Chapter Nine: Maintenance and Cleaning
9.1
Cleaning
Never use a wet method of cleaning the amplifier, i.e.
any
amplifier. Usually it is
sufficient to wipe down the outside of the amp with a slightly moist cleaning rag.
Do not use abrasive cleaning chemicals. Sometimes a vacuum cleaner can be used
to remove dust and dirt from nooks and crevices. Do not remove the chassis from
the housing to clean the amp. The inside of your amp carries dangerous voltages.
9.2
Care
Be gentle with this amplifier. Any mechanical shocks and wide temperature
changes, moisture-rich environments and extreme conditions (dust, wind, heat,
cold, moisture) can substantially shorten tube life, in some cases, even amplifier
life.
Do not block the air circulation grilles in the front and in the back of the amp. Do
not push the amp right up against objects that would interfere with its normal
airflow. The top of the amplifier might get warm after prolonged use, this is
normal, but will melt your ice cream and definitely ruin your beer. Never put
beverages on top of the amp where they could spill and flow inside the amplifier.
You’ll hate it if this happens, guaranteed!
9.3
Tube Change
Tube changes are only to be undertaken by authorized service personnel. If
power tubes with different values then the original ones are to be installed, then
the amplifier must be re-biased before operation can be resumed. The amplifier
uses a three circuit bias system. It is quick and easy to accomplish biasing, but
involves removing the chassis and use of specialized equipment for measuring
currents inside the amplifier. Only trained professionals should attempt this
procedure.
Salwender International and the Diezel Company wish to express their gratitude
and congratulate you on your decision to purchase the Diezel Herbert Amplifier.
