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Portable appliance testing.

Portable appliance testing.

Portable appliance testing. HSE PAT - Portable appliance testing FAQs http://www.hse.gov.uk/electricity/faq-portable-appliance-testing.htm I think this will be helpful for you to understand the legal position with regards to Portable appliance testing. in particular...

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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...

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PMSE Shared user frequencies additional band

PMSE Shared user frequencies additional band

PMSE shared user frequencies There has recently been an addition to the  PMSE shared user frequencies. These  were previously restricted  to the channel 38 band. The new band of frequencies are between  823 and 832 MHz. These  are now under the same licence as the...

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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...

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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...

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Radio microphones Keep it legal

Radio microphones Keep it legal

Radio microphone licences and you I was providing the Pa and Plasma screens for the speeches and the best mans presentation at a wedding last weekend. This involved the usual small compact speakers on stands, a hand held radio mike for the father of the bride and...

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Using LED par cans

Using LED par cans

At first sight  using LED par cans and Tri Colour colour mixing seem like the ultimate solution. Any colour from any lantern . No more changing gels. Less space on the rig.... Apart from the obvious one that "LED par cans do not produce anything  with a wave...

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Correct signal interconnection wiring

Correct signal interconnection wiring

it will save you a lot of time and problems  Signal connections at the desk end 1. The multicore provides connection between the stage and the mixing desk, for both the microphones from the stage to the desk and signals back to the stage and amps from the desk. The...

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MAINS POWER, A QUICK GUIDE

MAINS POWER, A QUICK GUIDE

Mains power supply Star earthing As a general rule, all mains power for a “PA system” and any associated “back line equipment” must come from one “Star Point”to reduces the problems of earth loops. This “Star Point” should be as close as possible to the power...

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