V72 Tube Microphone Preamplifiers
THE V72 AS
A MICROPHONE PREAMP.
The V72 can be used unchanged in combination with high output tube condenser mics as described above. Because there is no internal gain adjustment, the signal has to be attenuated if necessary either with a pad circuit before the input of the V72 or after the output. If the V72 is used with low and medium output microphones or on lower signals, it is necessary to modify the internal circuit of the V72 to get more gain than the default 34dB. If this is done properly, the V72's original character is unchanged in any gain setting.
After long researches and carefully considering existing methods, I developed several modifications for the V72. The idea was to combine the V72's original character and warmth, linear frequency response and excellent noise figures with some missing features of the original unit.
I offer a limited number of V72 as a special version V72/55which
includes the following features:
(Please note that all V72/55 are fully restored and tested and come with a test protocol and an individual frequency plot. There is a 12 month warranty on the tubes of this units).
(Sorry, no units available at the moment)
Supersonic V72/55 special version:
Any V72 for sale? click here to go to the "For Sale" section
Circuit diagram of the V72: See or print V72' s original circuit diagram
Many thanks to:
Graeme J. Cohen (Valve Research) Athelstone/Australia
Institut fuer Rundfunktechnik/Freimann
SRT / Nuernberg
All rights reserved 1998-2006 by Supersonic Communications
Strictly no reproduction or publishing without written permission
Last modified: May 2009