capo72

Here is my completed fixture with the buck mounted in the middle. The walls around the edge of the fixture are the dimensions of the mouth of the horn plus 3/4" material thickness per side.

Next is the buck for the middle of the assembly fixture. This is simply made by laying out on plywood, the width of the horn at the mouth, the throat, and the length. In my case those numbers were all metric, but the throat is 2" and the mouth of the horn is about 12" tall by 24" wide. That determines the angle at which the bottom and top sit relative to the mouth and throat. The pieces you cut off to form that angle on the buck, must be saved to use for sanding the angle on the edges of the top and bottom.

From there I made the top and bottom plates leaving about 1/4" material so I could sand an angle on the edges to square them up to the sides.

Here is a shot of the template I made from that pattern.

Here is the completed flare. I laid out a total of about 1500 points, which was extreme overkill. I have been called fastidious, and anal before so that may explain why. If I did it again, I would cut down the points by about 2/3rds.

This shows laying out the points on graph paper. You start in a straight line and then from each point on the vertical line, you have to draw a point perpendicular to it a certain distance that is calculated on the spread sheet. This determines the flare.

I have been working on this project for about a month, and finally got them done this morning. My apologizes to George Roland for not answering his questions via e-mail. Sorry George I accidentally deleted your e-mail before I could answer it. I hope this thread will explain how to do this. A few here have done a 300 Hz version of this horn with excellent results. Jorden (jorjen) for one was inspirational to me to proceed with this project. JWCullison was working on this exact 225 Hz horn that I built, but I don't think he finished due to many irons in the fire, not to mention a new bundle of joy, and building a new home. I don't know how you do what you have done already JC This project was more difficult and time consuming than I anticipated ( aren't they always!) I learned alot of things along the way that I would do differently next time. There are lots of pics to follow and I will try to answer any questions that I can, but be warned, I am only a hobbiest wood worker and only slightly knowledgeable of the science behind the tractrix horn. Enjoy, Jeremy The 1st pic is of the printout of the tractrix horn calculator that I used to determine the flare. I found this spread sheet program on the volvotretter web site, which has alot of useful information. There were alot of points to layout, I'm sure I could have used alot less points (about 10 fold) and still been plenty accurate enough for this project.

Wow, what a price. Congrats! The used market for Blueberries has really opened up in the last year. Maybe that's why Mark has made some changes and added the remote. Jeremy

I call ..............................................................

I would hesitate to call them mint-mint with the dust caps pushed in on the passive radiators. While that posses no issue with sound, it is a major cosmetic flaw IMO. They are a good bang for your buck speaker. I recommend holding on to them and enjoying them. You can't replace them with a better speaker for what you will get out of them. Good luck, and enjoy! Jeremy

I personally like the sound of most vintage solid state on my Cornwalls. Especially Pioneer and Marantz. I used to have a Marantz 2245 and liked it. It provided a solid bottom end with my 76 Corns. I also really love my Pioneer SX-650. It's a little 35 watt powerhouse the just rocks my 88 Cornwall II's. I don't think you can go wrong with a vintage Marantz, they sound great and hold their value well. Good luck in your quest. Jeremy

Your positive outlook on youe life is inspiring. Keep up the good work, and best wishes! Jeremy

I'm building a pair of 225hz tractrix horns right now. I'm about 2/3rd's done with them. Mine are going to be pretty big. They are 2" at the throat for a JBL 2482 driver and the mouth is about 24"x12" and about 17" long. I got the formula for the flare from the volvotretter web site. He has a pretty nice spread sheet calculator to lay out a pattern for the flare. JWCullison also was building these horns. I don't know if he ever finished them. A few people on this forum have built a 300hz version. I have taken some pictures to document along the way, but I don't plan to post them until i'm finished. I think i'll be done in about a week or so. I will be happy to answer any questions that I am able to. They are many people more knowledgeable then me who hopefully will chime in later. Good luck with the project! Check this link. http://forums.klipsch.com/forums/thread/722839.aspx Jeremy

Thanx Gary, I know it's not free K-horns, but still not bad [] Yes that is my TD124. One of my many current projects is building a new heavy plinth trimmed in dovetailed mahogany to match my BBX. I also am cleaning up an SME 3009 so I can completely overhaul the TD124. No idea on a cart yet though. I followed along your TD124 experience and am glad you are happy with it. Jeremy

Their new home, at least temporarily!

