Tube Replacement/Rolling:
The amplifier operates the tubes in a
manner that maximize tube life and the tubes are expected to last
over 10 years of regular use. The sockets are tight, so gently rock
the tube pins until you are able to remove the tubes. We use high-
quality ceramic tube sockets with gold pins which are designed in
such a way that the white ceramic part may shift slightly. This is an
intentional design; the tube socket is very secure.
We have heard no reports of any trouble using equivalents of
6SN7, 12SN7, or 12AT7 tubes. For lower gain and a more laid-back
sound, you can substitute 12AU7 tubes for the 12AT7s. Do not use
12AX7s. When replacing the tubes, use matched pairs.
Fuses
: The microZOTL Preamplifier has a fuse on the audio board
and two fuses in the LPS+. All are 5x20mm. There is a 2.5A Fast Blow
fuse on the audio board and there are two 4A Slow Blow fuses in
the IEC inlet of the Power Supply.
For more information and FAQs, please visit
www.lineartubeaudio.com or contact us at
