Thermionic Culture THE FAT BUSTARD II 12 Channel Summing mixer - Manual (Page 12)

© Thermionic Culture Ltd, May 2011 11
6 Servicing & Maintenance
The unit comes with a 12 month warranty covering all parts,
including valves. It is essential that it is returned to our factory or to
the dealer from which it was purchased for repairs to be carried out
otherwise the warranty is invalidated. There is, however, one
important exception to this rule:
6.1 Valves
It is quite safe for the user to change the valves, but the unit
must not be operated without all valves plugged in
. If a
fault occurs, it may be a valve, so unplug the mains and
remove the top cover.
The two input valves are nearest the front panel and there is
one for each channel. Similarly, the two output valves are at
the rear (the large hot ones!).
You can swap the valves from side to side to isolate a fault, in
fact we recommend that you swap the two 5965 valves after
about 18 months to prolong their life.
Valve complement (spares are available from Thermionic
Culture Ltd.):
Input - 2 x 5965;
Output - 2 x 6SN7
Stereo spread 1 x 12AU7 (ECC82)
6.2 Operating voltage / Fuse
The Fat Bustard is switch selectable to operate from either
230V or 115V 50/60Hz AC mains supply.
NOTE: Mains fuses may be replaced in accordance with the
following table:
Operating Voltage Fuse Rating
115V T2.5A 20mm type
230V T1.25A 20mm type