hihi the shop i found few years back, just wanted to give him the same link 🙂 well i used this tape on a magnepan tymphani 1D they sounded pretty nice. but when you ever overheat them hard the glue might soften. witch is not that nice 🙂 for high frequency's i sometimes had some annoying resonances with this type of tape(not on the tympani). the alu is rather hard.
also 40 micron thickness is pretty thick, witch ensures good power handling BUT, it could be a problem in impedance departement. laying down the tracks is a fiddling business to and turns a re pretty hard to make nice. for you high frequency ribbon my best bet is using some sort of etch or cutting method by a cameo machine, bandsei and solhaga know everything about the cameo i think.
so many choices, but you could try it first with the tape its not expensive and its a good start the other 2 options are a bit more complicated and are in need of other tools.
it does stick very well, it could rip the mylar before you can pull it off.
problem is heating, mylar shrinks and the tape does not when heated. so power handling is something to take into account. hence why most use kapton in there speakers. but its almost impossible to get that at 2 micron thickness.(not ever seen it once)
you can find the 30nf in germany. will take a look at my favorites if i got a link somewhere. its a 1 liter can and around 40 euro if i remember correct
So glue is problem. It should be temperature stable. I hope experimenting will
show the best option (glue).
show the best option (glue).
well not only the glue, since when you put an amount of power trough the foil, it might heat up shrink the mylar and not the foil so it will wrinkle. this could cause resonances. but of course if you never reach that amount of power it should not be a problem at all.
the glue from the foil does stick nicely and i did say it might be the glue of the foil letting lose i think i might be wrong there and it is the mylar that shrinks a bit.
masking shop says
40 Micron Aluminium Foil with Acrylic Adhesive
• Good Temperature resistant up to 150°C
• Excellent barrier against humidity and vapour
• Conducts heat very well
up to 150, well at that stage mylar becomes an issue. so they are pretty well matched. in terms of temperature handling.
so if you gone be using mylar anyways this tape will do the trick. and they both fail at around the same temp. so just keep under it 🙂
i once made small panels with even thinner traces then the 3mm and they where able to melt the mylar. but your panels are way bigger. so i would say give it a shot. would save you on glue and fancy equipment to
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one last thing try to make the turns on the membrane not on the spacers, the foil might brake and or starts resonating if the turn is made on the spacer. to keep the turn out of the magnetic field you could drop the upper row and bottom row of magnets. if you panels allows that and of course if you want to scarify the few cm2 in active surface area. (usually nothing much happens near the edge of the spacers anyways except some high frequency's)
WrineX are you sure that
3M™ Scotch-Weld™ 30 Kontakt-Klebstoff 1 l Dose 12345
is enogh good for mylar. I found that Magneplanar recomend 3M Fastbond 30NF or maybe there is no difference.
3M? Fastbond? Contact Adhesive 30NF Neutral, 5 gal Pail, 1 per case
3M™ Scotch-Weld™ 30 Kontakt-Klebstoff 1 l Dose 12345
is enogh good for mylar. I found that Magneplanar recomend 3M Fastbond 30NF or maybe there is no difference.
3M? Fastbond? Contact Adhesive 30NF Neutral, 5 gal Pail, 1 per case
yes 30nf i know. but there is some confusion or it is the same sinc, when searched for scotchweld 30 i get redirected to this
3M Scotch-Weld 30, universele contactlijm op waterbasis (1L) | Welkom bij Van Asperen kleefstoffen, lijmen en tapes, duct tapes
even the datasheet is from fastbond 30nf
it looks like scotchweld is fastbond.. will take a look at both datasheets. since i ordered 30Nf and got scotchwel 30 from that german shop before, now they renamed it to scotchweld 30
i think scotchweld is European brand and fastbond US
not sure why , because it is really confusing.
we might need to ask 3m
3M Scotch-Weld 30, universele contactlijm op waterbasis (1L) | Welkom bij Van Asperen kleefstoffen, lijmen en tapes, duct tapes
even the datasheet is from fastbond 30nf
it looks like scotchweld is fastbond.. will take a look at both datasheets. since i ordered 30Nf and got scotchwel 30 from that german shop before, now they renamed it to scotchweld 30
i think scotchweld is European brand and fastbond US
not sure why , because it is really confusing.
we might need to ask 3m
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I found that Magneplanar doesn't shipp 3M Fastbond glue during winter period because is very sensitive on low temperature. I have to order it from somewhere but now I'm not sure how to do it because in all Europe temperature is very low. In my country I can buy minimum 6L.
did you ask 3m if scotchweld is fastbond?
as far as i know magnepan did not ship there old glue during winter. i am not sure if the same goes for 30nf, never asked them to ship it. i did ask them if they used 30nf and they did confirm this. and as far as i know 30 and 30nf are the same. you can order 1 liter easily from germany to your country. look at the datasheet if it will survive freezing temperatures. after all it is waterbased 🙁
as far as i know magnepan did not ship there old glue during winter. i am not sure if the same goes for 30nf, never asked them to ship it. i did ask them if they used 30nf and they did confirm this. and as far as i know 30 and 30nf are the same. you can order 1 liter easily from germany to your country. look at the datasheet if it will survive freezing temperatures. after all it is waterbased 🙁
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No I didn't 3M if scotchweld is fastbond but according specification both contain same chemically "POLYCHLOROPREN".
How did you tension membrane?
How did you tension membrane?
yes i have for serveral ESL's like quad 63 audiostatics es300RS, solosound 4 and 8. and in allot of projects of my own, like small magneplanars and esl's .
it is kind of a debate how to stretch 🙂 you can stretch something fast with just some tape if resonance is not that critical. if it is it becomes much more complicated. especially when you want to keep that same resonance over months/years.
like magnepan its pretty hard since they tuned there membrane. unless you know how its going to be hard to replicate
one form is stretching it , glue it then use a heatsource to relax the film. the resonance will be always the same(well at least close) but then you have to determine it with size instead of tension. if you only use stretch it becomes hard to predict
it is kind of a debate how to stretch 🙂 you can stretch something fast with just some tape if resonance is not that critical. if it is it becomes much more complicated. especially when you want to keep that same resonance over months/years.
like magnepan its pretty hard since they tuned there membrane. unless you know how its going to be hard to replicate
one form is stretching it , glue it then use a heatsource to relax the film. the resonance will be always the same(well at least close) but then you have to determine it with size instead of tension. if you only use stretch it becomes hard to predict
Actually I started this project just to get some experience knowledge before I start much bigger speaker like Magnepan. I don't think that it is too difficult When you use proper tools. Experimenting is best and only thing that we have in DIY community. I have enough experience with Ribbon so this part is finished. 2 years ago I successfully experimented with true double magnet ribbon.
Now I have some open question regarding tensioning which are difficult to find anywhere. I am not sure about relation tensioning and radiating sound pattern.
I think Magnepan latest model 20.7 did some things wrong. They didn't take advantage of true ribbon to maximum. Ribbon should be wider so it can go lower.
Than it could be only 2 way panel. This is my opinion.
Now I have some open question regarding tensioning which are difficult to find anywhere. I am not sure about relation tensioning and radiating sound pattern.
I think Magnepan latest model 20.7 did some things wrong. They didn't take advantage of true ribbon to maximum. Ribbon should be wider so it can go lower.
Than it could be only 2 way panel. This is my opinion.
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