Public address system

No, you are the guy who calls the doctor from the roof of the building and asks "What should I do if I break my leg?" I am the doctor that says "Don't jump off the building, take the stairs or get a ladder."

;-)

Charlie

electronics

Oh, then you probably haven't served in the army :-)

Our drill sergeant could easily reach 90% when he was in the mood. And he usually was.

protection).

and I do

Nowadays you can even buy switchers for ham radio gear and that ought to be the most RF-noise sensitive group there ever was. It's no problem. And if it turns out to be one there's ferrite and capacitors.

I am currently testing a 70kHz several amp coil driver design. About 3ft from it the old Astor AM radio plays nice tunes.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

Both of us earned our "bones", most likely before you were even born. Both of us started as technicians then got degrees.

Both of us design/make stuff that ALWAYS works.

Not a chance. You're a dick licker. Don't go away mad, just go away.

You, on the other hand, are not only incompetent, but you're ignorant to boot.

As Charlie says, you're clearly a "Democrat" ;-)

As such you've earned a permanent "splat"... you have now ceased to exist. ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |

We right-wing conservatives go so far out of our way to be polite
that we couldn\'t possibly deign to use such words as "ignorant" or
"yellow-belly" or "wuss".  Instead, to keep everything warm and
fuzzy, we substitute the politically-correct synonyms "leftist
weenie" or "liberal" or "Democrat" ;-)

--
absorbs???

I'm just wondering why you're not using 100 volt line, and if you have done any calculation as to what spl you actually need from the system?

--
and you\'ll reap later than if you had tilled today ;)

JF

be

that

be

that

I second that. It is wise advice.

Doesn't +0200 land you in the asshole of Europe? ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 | I love to cook with wine. Sometimes I even put it in the food.

--- If you need our help with simple power supply issues, then by "designing" you must certainly mean determining which size screws to use to attach the projectors to the wall, yes?

Have you even considered the sound pressure level required to guarantee intelligibility with respect to the ambient noise level, or are you just shooting from the seat of your pants?

Methinks he's a village idiot ;-) ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 |

We right-wing conservatives go so far out of our way to be polite that we couldn't possibly deign to use such words as "ignorant" or "yellow-belly" or "wuss". Instead, to keep everything warm and fuzzy, we substitute the politically-correct synonyms "leftist weenie" or "liberal" or "Democrat" ;-)

--- Yeah, but so what, since anywhere you land in Europe is the asshole of Europe.

Here's England, refusing to jump into the pool and let the pound float with the euro, while all of Europe is trying to emulate _our_ constitution after about 400 years of telling us that we were wrong in breaking away from the Crown.

Seems like the UK wants to be the Washington DC of the United States of Europe, but they can't quite pull it off...

JF

:Nico Coesel wrote: :> Jim Thompson wrote: :> :>> On Fri, 09 Oct 2009 09:56:28 -0700, Charlie E. :>> wrote: :>>

:>>> Charlie :>> Here's how it will look... :>>

:>>

:> :> Yikes! For some reason I think this is not a trick photo... :> :> :You can tell they're not too intelligent because they're in a wading :pool on a cloudy day? : :Cheers : :Phil Hobbs

Or, perhaps they were simply demonstrating their faith that the ELCB on that circuit would protect them :-)

:On Fri, 09 Oct 2009 18:36:31 GMT, snipped-for-privacy@puntnl.niks (Nico Coesel) :wrote: : :>Andrew Edge wrote: :>

:>>On Thu, 08 Oct 2009 19:38:41 GMT, snipped-for-privacy@puntnl.niks (Nico Coesel) :>>wrote: :>>

:>>

:>>>>

:>>>>The loudspeakers each have an amplifier incorporated I repeat ... and :>>>>each one of these amplifiers absorbs 25W, though the data sheet says :>>>>the maximum value is 40W. The input voltage to each loudspeaker is 24 :>>>>to 48Vdc but looking at the loudspeakers specs I prefer using 48V as :>>>

:>>>You've got to be joking... :>>>

:>>>>I can't use a single amplifier because with the number of speakers :>>>>we're dealing with it would need more then a 1000W speaker with huge :>>>>distances involved its complicated. The source is an intercom system :>>>>so at a first estimate 0.6mm telephone wire should suffice. :>>>

:>>>Sorry, but the only way to do this right is using 100V speakers which :>>>are fed by several amplifiers at strategic places. There is no sense :>>>in designing such a system. It is already available as an off-the :>>>shelf product. Go ask at the local football stadium or an amusement :>>>park. They deal with long distances as well. Besides, I don't know if :>>>you want to design a safety critical system. I'd see if I can buy such :>>>a system so I can blame someone else if things go wrong. :>>

