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Homebuilt tube amp
Hi, I'd like to know if, in order to obtain CE-Marking of a homebuilt
tube guitar amp, it is necessary, ALSO for Output Transformer and Chokes, to satisy EN-61558. Which are the rules, for Output Transformers ? They must be CE-marked ? Thank you very much in advance Matteo |
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#3
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#6
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On 15 Feb 2005 00:25:49 -0800, (Matteo)
wrote: Mike T. wrote in message . .. On 14 Feb 2005 04:41:37 -0800, (Matteo) wrote: Hi, I'd like to know if, in order to obtain CE-Marking of a homebuilt tube guitar amp, it is necessary, ALSO for Output Transformer and Chokes, to satisy EN-61558. Which are the rules, for Output Transformers ? They must be CE-marked ? Thank you very much in advance Matteo If I recall correctly, it's a complex process to get CE approval for a device connected to the AC line. You first have to use approved components in any portions of the circuit connected to AC, and follow many (mostly sensible) safety rules in the design and manufacture. Then you send a couple of prototypes to a qualified testing lab. One will probably be destroyed in testing. They will give you a report on which standards it is required to meet, which standards it meets, and where it fails. You make a few changes, then submit another prototype. Finally, they say it meets all applicable CE requirements. Then you submit the report to ... I forget who ... for the actual CE approval. Usually it is best to hire an engineer who has experience in piloting products through the approvals process. How many do you plan to build? Do you really need a CE approval, or do you just want to build it to CE standards? Mike T. Thank you for your answers; I plan to build few amplifiers, about (max.) 10 each year). For friends, etc... So I'd like them to be CE compliant. But I don't know if, for those numbers, I is worth to submit them to CE approval. In any case, I will surely build them as much CE compliant as I can; in the future, I'll see if submit it to CE approval. From what I understand, being CE compliant for someone building in small quantities is not practical, way too expensive. Al |
#7
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While the CE certification process is prohibitively expensive for such
exercises, if you don't ensure that your mains wiring complies with the "low voltage directive", you are at greater risk if something does go wrong. And you should also use the appropriate shielding and earthing techniques to achieve some immunity to RFI ("immunity"). On 15 Feb 2005 08:52:07 -0500, (Mike Rivers) wrote: In article writes: I plan to build few amplifiers, about (max.) 10 each year). For friends, etc... So I'd like them to be CE compliant. But I don't know if, for those numbers, I is worth to submit them to CE approval. Definitely not, unless you're planning to sell them for several thousand dollars each. CE certification is very expensive. Even if you do all the work yourself, it still must be done by a certified lab and that costs a lot. Tony (remove the "_" to reply by email) |
#8
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Depending on the specifics and the lab, you can plan on $6K to $10K to get a
CE certification. If you do not pass, you will need to fix the problem and try again but just the tests that you failed. With a tube amp (no clocks) some of the tests will be easy to pass (like emissions and ESD). John "Matteo" wrote in message om... Mike T. wrote in message . .. On 14 Feb 2005 04:41:37 -0800, (Matteo) wrote: Hi, I'd like to know if, in order to obtain CE-Marking of a homebuilt tube guitar amp, it is necessary, ALSO for Output Transformer and Chokes, to satisy EN-61558. Which are the rules, for Output Transformers ? They must be CE-marked ? Thank you very much in advance Matteo If I recall correctly, it's a complex process to get CE approval for a device connected to the AC line. You first have to use approved components in any portions of the circuit connected to AC, and follow many (mostly sensible) safety rules in the design and manufacture. Then you send a couple of prototypes to a qualified testing lab. One will probably be destroyed in testing. They will give you a report on which standards it is required to meet, which standards it meets, and where it fails. You make a few changes, then submit another prototype. Finally, they say it meets all applicable CE requirements. Then you submit the report to ... I forget who ... for the actual CE approval. Usually it is best to hire an engineer who has experience in piloting products through the approvals process. How many do you plan to build? Do you really need a CE approval, or do you just want to build it to CE standards? Mike T. Thank you for your answers; I plan to build few amplifiers, about (max.) 10 each year). For friends, etc... So I'd like them to be CE compliant. But I don't know if, for those numbers, I is worth to submit them to CE approval. In any case, I will surely build them as much CE compliant as I can; in the future, I'll see if submit it to CE approval. Thank you Matteo |
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