Neumann Vintage U87 Clone : Build Thread.

[joulupukki]

The easiest way is to draw the changes on the D-87 diagram (delete unnecessary components, parts and connections to transform into ORS87)

Should I reference this as the components that would remain in the circuit?

 

[micolas]

Should I reference this as the components that would remain in the circuit?

Logically you should print the schematics of D-87 and ORS87 and put them side by side and analyze the differences, it was stated that ORS87 is a vintage U87 (so D-87) "stripped" of the option to change the polar patterns, of hi -pass and sensitivity reduction pad.
After drawing the changes, then you can easily modify the build. Otherwise it can become a too abstract, mental process for someone who doesn't have much experience.

 

[micolas]

@joulupukki
Do you have the schematic of the D-87?
I put here the scheme of ORS87, (probably with 24v and 33v Zener)

 

[micolas]

@joulupukki
However, I think it would be more correct to start a separate thread called, for example:
"How to convert D-87 to ORS87"
Thus, anyone who built D-87 can help you and increase your chances of success.
Also we must not pollute this thread.