I have in my workshop a vintage Neumann U67 microphone with a rustling problem when rocking the microphone front and back.
If i rock the microphone side to side the rustling is much fainter.
I have cleaned the contacts for the headbasket and the mating socket contact on the microphone body and then tighten the sockets.
Also cleaned the tube socket and the contact pins on the connector on the bottom of the microphone.
Then i swapped the EF86 tube and i thought the rustling problem dissapperd with the new tube.
Then i put back the clients Telefunken EF86 tube and the rustling is now gone...
I also cleaned the edges of the shell on the microphone to increase the contact when the bottom ring is screwed on.
The threads in the bottom ring was cleaned and the also the outer threads on the microphone was cleaned to increase good contact.
Please forgive my long text about this rustling problem.
I have one question, is the high resistance resistors under the plastic lid soldered in or are the just socketed.
The plastic lid seems to be glued att one point (yellow arrow on picture) on the lid so i haven´t been able to check if the resistors and capacitors are mounted in sockets or if the are solderd in.
Björn Andersson
www.bamusik.se
