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UNPACKING AND INSPECTION
The amplifier is shipped in three cartons: amplifier, plate transformer, tubes/control transformer.
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.
RESHIPMENT INSTRUCTIONS
Use the original packaging if it is necessary to return the amplifier, transformer, or tube to QRO
for 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 COVER REMOVAL
Remove the Amplifier's top cover by removing the ten 6-32 x 3/8 Phillips Head machine screws
and their associated flat washers. The sides of the top cover may bend outward when the screws
are removed. This is normal, and they will return when you replace the screws and washers.
TRANSFORMER AND TUBE INSTALLATION
Before performing any of the following installation procedures, make sure that the amplifier
has not been plugged into the AC supply line.
The Amplifier is shipped with the tubes , plate transformer, and filament transformer each shipped
in a separate cartons. As part of the installation process, you must install the tubes and
transformers.
Filament & Control Transformer: Remove the filament & control transformer (smallest
transformer) from its shipping carton. You will notice one indexed connector on the ends of the
transformer leads. Place this transformer in the rear of the power supply compartment next to the
blower. Position the transformer so the transformer leads and indexed connector is on the right
side when viewed from the front of the amplifier. The four mounting holes on the chassis should
align with the transformer mounting feet. Use at least three of the four 1/4-20 x 5/8 screws and
nuts to secure the transformer. One mounting foot is difficult to reach, and it is not absolutely
necessary to secure it. Locate the amplifier's matching index connector. 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.
PLATE TRANSFORMER: Remove the plate transformer (large transformer) from its shipping
carton. You will notice two indexed connectors. Position the transformer so the connector with the
red leads is on the left and the connector with the black and white leads is on the right side when
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