<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor="white" lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">What Jerry said… we use a Buck-N-Boost here to check on 50hz.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">And… by the way… what the heck is with Japan’s 100v, 50hz… are they just trying to be difficult?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> Stagecraft [mailto:stagecraft-bounces@theatrical.net]
<b>On Behalf Of </b>Jerry Durand via Stagecraft<br>
<b>Sent:</b> Wednesday, February 28, 2018 6:47 PM<br>
<b>To:</b> Mt. Angel Performing Arts Center via Stagecraft <stagecraft@theatrical.net><br>
<b>Cc:</b> Jerry Durand <jdurand@interstellar.com><br>
<b>Subject:</b> Re: [SML] 60Hz gear in a 50Hz World<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Arial",sans-serif">That's about the long and short of the waveform. From the "intelligence" I've seen in dimmer designs, I bet the show on it.
<br>
<br>
Suggestion: Borrow a generator from someone that won't get TOO pissed if you mess with the throttle and turn it down to 50Hz, then you can test your dimmers.<br>
<br>
Don't forget to re-time the generator before returning it!</span><o:p></o:p></p>
<div>
<p class="MsoNormal">On 02/28/2018 03:17 PM, Mt. Angel Performing Arts Center via Stagecraft wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><br>
The answer is 'probably', based on my experiments with building DMX controlled whizbangs. Jerry probably has much more info than I.
<br>
<br>
IME a well-designed pack will determine the zero-crossing time of the power source and phase lock its internal clock so that zero-crossing interval is 256 magic units. Then the DMX sends a 0-255 number and (after maybe doing some cosine adjustment) the controller
PWMs (pulse width modulates) the output when the two match. <br>
<br>
If the dimmer pack isn't quite so smart and is designed for 60HZ only then either you won't get full brightness at 100% or fully 'out' at 0% depending on how the controller logic works.
<br>
<br>
Carla <br>
<br>
I saw a woman wearing a sweat shirt with "Guess" on it. So I said "Implants?" She hit me.
<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>Jerry Durand, Durand Interstellar, Inc.<o:p></o:p></pre>
<pre><a href="http://www.interstellar.com">www.interstellar.com</a><o:p></o:p></pre>
<pre>tel: +1 408 356-3886<o:p></o:p></pre>
<pre>@DurandInterstel<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
</div>
</body>
</html>