<div id="RTEContent">Yes (you are wrong on this :^)<br> <br> The problem is two-fold.<br> <br> 1) The transformer magnetic field is coupled to the steel, causing a<br> induced vibration<br> <br> 2) The transformer core itself is magentostrictive (well they ALL are but this<br> one is worse than most)... so the core itself will buzz anyway<br> <br> The fixes might be<br> <br> 1) Aluminum top and bottom<br> <br> 2) High quality Toroid transformer<br> <br> 3) External power supply retrofit (wall wart anyone)<br> <br> (or 4... just kick back and BITCH about it... :^)<br> <br> H^) harry<br><br><b><i>Tim Parkhurst <tim.parkhurst@gmail.com></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> <div><span class="gmail_quote">On 1/16/06, <b class="gmail_sendername"><a href="mailto:WeAreAs1@aol.com">WeAreAs1@aol.com</a></b> <<a href="mailto:WeAreAs1@aol.com">WeAreAs1@aol.com</a>>
wrote:</span> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"><font face="arial,helvetica"><span class="q"><font color="#000000" face="Geneva" size="2"><br>In a message dated 1/16/06 10:00:15 AM, <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:seb@burnit.co.uk" target="_blank">seb@burnit.co.uk</a> writes:<br><br><br> <blockquote style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px; margin-left: 5px; margin-right: 0px;" type="CITE"></blockquote></font><font color="#000000" face="Geneva" size="2">Your Matrix 1000 has a fan?<br>Or do you just not like the sound coming from the audio out socket? :) <br></font></span><font color="#000000" face="Geneva" size="2"><br><br>Matrix 1000's (pretty much all of them) make an annoying mechanical noise. It's the power transformer, vibrating at 60/120/180/240/etc. Hz, mechanically coupled to the metal case, using !
it as a
resonating box. Nice design, Oberheim. <br><br>Mike B.</font><font color="#000000" face="Geneva" size="2"></font> </font></blockquote></div> <div><br>I would think it would be pretty simple to mount the transformer on some rubber pads and eliminate the problem altogether. A seperate grounding wire could be added if necessary. Am I wrong on this?<br> </div> <div><br clear="all">Tim (wrong once or twice in the last decade) Servo<br>-- <br>"Imagination is more important than knowledge." - Albert Einstein </div> </blockquote><br></div>