Cut-Throat Posted November 25, 2008 Share Posted November 25, 2008 I have finished my new crossovers with help from forum member ClaudeJ1 - Thanks for your help! . I have the formulas correct now for 400 hz and 6000 hz. crossover points. I mounted them on Purple Heart wood Bases with a Briwax finish. I used Clarity Caps and Solen Litz inductors. The Banana Plugs allow me to switch amps quickly as I have multiple speaker wire runs to various amps. My crossovers sit on top of the Khorn Bass Bins, so I thought I'd make them look somewhat nice also! Quote Link to comment Share on other sites More sharing options...
Mike Dubay Posted November 25, 2008 Share Posted November 25, 2008 CT Very slick job on the cross overs! Nice idea to use the solder lugs to make a solder connection and affix to a non insulator. It gives you a test point also to boot. Sweet. I'm considering doing a pair of corn scalas next year, based of some of the builds I have seen on the forums. I'm still in the process of learning how to use the audio transformers shown. I have built several speakers with cap/choke x-overs. What drivers did you use? Quote Link to comment Share on other sites More sharing options...
Marvel Posted November 25, 2008 Share Posted November 25, 2008 Sweet! Those look nicer that the ones I made for my LS, but they are hidden in the back. Did you need to use the Litz on the bass inductor? I didn't thinkit was necessary. Bruce Quote Link to comment Share on other sites More sharing options...
runninshine Posted November 25, 2008 Share Posted November 25, 2008 CT Looks great! I need to sit down soon and try to build a pair. Anyways an attaboy is well deserved. Keep it loud! Quote Link to comment Share on other sites More sharing options...
soundbound Posted November 25, 2008 Share Posted November 25, 2008 Beautiful! [Y] Quote Link to comment Share on other sites More sharing options...
Groomlakearea51 Posted November 26, 2008 Share Posted November 26, 2008 Those are beautiful. Great idea on the 'nanna connectors!!! I started doing that about a year ago and it's been well worth the effort. It saves a ton of time when switching amps, etc. Quote Link to comment Share on other sites More sharing options...
DoubleJ Posted November 26, 2008 Share Posted November 26, 2008 Nice work Kevin!!! Looks like you have been finding ways to occupy your time between Fly Fishing trips. JJ Quote Link to comment Share on other sites More sharing options...
kaiser SET say Posted November 26, 2008 Share Posted November 26, 2008 Nice job Cut, purple heart is a beautiful wood for sure. I had a custom made audio rack in the late 80's that I had all purple heart shelves in[] Quote Link to comment Share on other sites More sharing options...
BEC Posted November 26, 2008 Share Posted November 26, 2008 I have finished my new crossovers with help from forum member ClaudeJ1 - Thanks for your help! . I have the formulas correct now for 400 hz and 6000 hz. crossover points. I mounted them on Purple Heart wood Bases with a Briwax finish. I used Clarity Caps and Solen Litz inductors. The Banana Plugs allow me to switch amps quickly as I have multiple speaker wire runs to various amps. My crossovers sit on top of the Khorn Bass Bins, so I thought I'd make them look somewhat nice also! I have some concern about how close one inductor is to the autotransformer. Bob Crites Quote Link to comment Share on other sites More sharing options...
Deang Posted November 26, 2008 Share Posted November 26, 2008 I just have concern. Quote Link to comment Share on other sites More sharing options...
Cut-Throat Posted November 26, 2008 Author Share Posted November 26, 2008 I have some concern about how close one inductor is to the autotransformer.Bob Crites I studied this a bit, and did some research. The 'experts' recommend 3 inches of distance, but if that cannot be accomodated that if they are at 90 degree angles to one another, and you cannot see the other inductor thru the 'donut hole' that you are OK. Anyway, it sounds better than any crossover that I've had hooked up to my Khorns.This illustrates inductor placement. Mine is placed like Figure #7, Which is still acceptable the way the inductor windings are. Quote Link to comment Share on other sites More sharing options...
BEC Posted November 26, 2008 Share Posted November 26, 2008 Most instructions I have seen on the net seem to concentrate preventing inductor coupling. They seem to ignore the effect of metal near air core inductors. Here is a picture of a test of a 2.5 mH inductor on my workbench. Notice that it is pretty good with the error being just about 1 percent. Bob Crites Quote Link to comment Share on other sites More sharing options...
BEC Posted November 26, 2008 Share Posted November 26, 2008 Same test about 10 seconds later. Now the error is over 2 percent. Anyone notice what caused increase in the error. Bob Quote Link to comment Share on other sites More sharing options...
Marvel Posted November 26, 2008 Share Posted November 26, 2008 I'll bite... The single screw over which the coil is placed? A steel screw, too, I imagine. Screwed into the bench as well? Bruce Quote Link to comment Share on other sites More sharing options...
BEC Posted November 26, 2008 Share Posted November 26, 2008 Yep, give Bruce a virtual prize. The little screw is doing that. It is actually sunk below the surface of the table top and still it effects the inductor. First time I noticed this happening was from a screw that was into the bottom of my workbench that did not even penetrate the surface. Just noticed that inductors tested funny when I tested them on a certain spot on the workbench. The closer to the core of the air core inductor the metal is, the more the effect. Some effect is noted even with the metal outside. Bob Quote Link to comment Share on other sites More sharing options...
Cut-Throat Posted November 26, 2008 Author Share Posted November 26, 2008 Well, that may well work in my favor as the correct inductor value was not available from Solen. I had to buy an inductor that was about .15 off from the correct forumla. Maybe I'll measure the inductor and start putting in screws to get it to within a few Hundreths of a Mili Henry of the correct value[] Quote Link to comment Share on other sites More sharing options...
BLSamuel Posted November 27, 2008 Share Posted November 27, 2008 Trey tested a crossover at a Pilgrimage.... identified who it was put together by as the assembler had often or maybe consistently used steel screws in place of the nylon that was supposed to be used to hold the inductor in place - had a cap I think - and plotted each curve - there was a noticable difference in the curves - hard telling how big a difference in the sound but it clearly tested different. Quote Link to comment Share on other sites More sharing options...
DU73 Posted November 27, 2008 Share Posted November 27, 2008 very nice and clean. great job. Quote Link to comment Share on other sites More sharing options...
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