Guest ed426 Posted July 13, 2006 Report Share Posted July 13, 2006 Hi Guys,I am attempting a LST project and need some information. Does anyone have a set of corssovers they want to part with? Or, does anyone have the specs on that auto transformer in the corssover to make one? I can figure the rest of the crossover but that transformer has got me.Any help please, thanks. Ed Link to comment Share on other sites More sharing options...
dynaco_dan Posted July 13, 2006 Report Share Posted July 13, 2006 Hi Ed;I just read your goal to create LST's.This topic will draw members, like bees to honey.A very big and wonderful project, and a real labour of love.Are you going to try to make the enclosures to match original LST's/Cello's?What brand and model of drivers are you contemplating using?A little idea that I have, would be, tri-amping with an electronic crossover, eliminate all of the filter caps, resistor, switch, and auto-transformer.Each set of drivers could have it's properly matched and sized fuse even.Good luck and I will definitely be following your progress with this topic. Link to comment Share on other sites More sharing options...
roundhome Posted July 14, 2006 Report Share Posted July 14, 2006 >Hi Guys,>>I am attempting a LST project and need some information. >>Does anyone have a set of corssovers they want to part with? >Or, does anyone have the specs on that auto transformer in the>corssover to make one? I can figure the rest of the crossover>but that transformer has got me.>>Any help please, thanks. EdHello Mr Kantor offered to do the specs if some one would send him a crossover I have one out of my LST right now and would be happy to send it down to him If, He still is willing to do this. I know he does not have a lot of spair time so we need to ask him first.Jim Link to comment Share on other sites More sharing options...
Guest ed426 Posted July 14, 2006 Report Share Posted July 14, 2006 Thanks for the reply Vern,.I have been going back and fourth with the idea of building a set of LSTs for the last 5 years. I was in the club 4 years ago attempting to get some information. http://www.classicspeakerpages.net/dc/dcbo...ing_type=searchAnd since then I have only been able to pick up an old set of 3as and electronically restore them.My thought has been to build a set like the Cello's with flush mounted drivers like the 303s. The flush mount has an advantage and would be an easier cabinet to build. I am an armature woodworker and think I can build cabinets for flush mount drivers. But, it depends on which drivers I use. I have a set of 3as and a set of ar5s which gives me enough drivers to do one LST. If I use these drivers flush mounted with no grills it would look like hell. I also have a set of 303s and two extra tweeters which would look fine flush mounted. The problem is which type of drivers, old or new, can I find to fill the quota. You can always find the old style on ebay but the new style is scarce and expensive. If I find enough of the old style, I’ll need to go with the recessed cabinet style which is more work.The major deciding part is the crossover. And unless I find a set first, there is no need to go further with this project. The transformer is where I stop at. The other components can be found but not that transformer. I can wind a air core coil and would attempt to build this one but, need some specs. So, that is where I am, toying with the idea of the build depending on what I find.Ed Link to comment Share on other sites More sharing options...
Guest ed426 Posted July 14, 2006 Report Share Posted July 14, 2006 Thanks for the offer. This may be a start. It depends on how busy he is like you said. I'll see if he is up to it.Ed Link to comment Share on other sites More sharing options...
