Combined signal and power cables

Combined signal and power cables

Combined signal and power cables “Why are the lighting ones and sound ones different” Well one thing to point out is that dmx uses rs485 and the physical layer of  RS 485 requires a  cable with a characteristic impedance of 120 ohms This prevents unwanted reflections...
Sound system Problems ? give me a call

Sound system Problems ? give me a call

Sound system problems . On the Monday morning I had an email from the a church. Hi John, I just thought I would pass on to you the very positive comments I received from the congregation on the quality of the sound at this mornings service. I did a couple of very...
Radio Microphones licencing

Radio Microphones licencing

Radio Microphones licencing In the UK there are particular frequencies and frequency ranges that can be used for radio microphones being used for Program Making And Special Events I have trawled the Ofcom website to get an overview of the situation: The PMSE Spectrum...
When customers bother to comment

When customers bother to comment

Its great when customers bother to comment on the service they have recieved Here are the latest  two Sarah Swarbrick , the drama teacher from St Edmunds in Portsmouth writes Hi John, Just wanted to say a massive thank you for today. We were so impressed with...