EAP speaker? here we go!

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#44
Well got the VHB ..... and yeah this is so thin its complete a fail 🙁 i in the end managed to make 2 menbrames but the dielectic is either to low so its arcs. or my power suplly does not have enough power. or the menbrame is pierced somewhere. i tried serveral times no luck. i guess the only good use for it is indeed to use it as tape, because it does stick verry well 🙂 im thinking of buying the 4910 VHb or 4905. but i first have to recover from this major fail. 🙁 and maybe get a better power suplly source to rule out it is the high voltage at fault. because i could not get ANY movement.

The people online use those emco blocks for high voltage, but cant imagine they are powerfull at all.
 
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#45
Well, as it sems i have to increase the capacitors in my cascade, reduce the amount of stages since my ac supply can output 700volts, with 2 stages im already at 2800 volt instead of the 6 stages i had..... and must increase the voltage rating as well since 1 off them started to make noise. i must add a high omh resistor, as bleeder resistor.

the emco used in the youtube video deliverd 3 mA at 6000 volt (he used it to max 6 volt input) wich results in max 1.5 mA at 3kv.

Il try to order some 4905 (as soon as i get paid) as seen in the youtube movie, wich is not as fragile and we've seen it work so it must be a safe bet.

for now... ill just wait 🙂 and fix the power suply before the tape comes
 
#46
well i got at least a result... finally so now i know the power suplly is more then enough to power an EAP. i taped 8 layers of VHB 4960 to each other, so overall 0.4mm then stretchs it 2.5 times so its somewhere around 0.15 mm thick. conductive layers are silicone lubricant 🙂 (wonder from wich part of the house that came from 😉 ) and cheap graphite lubricat powder for locks. to create a conductive paste that can stretch with the menbrame



here is a small and bad quality video, my phone sucks and there is not enough light

https://www.youtube.com/watch?v=uIBTvPOo0-Y&feature=youtu.be
 
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#48
hmm made a single eden one with sort of dome created by air behind the menbrame. that onle played louder, it was not push pull. but when it arcs once. you can start all over it burns a hole, and keeps arcing so you have to make a new menbrame 🙁.
 
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