ORTEC (AMETEK)
ORTEC
ORTEC 113
Preamplifier
- Rise time
- <60 ns
- Designed fall time constant
- 50 µs, assuming a signal source impedance of 1 MΩ
- Integral nonlinearity
- ≤±0.02 %
8 referenced values
Bild: ORTEC
ORTEC 265A
PMT base for 12-stage, 21-pin photomultipliers, for fast timing
Mechanical assembly and resistive voltage divider with capacitive decoupling for 12-stage photomultiplier tubes. It is particularly suited to fast timing and single-photon counting and provides a dc-coupled anode signal for timing and a linear signal from the ninth dynode for energy measurements.
- PMT compatibility
- 12-stage, standard 21-pin sockets, including Hamamatsu R329, R1332, R1333 and Burle 8575, 8850, C31000M1
- Weight
- 0.63 kg net1
Download product sheet (PDF)All values with references – for tender documents
Specifications checked against the manufacturer’s documents on 2026-10-17
Overview
Key features
- DC-coupled anode with 50 Ω load – no baseline shift at varying count rates
- Last four dynodes available for external voltage stabilisation
- Model 218 magnetic shield available
Specifications
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
| PMT compatibility | 12-stage, standard 21-pin sockets, including Hamamatsu R329, R1332, R1333 and Burle 8575, 8850, C31000M1 |
|---|---|
| Detector bias | Negative high voltage to the cathode: −3 kV maximum, 2 mA maximum for the bleeder (SHV)1 |
| Signal outputs | Anode: negative timing signal, 50 Ω, dc-coupled, back-terminated (BNC); ninth dynode: positive linear signal, capacitively coupled, high impedance ~1 MΩ (BNC)1 |
| Use | Fast timing and single-photon counting; timing and energy measurements with fast plastic and liquid scintillators and NaI(Tl)1 |
| Weight | 0.63 kg net1 |
| Dimensions | Ø7.62 × 20.32 cm1 |
The data comes from the manufacturer’s published documents. Manufacturers may change specifications; the current configuration and performance are confirmed in the quotation.
Documents
Sources
The number after each value refers to the source listed below. Values are as published by the manufacturer; the exact configuration is always confirmed in our quotation.
- 1
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ORTEC
ORTEC 276L
Low-power PMT base with preamplifier
- PMT compatibility
- 10-stage, 14-pin; TRW 3B14 socket (JEDEC B14-38); directly compatible with many integrated NaI-PMT assemblies
- Conversion gain
- Nominally 5 µV/eV with a 2 × 2 in NaI(Tl) crystal and PMT gain of 10⁶
- Weight
- 0.65 kg net
14 referenced values
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ORTEC 269
PMT base for 14- and 12-stage, 20-pin photomultipliers
- PMT compatibility
- 14- or 12-stage, 20-pin socket (JEDEC B20-102), including Hamamatsu R1250; Philips XP2020, XP2020Q, XP2040, XP2040Q, XP2041, XP2041Q, XP2212B, XP2230B, XP2233B, XP2262B; EMI 9813K
- Weight
- 0.63 kg net
6 referenced values
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