Diy AMT

[båndsei]

I have sent 2 enquiries for alu/pet film.One to UK and one to Tyrkie.
My laminator is with thermostat switch.Original is 135' C. At my first tests i had removed the switch ,and controled the temperature by reducing mains ac 220 to app 150v using variotransformer.
Now, i mounted a 170'C.thermostat switch but it reaches 170' and drops to 150'.
I have ordered a 190' thermostat switch.
I made a bid at a PID thermostat at 10 USD. and got it.Looks like this:AC 110 220V SSR PID Digital Thermostat Controller for K Temperature Sensor | eBay

Bernt
The Laminator

 

[solhaga]

Before I also buy a laser printer and some glossy laser photo paper, could you try ironing on a alu/paper foil with glossy paper?
It doesn´t need to be a full membrane layout.

Another thing, if the ironing method is used, several layers of toner plastic could be applied to get the desired thickness of transfered toner.
It´ll just be a question of re-aligning the paper to the alu.

BTW, I started with the photo resist method. Almost used up a can for one alu sheet.
I doubt it will work and it will for sure be expensive.

 

[WrineX]

Why is noone using photoresist spray and developer. i know its more hassle. but it might get better results

 

[solhaga]

What spray brand do you recommend?

With the one I´ve have been trying is it very diffucult to get an even surface layer of photo resist due to that the aluminium surface is to "glossy".

 

[WrineX]

What spray brand do you recommend?

With the one I´ve have been trying is it very diffucult to get an even surface layer of photo resist due to that the aluminium surface is to "glossy".

ai cant help you with that , because i never use it, i just know it has usually more detail then toner transfer. you tried it on the non glossy side of the foil ? this could make a diference. and a really good clean could help to. further use more then normally to get a nice layer. a foam pad could help even things out as well or use a rubber roller. like they with etch art. just a few idea's cant say i tried it

 

[solhaga]

The matte side of the alu is still to "glossy" for the spray. Like I said above, almost the whole can went when I tried to cover one A4 sheet of alu. One can is about 20 EURO.

Maybe the alu can be primed. The primer then has to be able to let the acid through.
Do you have suggestion on what to use?

 

[solhaga]

Perhaps this method will work better.
Seems hard to get, though, in Sweden at last.

 

[WrineX]

thats sad. uhm maybe let someone laser it out of a transperant overhead sheet and us it as template for the stuff used to make etches ? or maybe even spray paint ? dont know if thats enough

ofcourse this limits the shapes and forms possible

cant er put the foil on a glass plate with some soap and water, en slightly roughen the surface? sanding paper or steel wool?

 

[båndsei]

I am still eksperimenting with toner tape and alu/paper.
Have not got any 12/12 alu/mylar yet:The tyrkish dealer would only sell 500Kg.
Have just spotted this one:

Seen here:http://www.audio-consulting.ch/?Products:Speaker:Super_Tweeterfor_the_Rubanoide_Family

Bernt

 

[Baldin]

Most probably based on the new Mundorf AMT 27D1.1 ..... can be had at the loudspeaker shop Strassacker: Speaker Building, Components
for 549 Euro each .... so Audio Consulting add a little wood and charge CHF 2550.00/each

 

[Baldin]

By the way ... have you checked out the new line of AMTs from Dayton ... 150 USD for the largest!
Dayton Audio AMTPRO-4 Air Motion Transformer Tweeter 275-094
.... maybe not as good as the Mondorf ..... but hard to beat that price ....

 

[båndsei]

I think you are right.
I haven¨t seen the Mundorf before.
They have aded a transformer too, to get sensivity right.

Bernt

 

[båndsei]

I have been working on a new Tool :

It is made with 0.9mm stainless steel wire .
I hope I recive a roll of alu7my and mylar 15my.soon.

Bernt

 

[solhaga]

How do you make the folds keep their shape during the baking?

 

[båndsei]

I have not tried the Tool yet.I will use 6-7mmX 0.7-1mm.steel or alu plates in betwene the wires.
The diaphragm shown is made from my 12/12my. sample. It is only 70mm. long/high .
The factory will ship my 7/15my. X180mm film after the Chinese Hollyday, starting at 1. Oktober.
The Tool is made with M6 tread,with 1mm increase.If you use M8 it is 1,25mm. M10 is 1,5mm.

Bernt

 

[solhaga]

Perhaps some form of egg slicer technique could be used:

 

[Greebster]

^ may work IF it was shaped into a V so the folds start in the center. Or another way would be to start at one edge. Otherwise the tension would be quite high dragging the film through possibly damaging it.

 

[angeloitacare]

By the way ... have you checked out the new line of AMTs from Dayton ... 150 USD for the largest!
Dayton Audio AMTPRO-4 Air Motion Transformer Tweeter 275-094
.... maybe not as good as the Mondorf ..... but hard to beat that price ....

these amt's are made at Tianle in China. I can get them much cheaper.

 

[Baldin]

That is interesting ... can we get them cheaper as well??

 

[angeloitacare]

That is interesting ... can we get them cheaper as well??

I can ask. Normally they do want to sell in large quantities ,and sell only small numbers, when its for sample units. But some companies are more flexible.
In case they agree, i would offer them for us$ 200,00 the pair, plus shipping.