dynaco_dan Posted July 14, 2006 Report Share Posted July 14, 2006 >Thanks for the reply Vern,.>>I have been going back and fourth with the idea of building a>set of LSTs for the last 5 years. I was in the club 4 years>ago attempting to get some information. >http://www.classicspeakerpages.net/dc/dcbo...ing_type=search>And since then I have only been able to pick up an old set of>3as and electronically restore them.>>My thought has been to build a set like the Cello's with flush>mounted drivers like the 303s. The flush mount has an>advantage and would be an easier cabinet to build. >>I am an armature woodworker and think I can build cabinets for>flush mount drivers. But, it depends on which drivers I use. >I have a set of 3as and a set of ar5s which gives me enough>drivers to do one LST. If I use these drivers flush mounted>with no grills it would look like hell. I also have a set of>303s and two extra tweeters which would look fine flush>mounted. The problem is which type of drivers, old or new,>can I find to fill the quota. You can always find the old>style on ebay but the new style is scarce and expensive. If I>find enough of the old style, I’ll need to go with the>recessed cabinet style which is more work.>>The major deciding part is the crossover. And unless I find a>set first, there is no need to go further with this project. >The transformer is where I stop at. The other components can>be found but not that transformer. I can wind a air core coil>and would attempt to build this one but, need some specs. >>So, that is where I am, toying with the idea of the build>depending on what I find.>>Ed>Hi Ed;Welcome back to this site.I admire you for contemplating even making a pair ( or more ) of AR-LST's.Assembling the cabinet, may be the least amount of your work.You may wish to re-consider which drivers you do use though.If you want to re-crete an exact replica of the LST's, then you would need to use original ( old ) drivers, bought off ebay or robbing old AR-3A's, etc..I have read here that the foam under the 3/4" domes deteriorates, the same as the foam surrounds.I can't, for the life of me, remember what happens to the tweeters when it does deteriorate.There is always a few tweeters, mids and woofers on ebay at any one time.They are becoming scarcer all the time, which means the prices will also climb higher.Perhaps in the scheme of things, you should research newly manufactured tweeters, mids and woofers.Some newer woofers use a neoprene/rubber type surround material, no rot.The cost of original old used AR drivers could now be about, 2 woofers $40 - $100.00 each, 8 mids $35.00 each and 8 tweeters $30.00 each.Just briefly, for the drivers only, we would be looking at about $800.00 plus.The crossovers, if you are going the 5 position switch route and auto-transformer with caps will probably run you around $200 - 300.00, a guess on my part, plus your enclosure materials and of course your labour of love.The price on ebay for a pair of LST's run the gamut, from $500.00 - $2500.00 a pair, probably averaging $1500.00+ a pair. These prices are average, but usually there is a buying frenzy and the do climb at times.Caution must be used, some sellers claim that their AR-2AX and AR-5 3/4" tweeters, which look identical but measure differently, will work, they will not.One of course could use the older Alnico woofers, with the clothe surrounds as an option.MDF cabinets are a lot more solid and with the internal bracing, the enclosure should have a little less resonance.There was two Cello enclosures only, for sale on ebay a few months ago, they looked really nice.In practice, I don't know of anyone that could have 9 exposed drivers, without grille cloths, displaying in their living room.Little kids are not the only problem, big kids fingers are drawn to touching the domes, just like bees to honey.Next time you go to a stereo store, look at all the pushed in domes.I hope you continue to write your thoughts and progress, Ed.Good luck. Link to comment Share on other sites More sharing options...
Guest ed426 Posted July 20, 2006 Report Share Posted July 20, 2006 >>Thanks for the reply Vern,.>>>>I have been going back and fourth with the idea of>building a>>set of LSTs for the last 5 years. I was in the club 4>years>>ago attempting to get some information. >>http://www.classicspeakerpages.net/dc/dcbo...ing_type=search>>And since then I have only been able to pick up an old set>of>>3as and electronically restore them.