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TAB-Funkenwerk Studio Preamp V72s

V72Art.jpg

Six years ago we started the recreation of the V72, after several different prototypes were send a couple of times from our manufacturing place in Seattle Washington/US, to two former TFK engineers in Hannover/Germany and back, we got the final version of the New V72S. Aside several problems in locating sources for original parts, like lamination, bobbins, etc. we good a 19 inch version based on the historic V72, with same classic sound.

Most manufactures that were involved in the 1950 and 60, didn't exist anymore, but by luck we recovered several production tools and machinery, that were liberated buy former employees before they were laid off when those companies closed in the early 1980s. After rebuilding them and recreating the missing tools from scratch (to detailed instruction by those old gentleman) we finally build the first production version of the V72S in 1998.

All components are made here in Gaylord/KS in every detail to the historic production drawings of the early 1950s and fit also as replacement in the historic V Series units.
We incorporated several more modern production materials, like silverplated Teflon wire, high insulation magnet wire, etc. to insure the safe use of phantom power, without blowing up the input transformer.

click here to download V72s Brochure!

 
Technical Specifications

 

Description:

Two channel microphone preamp with two separate power supply in 1U 19 inch rack chassis. Circuit based on the classic Studio amplifier V72s of the 1950s, made by companies such as TAB, TFK, Siemens, etc....

See open V72s pic...

Frequency response :

20 to 15,000 Hz.........</= 0.3 dB

10 to 27,000 Hz.........</= 1.0 dB

fixed frequency cut : over 27kHz -6dB/octave

switchable frequency cut : under 80 Hz -6dB/octave

reference frequency 1,000 Hz @ 36dB setting input load 200 Ohm output load 600 Ohm, input level -28 dB and -68dB


Gain settings : 12 position from -6 to 60 dB in 6 dB steps, setting -6 to 18 dB incorporate a frequency compensated resistive pad.


THD@ +12dB/3.1V output level :

k@40 Hz </= 0.4%

k@1k Hz </= 0.1%

k@15k Hz </= 1.0%


Signal to noise ratio @ 36 dB Un</=90 dB


Phantom power to IEC 268-15/DIN 45 596 +48V 15mA

Toggle Switch with indicator light located on the front panel


Phase reverse, output relay by toggle switch with indicator light located on front panel.


XLR input/output connectors located on the back panel, pin 2 hot. 1/4 inch/6.3mm (TRS) upon request.


1/4 inch/6.3mm DI input, located on front, activated with toggle. Input impedance 1M Ohm, 7 gain settings in 6 dB steps with main gain selector.


3 soft ground switches located on back. For both main outputs a 1M soft ground for pin 1 and a 100 Ohm soft ground switch for 0-Volt and Ground/PE.


Tube set-up: Standard set-up are EF866/EF806s, upon request we supply TFK made tubes EF40, EF804s/806s.


Unit handmade in the USA by AMI Gaylord/KS. All specifications are minimum values and are subject to change without notice...

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Copyright 1999-2005 by AMI. All rights reserved. TAB-Funkenwerk is a registered trademark of Jester Products LLC. Seattle, WA USA

AMI / TAB-Funkenwerk * 506 2nd St * Gaylord, KS * 67638