Hello, I have a 12 pin Photomultiplier tube and am wondering how many ohms should be on the resistors. There would be 11 resistors (1 between each pin) and no capacitors, anode grounding for DC operation, 1000volts, only to go off to an op amp for signal processing. This design is shown in Hamamatsu's PMT handbook but resistor values are not shown. They suggest between 100k ohms and 1M ohms for each resistor. Ib = 1000/(r*11). In some other types of circuits the first resistor is a different higher value. Any suggestions would be helpful. Purpose is for secondary electrons on phosphor in SEM. I chose this part of the forum because of the usual purpose of PMT tubes, although question is for resistor values, more info than simple ohms law is required.