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In Reply to: Re: Anybody try air variable caps for RIAA networks? posted by dave slagle on October 31, 2001 at 09:24:45:
Dave,Pure water is a bad conductor of electricity. The problems start because of dissolved minerals. Use either high quality distilled or demineralized water.
Eli D.
Follow Ups:
dammit eli... don't make me try this... the whole thing was a joke... the copper plates would tarnish and contaminate the water too... maybe silver plates :-) possibly gold plated :-) i'm not worried about the breakdown... just want to get a clue if the whole thing is actually possible... and maybe get my ears on it for a day or two if it actually works... think of the threads... evian is smooth... pelligrino has a bubbly edge... and if you hav the $$$ cristal is the way to go... fwiw alcool has a lesser DC than water, but it is more stable wrt impurities... this is the diy fourum... so why not diy caps??? some sort of sealed system would be needed for anything liquid... hmmm batteries use plates and liquids... how different are they than caps... maybe they could be adapted...dave
dave
dave
Go on try it Dave, I've been bored to death lately we need a filip!!
well dan M could dunk that variable air capacitor in a glass of water and see what happens to the values... leseee assuming air = 1 and water = 70..... 750pf * 70 gives us a .5mfd varaible cap :-)just looked at the dielectric constant table... water is closer to 80... but get this... hydrogen peroxide is a whopping 121, anybody know how stable this is, and how it might respond to voltage potentials??? and for those of you whio had to know, cocaine is a mere 3.1, so save it for insulating your transformers.
dave
I ain't gonna stick no capacitor in no stinnkin water! :) I've got enough project brewing without some wacky thing like that. I just want to know if these sound at all good before I plunk down some $$Dan
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sissy... use them for cathode bypasses or for filament supplies... don't go tossing the plates out with the bathwater...dave
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Looking down your list dave I suppose bath water comes somewhere between urea and h2o, about 2 then!
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