Richard,

I'm sorry but I feel you are twisting some of what I am saying. If you read over my last posting, I said "I think we should be more supportive in finding answers about electrical safety so the Trust can come to a more informed decision.' What I clearly meant was, the Trust should make informed decisions from advice given by all the staff involved. I believe DD is right he should be taking an active role on matters of equipment safety. It is also in my job description to advise medical staff on the safe use of electronic medical equipment. Of course with the "Agenda for Change', this may not be apart of your description.

It seems to me that DD has come on this site to try to find answers to his diathermy problem, and he feels criticized. I came on because I'm interested on the subject and you criticized me. I feel this is only going to stifle a good interchange of views. Anyone reading who may wish to add something will think twice in case their views are also jumped on. I can see you enjoy a good jousting competition, but some of us aren't here with this motive in mind.

On a more technical note it appears you have made the whole idea for beat frequencies appear more complicated that it actually is. I could dig out my old notes on frequency mixing, but I don't see the point as I don't believe two floating generators will mix frequencies, unless someone could explain otherwise. But just for the fun of it, if we take a small percentage of say 200W, how many Watts does the patient have to sustain internally at say 20 – 100 Hz to receive a macro shock?

Adrian.