:>>I make a living designing these things ... so just answer my question :>

:>FYI: We are in the same business. I'm not saying the old way is the :>good way and I endorse to think about new ways of doing things instead :>of following old habbits. But in this case the 100V systems make a lot :>of sense. I'm quite sure if you do the math on a 100V system and your :>system, the 100V system will be 4 times cheaper and much more :>reliable. : : :OK I understand your reasoning ... but sorry I don't have as much time :as you people do to give explanations ... There is more fun in life :then debating on these issues ... . :But did it ever cross your mind that it is a need of the client? Did :it ever cross your minds that the Industry where these things are :going to be placed have conformity issues that only the above :mentioned Loudspeakers satisfy ... and a whole lot of other reasons :accompany my decision. : :Martin

You post under the name of Andrew Edge yet you sign as Martin. Surely, if you really worked at MSW Systems

you would have your own email address there. Incidentally, there is nothing on the MSW website that lists one of their services as "Public Address System Design". The stated main areas of services are "Systems & Networking, Web Design and Business Apllications" which says that they are merely engaged in IT design and support. This is a far cry from the engineering requirement required for a valid company experienced in PA system design. Of course, they could simply have failed to enter this function in their services lsting....

I will be querying management at MSW as to your bonafides...

It is plainly obvious to anyone who is experienced in electronics that you are not an electronics or PA engineer or anything like it. You say "you don't have as much time (as those of us who may be competent in the field) to give explanations", and that "there is more fun in life than debating on these issues".

These two statements give you away as a fraudster and would NEVER be used by someone engaged in the PA design field. In fact, they are statements more likely to come from an uneducated juvenile out to cause trouble. Anyone who was seriously involved with the design of PA systems, as you claim to be, would have at the very least, a knowledge of electronics building blocks and how to select the appropriate items for the project at hand. You plainly don't possess this knowledge otherwise you would be pleased to describe in complex detail the environment you have to work with and the specific problems which this environment might present in coming to the best solution. That is the real reason why you can't be bothered to provide explanations.

There are myriad problems in designing a PA system and there is no person on this earth who can supply you with the answers without ALL of the specification and details. It is a specialised field which does not really fit in with "IT Consulting".

Not only that, but email to MSW Systems bounces. And Google street view for

12506 Maverick Court, Tampa shows up as a residence in a rural suburb in the sticks. Hardly the sort of address one would aspire to for an IT consultancy with the claims made in the website below. Smells very fishy to me....

: :You post under the name of Andrew Edge yet you sign as Martin. Surely, if you :really worked at MSW Systems

you would have your :own email address there. Incidentally, there is nothing on the MSW website that :lists one of their services as "Public Address System Design". The stated main :areas of services are "Systems & Networking, Web Design and Business :Apllications" which says that they are merely engaged in IT design and support. :This is a far cry from the engineering requirement required for a valid company :experienced in PA system design. Of course, they could simply have failed to :enter this function in their services lsting.... : :I will be querying management at MSW as to your bonafides... : :It is plainly obvious to anyone who is experienced in electronics that you are :not an electronics or PA engineer or anything like it. You say "you don't have :as much time (as those of us who may be competent in the field) to give :explanations", and that "there is more fun in life than debating on these :issues". : :These two statements give you away as a fraudster and would NEVER be used by :someone engaged in the PA design field. In fact, they are statements more likely :to come from an uneducated juvenile out to cause trouble. Anyone who was :seriously involved with the design of PA systems, as you claim to be, would have :at the very least, a knowledge of electronics building blocks and how to select :the appropriate items for the project at hand. You plainly don't possess this :knowledge otherwise you would be pleased to describe in complex detail the :environment you have to work with and the specific problems which this :environment might present in coming to the best solution. That is the real :reason why you can't be bothered to provide explanations. : :There are myriad problems in designing a PA system and there is no person on :this earth who can supply you with the answers without ALL of the specification :and details. It is a specialised field which does not really fit in with "IT :Consulting".

THe church my wife went to in VT had five services, three of them in a

500 seat theater down the street (with open concessions stand). They pretty much filled them all. Amazing.

And here I thought Slowman was the asshole of Europe.

400? Well...

And then we have Washington DC wanting us to be Europe, and may yet pull it off.

Debating issues is one of the most important things a designer does. It helps to avoid re-inventing the wheel by sharing knowledge and insights.

Perhaps. But in some cases a potential client wants a solution that is prone to problems. Try asking them how many companies they turned down because those companies didn't want to supply the solution the client

*thinks* is best for them. 100V speakers come in many shapes and sizes. It is impossible a 100V system cannot meet any conformance requirement either related to safety, enviroment or esthetics.

For example this is a speaker that may be used in hazardous environments:

This is the webshop from the manufacturer:

It is in German, just click around a bit to see what they have. Perhaps they have a distributor or give them a call. A lot of Germans know how to speak English these days.

--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
                     "If it doesn\'t fit, use a bigger hammer!"
--------------------------------------------------------------

According to Andrew's IP address he is in Cagliari, Italy.

--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
                     "If it doesn\'t fit, use a bigger hammer!"
--------------------------------------------------------------

You then say to the doctor "Of course, I am a very experienced doctor myself; but I didn't tell you anything about the way my leg was broken, so you don't know that there are complications".

Now what does the doctor think of you?

--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk