the stand by mode; the amplifier should be
in mute mode when it is not in use for a certain time.
Display :
The display shows the gain of the output stages, independently adjustable for each input and
each channel, from 0dB to 12,5dB in steps of 0,5dB.
When the corresponding input is selected, the display shows i.e. "lin1-0dB". The top line
shows the left channel and the bottom line the right channel.
Now the gain can be programmed by the level control switches from 0dB to 12,5dB. The
level can be changed as long as the input is selected, the level will be stored automatically
when another input is selected. By selecting the former input again, the last programmed
gain is still stored. The programmed levels of the several inputs also stay stored when the
preamplifier is disconnected from the mains and are available again when the preamplifier is
connected for the next time.
The display also shows the phase degree of the output signal, 0° says : the phase of the
output signal is the same as the phase of the input signal, 180° says : the phase of the output
signal is 180° shifted according to the phase of the input signal; the phase is inverted.
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