User guide
6
Installation
Vacuum Tubes
Before you operate the VSi75
Your VSi75 amplier is shipped with the vacuum tubes packed in foam
blocks. These must be unpacked and installed before you attempt to
operate the amplier. Included are two matched pair of KT120 output tubes,
and two 6H30 dual triodes used in the input stage. Proceed according to
the following instructions.
Carefully remove each vacuum tube from its protective foam and match
its location “V” number (written on the base of the tube) to the “V” number
printed next to each socket. Firmly seat each tube in its matching socket,
taking care to “key” the tube pins to the socket holes. Retain the foam
blocks with other packing materials for possible future use.
If you are using the optional tube cover, be sure the VSi75 is rst turned off.
Remove the top cover screws, and install the cover on top of the top plate.
Insert and retighten screws.
Note: double damping rings are installed at the factory on each 6H30 tube
for maximum sonic performance.
V5 V6
V2 V3V1 V4