>>>>My thought has been to build a set like the Cello's with>flush>>mounted drivers like the 303s. The flush mount has an>>advantage and would be an easier cabinet to build. >>>>I am an armature woodworker and think I can build cabinets>for>>flush mount drivers. But, it depends on which drivers I>use. >>I have a set of 3as and a set of ar5s which gives me>enough>>drivers to do one LST. If I use these drivers flush>mounted>>with no grills it would look like hell. I also have a set>of>>303s and two extra tweeters which would look fine flush>>mounted. The problem is which type of drivers, old or>new,>>can I find to fill the quota. You can always find the>old>>style on ebay but the new style is scarce and expensive. >If I>>find enough of the old style, I’ll need to go with the>>recessed cabinet style which is more work.>>>>The major deciding part is the crossover. And unless I>find a>>set first, there is no need to go further with this>project. >>The transformer is where I stop at. The other components>can>>be found but not that transformer. I can wind a air core>coil>>and would attempt to build this one but, need some specs. >>>>>So, that is where I am, toying with the idea of the build>>depending on what I find.>>>>Ed>>>>Hi Ed;>>Welcome back to this site.>>I admire you for contemplating even making a pair ( or more )>of AR-LST's.>>Assembling the cabinet, may be the least amount of your work.>>You may wish to re-consider which drivers you do use though.>>If you want to re-crete an exact replica of the LST's, then>you would need to use original ( old ) drivers, bought off>ebay or robbing old AR-3A's, etc..>>I have read here that the foam under the 3/4" domes>deteriorates, the same as the foam surrounds.>>I can't, for the life of me, remember what happens to the>tweeters when it does deteriorate.>>There is always a few tweeters, mids and woofers on ebay at>any one time.>>They are becoming scarcer all the time, which means the prices>will also climb higher.>>Perhaps in the scheme of things, you should research newly>manufactured tweeters, mids and woofers.>>Some newer woofers use a neoprene/rubber type surround>material, no rot.>>The cost of original old used AR drivers could now be about, 2>woofers $40 - $100.00 each, 8 mids $35.00 each and 8 tweeters>$30.00 each.>>Just briefly, for the drivers only, we would be looking at>about $800.00 plus.>>The crossovers, if you are going the 5 position switch route>and auto-transformer with caps will probably run you around>$200 - 300.00, a guess on my part, plus your enclosure>materials and of course your labour of love.>>The price on ebay for a pair of LST's run the gamut, from>$500.00 - $2500.00 a pair, probably averaging $1500.00+ a>pair. >>These prices are average, but usually there is a buying frenzy>and the do climb at times.>>Caution must be used, some sellers claim that their AR-2AX and>AR-5 3/4" tweeters, which look identical but measure>differently, will work, they will not.>>One of course could use the older Alnico woofers, with the>clothe surrounds as an option.>>MDF cabinets are a lot more solid and with the internal>bracing, the enclosure should have a little less resonance.>>There was two Cello enclosures only, for sale on ebay a few>months ago, they looked really nice.>>In practice, I don't know of anyone that could have 9 exposed>drivers, without grille cloths, displaying in their living>room.>>Little kids are not the only problem, big kids fingers are>drawn to touching the domes, just like bees to honey.>>Next time you go to a stereo store, look at all the pushed in>domes.>>I hope you continue to write your thoughts and progress, Ed.>>Good luck. Vern,I know that nothing lasts forever but, I never heard of the 3/4" domes deteriorating. Do the 1 1/2 domes have the same problem? Has anyone out there had a driver that went bad, other than overdriving, that could tell us the tell-tail-signs. Link to comment Share on other sites More sharing options...
dynaco_dan Posted July 20, 2006 Report Share Posted July 20, 2006 >Ed.>>>>Good luck. >>Vern,>>I know that nothing lasts forever but, I never heard of the>3/4" domes deteriorating. Do the 1 1/2 domes have the>same problem? Has anyone out there had a driver that went>bad, other than overdriving, that could tell us the>tell-tail-signs.Hi Ed;It has been written here, that the foam was used under the dome, instead of fibreglas, the 3/4" domes does output ? deteriorates.As I mentioned earlier, I do not remember what happens to the tweeter when it does.I will assume it stops working or chirps or tweets?Another temptation might be to remove the screens from the mid-range drivers, to open up the sound.That would also be a bad move, the fibreglas external ring in the wire screen applies slight pressure on the mid's dome, to compensate for the fibreglas's pressure inside pushing on the dome. Link to comment Share on other sites More sharing options...
Guest avguytx Posted July 20, 2006 Report Share Posted July 20, 2006 I saw a pair of LST-2's on Ebay just today. Here's a link. Ok, for an A/R newbie, what do the LST's look like in comparison?Kiphttp://cgi.ebay.com/AR-Acoustic-Research-L...1QQcmdZViewItem Link to comment Share on other sites More sharing options...
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