Schematics include AKG,  B&O,  Electro-Voice,  Fairchild,  Grampian,  Geloso,  Gefell,  Hammond,  Lomo,  Neumann,  Oktava , RFT , Reissmann,  Recard,  Schoeps,  Syncron,  Sony, Teladi,  Thiele , Wetzel.

For higher resolution, double click the schematic and then click on the download button. These schematics are provided for the servicing and DIY communities, with the aim of helping to keep older equipment working. Please note that some of these have been donated, or traced out from hardware, and may be incomplete or contain errors. In other words please check against what you see in front of you!