The mesytec MPR-HV-Series provides a set of state of the art multichannel preamplifier modules, capable of supplying bias voltages of up to ±4000 V. It is specially well suited for amplification of signals from He3 detector tubes which are used for thermal neutron detection. The MPR16-HV series can easily be combined with the mesytec MDPP-16/32 pulse processors or MSCF-16 shaping / timing filter / discriminator module.