1.2
Warranty
Diezel GmbH of Munich, Germany offers a 1-year transferable warranty on the
product “Herbert”. Diezel GmbH of Munich offers a lifetime non-transferable
warranty to the ORIGINAL purchaser of the product: “Herbert”. The product
must be registered and a dated sales receipt must accompany the registration.
Excluded from this warranty are all vacuum tubes, and any abuse of the amplifier.
Also excluded from this warranty are damages due to not following the Safety
Warnings in 1.1 above.
Diezel USA is the local executor of this warranty. Customer is responsible for
shipping charges to Diezel USA in Orange, California, unless other arrangements
are made in advance.
Chapter Two: Using Your Herbert
2.1
Mains Connections, Power and Standby
2.1.1
Mains/Connection to Power Outlet
Please make sure that both switches (Power and Standby) are in the off position
before connecting to the Mains circuit. Verify line voltage before connecting the
power cord. Never start Herbert without speakers being connected to the proper
terminals. (See 3.2.8)
2.1.2
Power up, Warm up, Standby off
First turn the Power switch to on (facing up). The indicator will light up. This
starts the tube heating process. After about 40 seconds, the tubes have
sufficiently heated for normal operation. Your Herbert is now ready for operation
and the standby switch can be turned to “run” (also facing up). Premature
activation of the standby switch will lead to unnecessary tube stress and
subsequent reduction of the power tube’s life span.
2.1.3
Power Tube Caution
Tubes are electronic components that only function with vacuum intact and under
very high operating temperatures. Each tube has one or more heating filaments,
much like a light bulb. These filaments heat up the Anode of the tube. If you
switch the standby switch before these Anodes have reached their operating
temperature then the Anode surfaces are not heated evenly yet; the “operating
temperature” of the tube is not reached yet. This causes undue stress on the tubes
and their related components inside the amp. One should therefore always give
the amp it’s much needed warm-up time, even if musical inspiration hits with full
force.
