Helmut, I don't want to speak for "all" technicians, but I believe a significant number of us do not use "C" as a starting point. This is due to the very error you speak of. Around 1917, International Pitch was established as "key number 49", A= 440cps. Therefore, it makes sense to use that as our starting point to maintain the integrity of (at least!) that note. As to the "standard frequency service", we also have that here in the USA. Just pick up the phone and listen to the dial tone. You will hear 440cps tone as one of the tones which make up our dial tone. One has to wonder, what is it about 440cps that's so special? :-)> Brian De Tar RPT BDeTar@aol.com
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