Installing the Tubes
Be sure the amplifier is OFF (Power Switch Out) before installing any tubes or when any of the tube sockets are empty.
Wearing the cotton gloves provided with the amplifier when handling tubes will prevent skin oils from depositing on the glass surface of the tubes. The oils could cause the tubes to become “gassy” and fail prematurely.
Inspecting the tube boxes that come with the amplifier, you will notice that the boxes and power tubes themselves are labeled to corresponding sockets also labeled on the tube top surface. See Reference Diagrams for further clarification. Insert each tube in the cor- responding socket.
Starting with the 9 pin small signal tubes (the 6922s and 5687s), pay extra attention to the tube pins and socket holes for these tubes. You will notice an open space where an imaginary tenth pin or hole would be. This is for proper tube alignment. Be sure pins are in line with holes when installing tubes. Gently rock the tube into the socket until the tube is firmly seated. The 6922 tubes are inserted into sockets designated V1 to V3 and LV1 to LV3. The 5687 tubes are inserted into sockets V4 and LV4.
Note the larger space between two of the pins and holes for proper alignment of tube and socket.
DO NOT PLACE 6922 TUBES IN A 5687 SOCKET OR A 5687 TUBE IN
A SOCKET DESIGNATED FOR A 6922 TUBE. THIS COULD RESULT IN
DAMAGE TO THE TUBE, AMPLIFIER (OR BOTH) THAT WOULD NOT BE
COVERED UNDER WARRANTY.
The 5687 tube is designed to run very hot. In its implementation in the Power 2, it is being used at 1/3 its ratings. Even at this rating, the 5687 still gets hot and therefore, the 2 P e a r lTM Tube coolers should be installed over the 5687 tubes. The chassis has been designed with larger holes to accommodate these essential devices to keep these tubes “comfortable” and allow efficient operation. Just slide the coolers over the already installed tubes and add the rubber O rings around the coolers to clamp them in place. Hint: Add O rings before tube cooler is slid down fully.
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