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Old 19th March 2011, 11:07 PM   #21
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Well, IMO ,go for price per (/) material volume per (/) field strength vs surface area /

I hope I (said that right)

I figured out a formula for capacitors aswell.


farads / voltage / price

The lower the better.

Been a while since I figured that one out
Anyway the most density for the price of course.

stacking them is like putting batteries in series .jer

Last edited by geraldfryjr; 19th March 2011 at 11:10 PM.
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Old 20th March 2011, 12:59 AM   #22
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i just found a product that may be of interest for making diaphrams
Chemtronics | Workshop Consumables | Adhesives, Sealants and Tapes | PCB Compounds and Adhesives | Conductive Adhesives-PCB Compounds and Adhesives |CW2900

it is a conductive silver paint pen ,it could be used to draw nice tracks on a mylar ribbon from top to bottom instead of glueing aluminium to the maylar

heres another
RS | Workshop Consumables | Adhesives, Sealants and Tapes | PCB Compounds and Adhesives | Conductive Adhesives-PCB Compounds and Adhesives

if conductive enough you could simply lay out your mylar and draw your tracks top to bottom ,it would only work for a segmented ribbon though and i,m not sure how it would hold up to corrigating

cheers sheafer
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Old 20th March 2011, 01:07 AM   #23
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heres something that may work
silvaspray

expensive though
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Old 20th March 2011, 01:18 AM   #24
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The last time I bought one of those pen's was in 1992 for $14.95 from MCM.
The second one was in 1996 for $17.95.
At that time I thought the price was absurd.
Luckely it was still good in 2001 and when I repaired my apogee panel. jer
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Old 20th March 2011, 01:23 AM   #25
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I still have some nickel print from M.G chemecals that I paid $8.95 a bottle in 2003 from cannada.
shipping was almost double. jer

Last edited by geraldfryjr; 20th March 2011 at 01:26 AM.
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Old 20th March 2011, 01:24 AM   #26
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hi jer
so how were your results ?

there are many other types of paint i have found now seems like an easy way although getting a pen with a tip of around 5mm may be hard

would work well with say a ribbon of 1.2m long by 50mm wide with say 9
5mm tracks with 1mm spacing between

cheers sheafer
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Old 20th March 2011, 01:34 AM   #27
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Well, it seems that nothing(likes to) sticks to mylar. jer
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Old 20th March 2011, 01:39 AM   #28
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Have you not tried this?
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Old 20th March 2011, 01:43 AM   #29
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hi jer
yes i have built a couple of esl speakers and there are a few products that stick quite well
polyureathane glue being one of them

one of the silver pens i provided a link to specificly mentions mylar ans flex circuits so i think its workable

longevity is unknown though as the ribbon will constantly be moving

cheers
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Old 20th March 2011, 02:26 AM   #30
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Oh, Okay. I found that the stuff is very flexible and I have even been able to solder too it but it is very tricky.
I also tried to use it as a base to plate copper .jer
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