[time-nuts] 10811-Parts... (Using the thermal regulator circuitry)

[jimlux]

On 9/14/19 7:43 PM, Richard (Rick) Karlquist wrote:

> In the 40 years since the 10811 was designed, AFAIK, there
> as been zero (0) progress with respect to the capacitance
> per cubic centimeter of foil capacitors.
> 
>

I think that's because you're up against physics - foils can only be so 
thin before the resistance goes up, there's no magic plastic for the 
dielectric. You get to store a certain number of joules in a given 
volume of dielectric- you can scale things - reduce the voltage by a 
factor of 2 and you can get 4 times the capacitance in the same package.

The only way to get higher energy density is to go to a dielectric with 
higher epsilon, but that brings its own set of problems, especially if 
you want to stay with solid dielectrics.  (there are some interesting 
energy storage capacitors for short pulses that use water as the 
dielectric.. that epsilon of 80 is attractive)