Re: dielectric memory

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>

Tesla list wrote:

> Original poster: "Jeremy Sweeney by way of Terry Fritz
><twftesla-at-qwest-dot-net>" <ringmachine-at-yahoo-dot-com>
 
> Okay, this may be off topic, but I think it might be
> relevant.  In dielectric memory, I’ve heard of people
> experiencing the effect in absence of electrical
> currents, magnetic and electrical fields.

	I'd not expect that.
	It is normal for an efield to leave it's effect,
	which may be noticed at later times.


> Has anyone ever studied the effect of temperature
> differences in the capacitor?

	I've not, but...

> There is something called the Sebeck Effect (hope I’m spelling
> this right)

	Seebeck, i think...
	(Since you asked...   8)>>)

> where current can be induced

	I'd not use the word 'induced'.  In electrical work
	this has specific meanings (coupled mag fields,
	usually, which do not apply here...)

> through a loop made from two wires made from two different metals

	Just so.

> or semi-conductors

	Rather, in that case:
	semiconductor junctions joined by wires, then:

> by placing one joint in a high temp. and the other in a
> low temp. bath.  I’m thinking that somehow a reverse
> EMF might be generated by this effect when taking the
> unique properties of the resonance circuit into
> account.

	How?

	Hint:
	I've worked with thermocouples (for decades).
	per junction voltages on the order of 10s of
	MICROvolts per degree c are common for wires.
	Modestly higher voltages are achievable with
	semiconductors, purpose designed, over narrow
	temperature ranges.

	A few 10s of uvolts floating about the typical
	Tesla Coil circuit will have, i expect, little
	effect.

> I know that dielectric memory happens in anything with
> capacitance,

	Yep.  I learned about it in uVolt level Thermocouple
	(seebeck) measurements...

> but since it happens more often with caps that come out of
> TCs,
	I'd suggest that it is simply more noticeable with the
	higher voltages on the caps...

> then I think the nature of the tank circuit must lend some
> hand in amplifying the effect.  High frequency, High Voltage,
> High Current, and High heat all happen in a tank circuit.
> (How many have had a cap fail or explode because of heat or
> stress?)

	Seebeck (aka thermocouple) effects are typically in the
	MICROvolt range...

	best
	dwp