Mastersound PF 100 Limited - Manual (Page 6)

M a s t e r E m o t i o n 6
Tubes installation
During the transportation the tubes are kept in an appropriate box and then they must be
placed in the correct position (see the photo above).
The 845 tube is indicated either by letter A or B, which stand between the pins and are
written on the base: that is the right place for the tube to be installed.
BE CAREFUL: there is only one correct position for the tube! So please check the right
position of the four pins and do not force the installation in any way: You could seriuosly
damage the sockets .