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Brazing of the Fernico Base Plate

Brazing Machine Full View

Steel Tube Pumping Machine Version 2

Pumping Machine Version 3

​Unless otherwise indicated, all pictures are copyright of AMI and Oliver Archut.​

Also Read:

​U47 Rebuild

​UM57 History

TLM 49 Conversion

​TFK Steel Tubes

​BV08 Transformer

AMI Microphone Schematic Archive

​Chinese Mic Mods

V72, V76, Oahu, and TAB Logo are all Registered Trademarks of Oliver Archut, and are Licensed to TAB-Funkenwerk. All marks are filed with the US Patent and Trademark Office. BT4, BV8C, BV8R, BV47, BV314, T5, T7, T8, T11, T47, T49, T58, T60, T80 , TR22, TR42, UM351, T71, T74, V71DI, V72M, V72S, V76M, V77M, V78M, U73M, TAB-Funkenwerk and The Hydra are all Copyright 2000-2020, AM Inc. Oliver Archut is Copyright 1995-2020 by Oliver Archut. Other product names mentioned may be service marks, trademarks or registered trademarks of their respective companies and are hereby acknowledged.