AKG SOLIDTUBE Modo De Empleo página 4

After switching on the microphone power on the power supply unit,
please allow a few minutes for the tube to warm up so as to get the
full, warm "tube sound".
If the microphone should be used with extremely loud sources of
sound e.g. in front of guitar amplifier speakers etc., then it is advisa-
ble to push the attenuation switch on the microphone housing
downwards to the –20 dB position. With this you can be certain that
any distortions do not come from the microphone but either from
the sound source itself or from the equipment connected after the
microphone such as, for example, input stages of mixing consoles
or other causes.
2. The N-SOLIDTUBE Power Supply
Unit
The power supply unit does not only supply the vacuum tube with
heater and anode voltage but also contains the switchable bass cut
for the microphone at about 100 Hz in order to be able to filter out
possible low frequency interference noise components. The control
knob for this is found on the front of the power supply.
PLEASE OBSERVE CLOSELY!
Dangerous voltages occur in the N-SOLIDTUBE. Opening
the mains unit must definitely, therefore, be done only by
qualified service personnel.
Before starting-up the power supply unit please satisfy yourself
about the local mains voltage and compare this with the value set
on the unit's voltage selector (next to the power switch). If a change-
over of the accepted operating voltage should be necessary then
this can be done very easily with a small flat-bladed screwdriver.
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Before doing this, please remove the
mains connection cable from the
mains supply!
Place the screwdriver in the notch provided for this on the fuse hold-
er, press the spring-loaded tongue gently to the right in the direction
of the voltage indicator and lever the whole fuse holder out of the
socket. Then, please pull the light plastic part with the fuse out of
the carrier part, turn the fuse link through 180º and insert it again in
the carrier part until it engages. The desired mains voltage should
now appear in the window. The complete carrier part can then be
inserted into the socket again until this also engages.
You can also proceed in exactly the same way should the unit fuse
ever be damaged. In doing this, care should be taken that only a
new fuse of the same value (T 125 mA) must be inserted.
Should another type of power plug be usual in a country in which
the unit is to be operated then you should buy and use in that coun-
try a complete power cable which complies with the international
safety regulations and which has a plug with device grounding.
If all the above checking steps have been completed, the connect-
ing cable has been plugged in between the microphone and the po-
wer supply, the audio connection to the after-connected equipment
has been made with standard audio cable, and the plugged-in po-
wer cable has been connected to a power socket, then both the
control light on the front of the power supply should light up after
switching on the power supply unit mains switch and also the tube's
heating element should glow red-orange through the window (AKG
logo) on the microphone itself. With this the microphone is essen-
tially ready for operation.