Specifications

6
When installing the 6550C/KT88 power tubes, match the numbers designated on the
metal base of the tube or the tube boxes to the corresponding markings printed on the
tube top (V7 through V14) and be sure the center pin key locator is in alignment with the
slot in the center of the socket. Again push down the tube, rocking gently until it is firmly
seated.
Note the locating center key
and notch for proper
alignment of tube and socket.