[ARC5] Disc Capacitors

[Kenneth G. Gordon]

On 2 Mar 2013 at 16:37, Robert  Eleazer wrote:

> Does anyone know a good rule of thumb for diameter versus voltage
> relative to disk caps?  Bigger means higher voltage; that follows
> logically,

Actually, it is THICKER, not diameter, which means higher voltage in the 
case of disc-ceramics. 

There are several discs available at various rated voltages that all seem to 
be the same diameter. In fact, some are rated at higher voltages that are 
actually a bit smaller in diameter than those rated at lower voltages.

> since you need more insulation, but what kind of a estimate
> can we make based on size?

I am not sure you can. However, as I said, in my experience, the THICKER 
they are, the higher the voltage rating, generally.

As John said, the different ceramic materials of which they are made also 
comes into consideration.

Are there any markings on those capacitors at all? What are those?

Ken W7EKB