overview Description of modules is extracted from the Neve 51 service manual This device contains 2 preamplis + 2 equalizers from a NEVE 51 serie mixing desk. Each channel consists of one micro/line preampli, one high pass and low pass filter section.
Preampli module Input section : The microphone sensitivity control gives gain steps of 10dB. The front panel legend gives overall channel strip gain the signal is attenuated by -16dB by the input section so that a signal input of OdBu gives a pre-fade level of -16dBu. ·Positions 1,2 and 3 of the control switch in a 30dB pad which with the rotary control gives the required attenuation.
Dynamics section There are three modes of operation : 1) Hard Limit « HL ». Limiter will not allow peaking value set above set ‘TRESH’ value. If the signal level exceeds the set value the gain of the circuit is reduced by the control side chain so that the level of the ouput signal equals the threshold set value.
Equalizer module Equaliser section : The equalizer is a 4-band type with mid 1 and mid 2 peaking and low and high bands peaking or shelving. Each band has adjustable frequencies and cut/ boost. The frequency bands are overlapping and the cut/boost range is ±17dBs. Low and high bands have a Q factor of 0.72 and mid 1 and mid 2 have a Q factor of 2.
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interconections To facilitate the implementation of these Neve 51 modules, interconnections boards have been developed. These cards use double sided plated through holes printed circuit boards (PCBs). To connect the preamp and EQ modules to these cards, originals flat cables of the channelstrips are used. This boards also allows PSU connections distribute various voltages to modules.
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