6
UNPACKING AND INSPECTION
The amplifier is shipped in three cartons: amplifier, plate transformer, tube. Before unpacking
each carton, check the exterior of the shipping carton for any sign of damage. All irregularities
should be noted. Unpack and remove each component carefully from its carton, preserving the
factory packaging as much as possible. Inspect each component for any noticeable defect or
damage. Notify QRO Technologies if any defect or damage is apparent. Itisa goodideatokeep
all the shipping cartons and materials in the event the amplifier needs to be reshipped.
RESHIPMENT INSTRUCTIONS
Use the original packaging if it is necessary to return the amplifier, transformer,ortubeto QROfor
servicing. The original shipping carton and the interior corner pads are designed to provide the
necessary support for safe shipment or reshipment. If the original carton along with the internal
packaging is not available, contact the factory and a new carton will be shipped to you at a
nominal cost. Always insure the package for the full replacement value and ship via UPS ground
service. QRO Technologies, Inc. will not be responsible for any damage or loss during
return shipment.
TOP & BOTTOM COVER REMOVAL
Remove the Amplifier's top cover by removingthe fifteen 6-32x3/8PhillipsHeadmachinescrews
and their associated flat washers.
TRANSFORMER AND TUBE INSTALLATION
Before performing anyof the followinginstallationprocedures,make sure thatthe amplifier
has not been plugged into the AC supply line.
As part of the installation process, you must install the tube and transformer.
PLATE TRANSFORMER: Remove the plate transformer from its shipping carton. You willnotice
two indexed connectors. Position the transformer so the connector with the red leadsis ontheleft
and the connector with the black and white leads is on the right side when viewedfromthefrontof
the amplifier. Carefully place the plate transformer into the power supply compartment cavity
between the blower and the front panel meters. Align the transformer with the chassis mounting
holes and secure it to the chassis with four 1/4-20 x 5/8 mounting screwsand nuts.Locatethe two
amplifier's matching index connectors. Connect the two matching connectors. There is only one
way the two connectors can go together. When the two connectors are locked together, you
should hear a snap sound.
TUBE: The tube socket is located on the left side of the amplifier. The tube socket has seven
contacts which match the seven pins on the 8877/3CX1500 Triode. Remove the tube form its
shipping carton, and insert the tube into the socket making sure that the pinsalignwith the socket
contacts. The tube should seat without too much pressure applied. If you have to use a lot of
pressure, you most likely have the wrong pin alignment. If the tube pins and socket contacts are
not aligned, the amplifier will not function properly and damage to the tube may result. Once the
