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<blockquote data-quote="kristianjohnsen" data-source="post: 89439" data-attributes="member: 441">Re: Maximum analog snake length&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; You&#039;re right, it was 16,7Hz!&nbsp; And it is what they use all over Norway.&nbsp; I was taught in school that this was introduced specifically to hinder line reflections in very, very, very, very long cables.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; Edit:&nbsp; Might very well be there were some urban ledgends going around school?&nbsp; I could not find info on the line reflection topic in this article, but lots of other neat stuff!&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href="http://en.wikipedia.org/wiki/15_kV_AC_railway_electrification" target="_blank">http://en.wikipedia.org/wiki/15_kV_AC_railway_electrification</a>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; This also from the article:&nbsp; &quot;The 15 kV, 16.7 Hz <a href="http://en.wikipedia.org/wiki/Alternating_current" target="_blank">AC</a> <a href="http://en.wikipedia.org/wiki/Railway_electrification_system" target="_blank">railway electrification system</a> is used in <a href="http://en.wikipedia.org/wiki/Rail_transport_in_Germany" target="_blank">Germany</a>, <a href="http://en.wikipedia.org/wiki/Rail_transport_in_Austria" target="_blank">Austria</a>, <a href="http://en.wikipedia.org/wiki/Rail_transport_in_Switzerland" target="_blank">Switzerland</a>, <a href="http://en.wikipedia.org/wiki/Rail_transport_in_Sweden" target="_blank">Sweden</a> and <a href="http://en.wikipedia.org/wiki/Rail_transport_in_Norway" target="_blank">Norway</a>. The <a href="http://en.wikipedia.org/wiki/High_voltage" target="_blank">high voltage</a> enables high power transmission with low losses powering <a href="http://en.wikipedia.org/wiki/Traction_motor" target="_blank">traction motors</a> available since the beginning of the 20th century. Railway electrification in late 20th century tended to use <a href="http://en.wikipedia.org/wiki/25_kV_AC_railway_electrification" target="_blank">25 kV, 50 Hz AC systems</a> which has become the preferred standard for new railway electrifications but extensions of the existing 15 kV networks are not completely unlikely.Due to high conversion costs and little advantages it is unlikely that existing 15 kV, 16.7 Hz systems will be converted to 25 kV, 50 Hz.&quot;&nbsp;&nbsp; SORRY GUYS I REALLY AM TRYING BUT THIS BROWSER HAS SO MANNY CARRIAGE (NO PUN INTENDER) RETURN ISSUES IT&#039;S NOT EVEN FUNNY!</blockquote>

[QUOTE="kristianjohnsen, post: 89439, member: 441"] Re: Maximum analog snake length You're right, it was 16,7Hz! And it is what they use all over Norway. I was taught in school that this was introduced specifically to hinder line reflections in very, very, very, very long cables. Edit: Might very well be there were some urban ledgends going around school? I could not find info on the line reflection topic in this article, but lots of other neat stuff! [URL]http://en.wikipedia.org/wiki/15_kV_AC_railway_electrification[/URL] This also from the article: "The [B]15 kV, 16.7 Hz [URL="http://en.wikipedia.org/wiki/Alternating_current"]AC[/URL] [URL="http://en.wikipedia.org/wiki/Railway_electrification_system"]railway electrification system[/URL][/B] is used in [URL="http://en.wikipedia.org/wiki/Rail_transport_in_Germany"]Germany[/URL], [URL="http://en.wikipedia.org/wiki/Rail_transport_in_Austria"]Austria[/URL], [URL="http://en.wikipedia.org/wiki/Rail_transport_in_Switzerland"]Switzerland[/URL], [URL="http://en.wikipedia.org/wiki/Rail_transport_in_Sweden"]Sweden[/URL] and [URL="http://en.wikipedia.org/wiki/Rail_transport_in_Norway"]Norway[/URL]. The [URL="http://en.wikipedia.org/wiki/High_voltage"]high voltage[/URL] enables high power transmission with low losses powering [URL="http://en.wikipedia.org/wiki/Traction_motor"]traction motors[/URL] available since the beginning of the 20th century. Railway electrification in late 20th century tended to use [URL="http://en.wikipedia.org/wiki/25_kV_AC_railway_electrification"]25 kV, 50 Hz AC systems[/URL] which has become the preferred standard for new railway electrifications but extensions of the existing 15 kV networks are not completely unlikely. Due to high conversion costs and little advantages it is unlikely that existing 15 kV, 16.7 Hz systems will be converted to 25 kV, 50 Hz. " SORRY GUYS I REALLY AM TRYING BUT THIS BROWSER HAS SO MANNY CARRIAGE (NO PUN INTENDER) RETURN ISSUES IT'S NOT EVEN FUNNY! [/QUOTE]

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