An overview of the product ranges by Siemens, Maihak, Telefunken, TAB, Neumann and others
A translation of my Master's Thesis, written in German some 10 years ago. Information like this is not subject to ageing, though..
Will be publishing individual sections from time to time here
An outline of the prodedures I use to track down faults in a device
The rig and the tools I use for test, repair, mods, and beyond
SERVICE & DISSECTION
This is about servicing various pieces of gear which might be of general interest. While I was at it, I included several close-up pictures, for all you nerds out there.
In case you need to get some troubleshooting basics straight, check the article about fault finding in the section above.
Includes a complete dissection of the unit
Fixing up the tone switch section
The "mother" of all German x95 EQ's… in Germanium circuitry
Passive unit, same era as V72, same pain in the ___ to work on ;-)
WARNING!
Working on electronic devices such as described on this site can involve LETHAL VOLTAGES - especially in tube amplifiers, you're dealing with up to 500 Volts. If you're not absolutely sure what you're doing, better have a qualified tech do it for you - otherwise, there's a chance you might hurt or even kill yourself. Really.
Please also read the DISCLAIMER in the CONTACT section.
