(09-03-2017, 11:58 PM)Nowhere-Man Wrote: The theory is electrons would exit the battery cathode and enter the first foil layer. The dielectric would prevent any actual passage of electrons but would repel the ones in the other foil. At that point the charge should peak.
Yes, your knowledge of theory is good, but your understanding of it is not so good at all.
I feel your statements need some clarification in case a child or inexperienced person reads your post and gets the wrong idea.
You said "Even so, bear in mind up to 300 amps can flow."
Considerably more than 300 amps can be supplied by a large lead acid starter battery, but you do need a resistive load (very low resistance) to get these sorts of currents.
In the case of the capacitor example you mentioned this with , NO you will not get large currents flowing.
You said "You can also get 230 VAC from a 120 amp hour battery."
This is also a misleading statement, it needs qualification, yes a 12 volt battery can be used to supply an apparatus to generate very high voltages, e.g. ignition coil in a petrol engine, an electronic or rotary inverter to generate 230 volts AC.
But as far as a 12v battery giving 230 volts on its own, NO.
(09-03-2017, 11:58 PM)Nowhere-Man Wrote: In the very old days they used to use an grid bias battery like this and put a capacitor and neon lamp in circuit. The flickers could be used to measure capacity.
Not heard of this, maybe true, but I thought a neon needed a higher than 12 volt charge to get it to strike.
Most grid bias batteries were made from "dry cells" similar to our current zinc carbon types still in use today.
Mike
