I never for a moment doubted the 'spread' of Ag Talk!

Without going and taking photos, I can tell you it is on 240v AC, 50 hertz, has no connected [external] speakers, and does not feed into the P.A. mixing desk.

Thanks for the help so far, I will gather the required tech info, and will be in touch.

I have a friend who is the local auto electrician, and he put me onto a commercial pressure pack - curcuit board cleaner. Will detail it when I respond further, but it is very volatile, and dries within a few seconds of application. Some time ago we removed many multi pin connectors and cleaned them with this spray - solved whatever the problem of the moment was! Also found a blown fuse in the amplifier 'box'.

Thanks again,

Aussy Harold.