To replace a wire which broke in the swivel
of the boom, I reconstructed the boom of an
Altec Lansing headset. This included
resoldering the wires to the back of the
electret capsule. The speakers still work
but the mic does not after this repair.

Found a similar failure after soldering a
new electret onto the wires of an inexpensive
Creative/Telex desktop mic.

Is the electret mic particularly heat sensitive?
If so, what technique is recommended? Already
I was careful to apply minimal heating.

Thanks, ... Peter Easthope