Engl TUBE PREAMP 570, Руководство оператора

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Handling and Care:
Keep the preamp safe from hard knocks and shocks. Tubes are fragile and tend to
suffer when exposed to mechanical stress!
Let the preamp cool down before you transport it. Ten 10 minutes or so will do to
spare the tubes.
Tubes take some 20 seconds to warm up after you switch the power on. Make a habit
of giving your preamp plenty of time to get toasty before you start playing.
Avoid storing the preamp in damp or dusty rooms to spare jacks, switches and
potentiometers. If you don't use the preamp all the time, I recommend that you drape
a covering over it to prevent the intrusion of dust.
If you install your preamp in a 19" rack, close the rack's lid when not in use for extended
periods.
Never use caustic or scouring detergents to clean the preamp's housing, front or rear
panels. Use a soft, damp cloth or sponge with diluted soapsuds or a standard brand of
mild dishwashing liquid instead. Never use solvents they can dissolve the front and rear
panel labels. Keep liquids well away from the preamp, particularly the interior of the
housing.
Make sure air can circulate at the two sides and rear panel of the preamp to allow for
adequate cooling, which increases component life.
High ambient temperatures place an additional strain on diverse components; so if at
all possible, avoid operating the preamp at temperatures far higher than 30°C for
longer periods. Running the preamp at mains voltages exceeding the nominal mains
input voltage over longer periods can also shorten component life.
Replace tubes with selected tubes that satisfy ENGL selection criteria to forestall
microphonic properties, undesirable noise and loss of Gain. Tube replacement is a job
best left to experienced and authorized specialists.
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