justin Posted May 31, 2012 Author Report Posted May 31, 2012 here is the proposed jack redesign. it is smaller (1x1") which is 60% the area of the last ones. the screw holes will fit #4 or M3 screws. washers/nuts can be up to 0.3" diameter before going off the corners. the diameter of the center is 0.700" so it will fit as a replacement for an original Stax jack. after measuring my Stax connectors, I think the original drawing had the pins spaced about 0.005" too far apart (if anyone can confirm, please let me know) so I have adjusted this.
Victor Chew Posted May 31, 2012 Report Posted May 31, 2012 (edited) Will the screw holes be threaded for the M3 screws? Just incase the front plates are thin. Edited May 31, 2012 by Victor Chew
justin Posted May 31, 2012 Author Report Posted May 31, 2012 no. if the front panels are thin, then you would use a nut on the other side. another option (that would increase cost) would be to thread 2 of the holes (diagonally) and leave the other 2 unthreaded. or i could thread all the holes, but not with M3, it would have to be M4 or #6-32.
Victor Chew Posted May 31, 2012 Report Posted May 31, 2012 No worries, them I guess, as an option, we could thread it ourselves. Could I have 4 jacks please? What is the height of the round stax portion please?
justin Posted May 31, 2012 Author Report Posted May 31, 2012 No worries, them I guess, as an option, we could thread it ourselves. Could I have 4 jacks please? What is the height of the round stax portion please? you can thread it but it would have to be larger than M3 the height of that is .250"
cetoole Posted May 31, 2012 Report Posted May 31, 2012 I am in for at least two normal and two pro to add to the collection. Hopefully my dreams of an unused diy parts based economy comes to fruition someday soon. 1
ujamerstand Posted June 1, 2012 Report Posted June 1, 2012 here is the proposed jack redesign. it is smaller (1x1") which is 60% the area of the last ones. the screw holes will fit #4 or M3 screws. washers/nuts can be up to 0.3" diameter before going off the corners. the diameter of the center is 0.700" so it will fit as a replacement for an original Stax jack. after measuring my Stax connectors, I think the original drawing had the pins spaced about 0.005" too far apart (if anyone can confirm, please let me know) so I have adjusted this. My jacks followed the original plans directly; and some of my jacks are tighter than others. I think it depends on how the pins are inserted and soldered to the adapter pcb. One of them had a smooth fit before I soldered the pcb adapter on. After I soldered the pins to the pcb, more force is required to insert and remove the jack...
wink Posted June 1, 2012 Report Posted June 1, 2012 Am I allowed to ask the cost of these little pearls?
justin Posted June 1, 2012 Author Report Posted June 1, 2012 Am I allowed to ask the cost of these little pearls? dont know yet! no more than any previous offerings, probably a little less.
The Monkey Posted June 1, 2012 Report Posted June 1, 2012 I guess I'll take 4 pro (unless too pricy, in which case I'll take 2).
justin Posted June 1, 2012 Author Report Posted June 1, 2012 Justin do you have the pins as well? yes, the pins will be installed
Pars Posted June 1, 2012 Report Posted June 1, 2012 dont know yet! no more than any previous offerings, probably a little less. About what were the previous offerings at? Don't have any stats, but never say never...
justin Posted June 1, 2012 Author Report Posted June 1, 2012 About what were the previous offerings at? Don't have any stats, but never say never... $20-25 per jack, i think?
jcx Posted June 1, 2012 Report Posted June 1, 2012 (edited) I'm aways curious about how solid teflon machined parts, especially any press fits, are expected to work for decades - has teflon creep, stress relaxation been taken into account? machining vs application temp can be a mechanical dimension tolerance issue too with a (crystal transition?) thermal expansion coefficient peak occurring around room temp - close to 1% volume change in range from 60 - 90 F http://www.rjchase.c...fe_handbook.pdf I would expect chassis mounting pretty much requires spring washers with flat washer - since I certainly have >60-90 F range in my apt over the course of a year solid polystyrene stock is also available - different problems, still great electrical properties Edited June 1, 2012 by jcx
kevin gilmore Posted June 1, 2012 Report Posted June 1, 2012 (edited) I have three sets of pins here, the originals I took from the conex sockets, The luvdunhill pins and the newest ones from Justin. All are slightly Different in diameter and the bigger ones require a slightly bigger drill Than my original print. Machining Teflon is a pain, I used water cooling to prevent creep. What I will eventually do is make some from macor and then there won't Be any dimensional change ever. And they will be $ 300 each Edited June 1, 2012 by kevin gilmore
flecom Posted June 2, 2012 Report Posted June 2, 2012 I would be interested in one pro and one normal if you are doing both types
justin Posted June 5, 2012 Author Report Posted June 5, 2012 some of the pins arrived today. samples are being machined now.
Nebby Posted June 6, 2012 Report Posted June 6, 2012 (edited) Bit late as well, I'd like a few (2-4 pro, depending on price, most likely 4 if pricing is similar to previous buy) as well if possible Edited June 6, 2012 by Nebby
justin Posted June 6, 2012 Author Report Posted June 6, 2012 not too late…please explain what you mean though when you say "a couple" or "a few" so this is easier later.
ujamerstand Posted June 6, 2012 Report Posted June 6, 2012 Forgot to specify how many pieces I'd like to have. I'd like to have 4 pro jacks please.
deepak Posted June 6, 2012 Report Posted June 6, 2012 I'm waiting to hear the cost, but I am interested in 3 pro
eggil Posted June 7, 2012 Report Posted June 7, 2012 I had said 2. I'd like 3 instead ( all pro bias).
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