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Junior Varsity
HF Diaphragm Question
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<blockquote data-quote="Ivan Beaver" data-source="post: 63866" data-attributes="member: 30"><p>Re: HF Diaphragm Question</p><p></p><p>The "quick and dirty" method is to apply a sinewave-say in the range to 500-800Hz-but don't make it to loud. Install the diaphragm with screws almost tightened all the way.</p><p></p><p>Now "slide" it to one side. You may hear a buzz come up-which is a harmonic due to the rubbing.</p><p></p><p>Depending on how much "slack" you have-you may be able to move it around a bit or not. Figure out how much "elbow room" you have. Figure out where the diaphragm is in the middle of the buzzes and tighten it down.</p><p></p><p>Then sweep the freq around (using mostly lower freq tones that cause the diaphragm to move more) and see if you hear any harmonics "pop up".</p><p></p><p>Some times you get lucky when you just "put them in". Other times not so lucky.</p><p></p><p>Some are easier than others. The factory and good after market units (Radian for example) tend to be easier to align. I ahve tried (years ago) several of the "imports" and had a very hard time getting them lined up-and then they still did not work (or last) as good as the better units.</p></blockquote><p></p>
[QUOTE="Ivan Beaver, post: 63866, member: 30"] Re: HF Diaphragm Question The "quick and dirty" method is to apply a sinewave-say in the range to 500-800Hz-but don't make it to loud. Install the diaphragm with screws almost tightened all the way. Now "slide" it to one side. You may hear a buzz come up-which is a harmonic due to the rubbing. Depending on how much "slack" you have-you may be able to move it around a bit or not. Figure out how much "elbow room" you have. Figure out where the diaphragm is in the middle of the buzzes and tighten it down. Then sweep the freq around (using mostly lower freq tones that cause the diaphragm to move more) and see if you hear any harmonics "pop up". Some times you get lucky when you just "put them in". Other times not so lucky. Some are easier than others. The factory and good after market units (Radian for example) tend to be easier to align. I ahve tried (years ago) several of the "imports" and had a very hard time getting them lined up-and then they still did not work (or last) as good as the better units. [/QUOTE]
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