At first, we thought it must be a problem with the microphone itself or the cable we were using to connect it. But replacing both the mic and the cable was not enough to solve the problem.
Now, we think there must be a loose connection within the PA system itself. Unfortunately, the system is just out of warranty. But maybe there is somebody in our school community who knows enough about electronics to take a look and hopefully sort this out?
If you think you might be able to help us get to the bottom of this problem, please drop in to Nicola in the office, or drop us an email to let us know, and we can arrange to let you have a look at it.