FEU-35 PMT schematic

Scintillation crystals, PMTs, voltage dividers etc...
invader
Posts: 24
Joined: 20 Jan 2025, 00:00

FEU-35 PMT schematic

Post by invader » 20 Jan 2025, 00:15

Hello,

does anyone uses FEU-35 ?
How well does it perform?

What schematic did you use for voltage divider ?
Any capacitors with the voltage divider ?

best regards
Paulo

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Madmax
Posts: 43
Joined: 12 Feb 2023, 09:17

Re: FEU-35 PMT schematic

Post by Madmax » 20 Jan 2025, 11:11

Older analog of feu85, quality is a lottery because of long time passed since its production. Can be used for experiments.
More data here: https://istok2.com/data/2850/

invader
Posts: 24
Joined: 20 Jan 2025, 00:00

Re: FEU-35 PMT schematic

Post by invader » 09 Feb 2025, 03:08

In these pdf, the resistors are 100K, if I use 10M resistors I was thinking to adjust the capacitor value in the same proportion, 100 times smaller, what you guys think of this ?