Cary Audio Design CAD 211 AE Owner's Manual page 12

tube pins into the socket the wrong way if you are not careful! If you install the tube wrong you will probably
damage the amplifier and the tube. This damage will not be covered by the manufacturers warranty for a new
amplifier. If you have any doubts about this, have the 300B tube installed by your dealer. If you will look carefully at
the pins and install the large pins to the front of the socket all will be fine! These 300B tube pin installation
instructions are valid for the 211 AE only.
300B Tube Socket Pin Layout in the CAD 211 Amp Chassis
The LARGE pair of tube pins should be installed toward the front of the CAD 211 amplifier tube socket. LOOK
CAREFULLY at the tube pins to be sure you insert them correctly. It is possible to force the tube pins to plug in
the wrong way in the socket! PLEASE BE CAREFUL INSTALLING THE 300B TUBE! If you install the tube wrong it
will certainly blow a fuse and it may damage the amplifier. Correct placement is easy after looking carefully at the
pin sizes and the pin socket hole sizes in the tube socket.
Front of the tube socket installed on the CAD 211 chassis
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