Moderators Travis In Austin Posted January 25, 2023 Moderators Share Posted January 25, 2023 4 minutes ago, Edgar said: I found this: https://testbook.com/question-answer/if-a-brass-core-of-an-inductor-is-replaced-by-an-i--5eb0442cf60d5d42e6590554 Scroll down to where it says, "The type of core material:" and read the bolded text. A brass screw will actually reduce the inductance of an air core inductor. Hold the phone. I will read it, I promise. However, don’t we have 2 or 3 people measuring the inductors with brass screws and they measure what they are supposed to measure. If that’s the case isn’t it meaningless? Did Bonehead say non-magnetic stainless or brass. You all laughed when I said duct tape, I bet some of you are not laughing now. “That ‘ill be five dollars” 2 Quote Link to comment Share on other sites More sharing options...
billybob Posted January 25, 2023 Share Posted January 25, 2023 As far as color/paint, do what you like. Just remember, black, a non-primary color works best for the original. White also, grey. For any resale value. Good fortune... 1 Quote Link to comment Share on other sites More sharing options...
Quad Khorns Posted January 25, 2023 Share Posted January 25, 2023 (edited) Yep, I'd do nylon, glue, and yes duct tape before anything that conducts electricity (older versions of duct tape had some % aluminum in the composition). I assume you meant bronze coated steel, pure bronze is not magnetic. Edited January 25, 2023 by Quad Khorns 1 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted January 25, 2023 Share Posted January 25, 2023 You know, not liken to holding back a levee... Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted January 25, 2023 Moderators Share Posted January 25, 2023 1 hour ago, Quad Khorns said: I assume you meant bronze coated steel, pure bronze is not magnetic. No I meant (incorrectly) bronze, but forgot the only bronze I was familiar with had a little iron for strength. Forgot pure bronze is onlyc copper and tin, like cymbals. Bronze is highly conductive though isn’t it? Quote Link to comment Share on other sites More sharing options...
billybob Posted January 25, 2023 Share Posted January 25, 2023 IAC, would play it safe. Nylon or other non conductive material may ease your mind. Dang well hope so... Sure eases mine... finally. Quote Link to comment Share on other sites More sharing options...
Deang Posted January 25, 2023 Share Posted January 25, 2023 Are brass screws that expensive, lol. There might be something to debate about if we didn’t have a schematic telling us what the correct value is. Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted January 25, 2023 Moderators Share Posted January 25, 2023 15 minutes ago, Deang said: Are brass screws that expensive, lol. There might be something to debate about if we didn’t have a schematic telling us what the correct value is. What I mean to say is, by measure, the inductors with the brass screw measures exactly what the schematic calls for? So even though the paper says it can lower the value, it isn’t (in this situation) so test easy tonight? Quote Link to comment Share on other sites More sharing options...
Deang Posted January 25, 2023 Share Posted January 25, 2023 2 minutes ago, Travis In Austin said: …the inductors with the brass screw measures exactly what the schematic calls for? Yes. 1 Quote Link to comment Share on other sites More sharing options...
Quad Khorns Posted January 25, 2023 Share Posted January 25, 2023 9 hours ago, Travis In Austin said: Bronze is highly conductive though isn’t it? Ok yes bronze is used in many alloys as well as used in coatings. And yes very much conductive. Quote Link to comment Share on other sites More sharing options...
Deang Posted January 25, 2023 Share Posted January 25, 2023 I see an untapped market here. Modified coil via gold(en) ratio screw providing intermingled cross canceled eddy currents. 1 1 Quote Link to comment Share on other sites More sharing options...
amped Posted January 25, 2023 Share Posted January 25, 2023 @DeangBut then you're not getting the approved Klipsch sound. I recommend GEM for the genuine approved magnetic and non-magnetic screws as were installed at the factory if the 40 year old originals show signs of flux leakage and or cosmic ray damage. Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted January 26, 2023 Moderators Share Posted January 26, 2023 35 minutes ago, amped said: @DeangBut then you're not getting the approved Klipsch sound. I recommend GEM for the genuine approved magnetic and non-magnetic screws as were installed at the factory if the 40 year old originals show signs of flux leakage and or cosmic ray damage. I have a supply of OEM ones from the factory, cryogenically treated. $29.95. 1 Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted January 26, 2023 Moderators Share Posted January 26, 2023 On 1/23/2023 at 7:19 PM, Travis In Austin said: Who knows Mr. Henry's other great achievement besides discovering electromagnetic induction (hint, it's related to history and learning). Where does his portrait hang in Washington, D.C.? Nobody? Nobody knew this? Probably nobody read it because it was at the end of one of my rambles. Science, Science, Science, it’s all about the science (to a rational point then your ears need to tell you) per Richard C, Heyser, PWK, @Chief bonehead (in multiple quotes on this Forum and in classes) It’s all about the science/engineering for me, I love the history of it, with a passion. I rely on the engineers and technical experts in here to educate me on what the technical things mean in a practical way. https://siarchives.si.edu/history/joseph-henry His portrait hangs inside the original Smithsonian (the “Castle”). Quote Link to comment Share on other sites More sharing options...
Ed Wolinski Posted February 5, 2023 Author Share Posted February 5, 2023 (edited) Many thanks to all who provided input on me the new guy's requests for 6 40 some year old La Scalas. Here is the update: The 4 Non-Framed La Scalas have been cleaned, inspected, JEM recapped and painted with the recommended Dura-Tex. They have been played thru with different inductor coil mechanical fasteners. In all honesty, I believe that the stainless steel screw makes the most pleasing difference in the final product with regard to using steel, brass, nothing, a wood stick or a spot of RTV. The Dura-Tex coating I created was indeed the 'leather look". Looks great. Also sent some input info on the faux leather process back to the guy at Dura-Tex. He emailed back and thanked me for the input. Right now, I have 4 of the 6 200 watt La Scalas looking sharp and playing L O U D. Finally, I have found that all 6 of them are labeled "industrial" on the back panel. The aluminum framed pair are still undergoing restoration. Interesting side note on the AL Crossovers...Both AL crossovers were found to have one Brass and one Steel screw installed (looked like factory) when removed. Thanks again for all of your help. Edited February 5, 2023 by Ed Wolinski Underline and say thanks again. 2 Quote Link to comment Share on other sites More sharing options...
billybob Posted February 5, 2023 Share Posted February 5, 2023 Cool...got pics of the LSIs with the black leather faux...? Quote Link to comment Share on other sites More sharing options...
geoff. Posted February 5, 2023 Share Posted February 5, 2023 I'm still very interested in your thoughts on the sound of the AA vs. AL equipped La Scalas. Quote Link to comment Share on other sites More sharing options...
Ed Wolinski Posted February 6, 2023 Author Share Posted February 6, 2023 21 hours ago, billybob said: Cool...got pics of the LSIs with the black leather faux...? I will get some pics uploaded as soon as I find a way to get the Faux to show up clearly. 1 Quote Link to comment Share on other sites More sharing options...
Ed Wolinski Posted February 6, 2023 Author Share Posted February 6, 2023 20 hours ago, geoff. said: I'm still very interested in your thoughts on the sound of the AA vs. AL equipped La Scalas. Will def get back to you on this as soon as I have the AL Equipped units restored. 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted February 6, 2023 Share Posted February 6, 2023 2 minutes ago, Ed Wolinski said: I will get some pics uploaded as soon as I find a way to get the Faux to show up clearly. No biggie, just want others to see your work, eventually. Quote Link to comment Share on other sites More sharing options...
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