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Siemens V72 tube mic preamp

Product number: TAB30

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Tube module. Often used as a mic preamp. 34DB gain. Can be modified to have 56dB Gain

Weight: 5 kg

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• Description

History:

The historic V72 module was developed by the german radio (NDWR) between 1949 and 1952 as a microphone and main studio amplifier. It was modeled on the V41 and the circuits are very much the same with the exception of the gain control section. By 1955 it was the standard preamplifier in German radio stations.  Later, with the introduction of the V76, it was replaced as an input module and relegated to use as a buffering amplifier until it was decommissioned by the IRT and replaced by the V72t transistor version in 1963.

 

Design:

The V72 is a self contained amplifier with a fixed gain level of 34 dB.  It was originally used as a microphone amplifier used in conjunction with a Neumann W75k high pass filter and as a buffering amplifier to make up for loss of the passive fader like the Danner MR66/88 and Eckmiller W86 EQs. Nowadys the unit is used a s a vintage tube mic preamp in recording studios all over the world. Gain control can be acomplished by adding a rotaray switch as input PAD or by modifying the unit and adding a gain pot. The mod gives you gain control from 0dB to 56dB.

 

Sound:

There must be areason why the V72 is one of the most sought after mic preamps today. The V72 sounds fat and colourful, but still very natural and "real". When compared with the V76 people often say the V72 sounds a little thicker and has more depth then the V76.



Features:

- Transformer balanced inputs and outputs

- 34dB of gain (fixed)


- Early modules came with EF40 tubes

- Later modules had EF804 and EF804S tubes installed 

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