The crystal element has deteriorated with age to the point where it became unserviceable. Due to the fact that these have not been in production for many years, sourcing a genuine replacement has now become an almost impossible task.
To overcome this problem a Heil HC-4 microphone insert has been installed in the Silver Eagle’s head.
The internal wiring in the base has been modified to bypass the pre-amp as this is no longer required. This particular mike is more of a show piece than a mike which is used on a regular basis.