The other tag

The tag

The price tag!

Well persistance has finally paid off. From the Sheltie Dave school of finding deals, the theory of "you have to beat the path to find the deals" has come to fruition. I have spent lots of time looking for gear at garage sales and auctions, only to find junk or nothing at all. After spending the last 3 days driving past a garage sale sign at the end of my subdivision I decided to go check it out. It was about 3 blocks down at the other end of my road. I walked up to the garage and was attracted to a large highboy secretary along the wall, past that was a dresser, and past that some large speakers. My 1st thought was "those are too big to be Cornwalls", but as I approached I saw the Klipsch logo on the grill. Low and behold they were Corns in oak oil. I searched for a price tag and saw $250.00. I thought not a bad deal, but i'll have to run back home for some cash. Then I looked again and the tag didn't say $250.00, it said $25.00. I could not get the money out of my wallet fast enough. My heart was beating 100 mph and my hands were shaking as I handed over the cash. I backed my truck up to the door and loaded them up. They looked pretty good with a few scuffs here and there but over all pretty decent. I saw right away as I turned them around that they were Cornwall II's from 1988. I chatted with the owners for a couple of minutes only to find out they were happy to get rid of these big old speakers. They did not want to haul them back in the house and they were getting ready to shut down the sale. I then took off fearing they could see the persperation stains growing under the arms of my Sunday church clothes. I high tailed it the 3 blocks back home and pulled in the garage and shut the door. I felt guilty like I had stole them or something, but I reassured myself they wanted to get rid of them, and that I have paid my dues to fall into another deal. Some may remember a couple of years ago when I scored my 1st set of Corns (76 CWO) from my Aunt for free. So I now have 2 pairs of Corns with $25 wrapped up in them. I'm telling you folks, presistance pays off. The deals are out there, but you have to find them they rarely are going to find you. I just wanted to share this tale with my forum buddies, especially those of you fresh off the Pilgrimage. I really wanted to go this year but could not. If I had gone I may have never scored this deal, so I guess it was meant to be. I have attached some pics, enjoy. Jeremy

I'm amazed that lynnm is still a top 50 contributor. I loved his whit and wisdom. I miss that guy, among others [] Jeremy

Probably a t-shirt and hat. Maybe a couple of beer glasses too! [] Jeremy

I've always wondered what your avatar was, Larry. I guess that clears it up a little bit. My son has been on a fishing trip with my Dad all week. I get to go pick him up in St. Louis tomarrow. Should be a good Fathers Day all around. Happy Pops Day to all the other Dads out there! Jeremy

I've used a couple of B&K amps with my BBX and i'm pretty happy with the results, but I have other weak links to address. Jeremy

You scored some great looking Cornwalls. I was eyeing them when Budman 1st offered them. I did not have the coin until yesterday, so it looks like I was a week or so late. Congrats and happy listening! Jeremy

This is a great thread for me as i'm going through my TD-124 right now, also building a new "heavy plinth". Thanx for the good info Scott. I would also love to see pics of the RCA plugs Allan mounted on the tone arm. I plan to do the same with my SME 3009. I have the RCA's, just need to come up with a good way to mount them under there. My plinth is getting trimmed out with dovetailed Mahagony to match my Blueberry. I can't wait to get it rolling, this thread has really got me fired up. I'm going to have to get a new stereo cart also, my 4 year old nephew trashed my old Shure cart and stylus. Congrats on the new toy Gary! Jeremy