• For use with 10-stage PMTs that fit standard 14-pin sockets
• Focus control for optimum performance
• Linear output available from anode or tenth dynode

The ORTEC Model 266 Photomultiplier Base provides voltage distribution to essentially all 10-stage photomultiplier tubes (PMTs) that fit its standard 14-pin socket. It provides capacitively-coupled linear output signals from the anode and the tenth dynode that can be used in either timing or linear pulse height analysis systems. This arrangement allows the use of either polarity of output without an inverting amplifier. High-quality signals are maintained when these outputs are fed through 50-W terminated cables or directly into a linear preamplifier such as the ORTEC Model 113 Scintillation Preamplifier. The Model 113 output is fed into one of the ORTEC main amplifiers, where it can be either active-filter- or delay-line-shaped for analysis. The focus control on the Model 266 allows optimum adjustments for the best performance of the particular PMT.

The Model 266 is compatible with most standard 10-stage PMTs that fit standard 14-pin sockets, including those listed in Table 1.

Other compatible tubes may be determined by comparison with those that are listed (also see Figs. 1 and 2). Note that all photomultiplier tube specifications are given by the PMT manufacturer.

Table 1.  Compatible Photomultiplier Tubes

Fig. 1   JEDEC B14-38 PMT Pin Base with Pin Assignments:

Fig 2.  Simplified Schematic Diagram for the ORTEC Model 266 Photomultiplier Base.

ORDERING INFORMATION