Re: PVC secondaries - environmental effects on coil performance

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

Original poster: "boris petkovic by way of Terry Fritz <twftesla-at-qwest-dot-net>" <petkovic7-at-yahoo-dot-com>


Hi Terry,

Did
> your Q change due to the change in self-C of the
> coil, or of some coupled-C to
> something else in proximity of the coil, or
> something else entirely (build-up
> of static charges on the dry day)??  Let's think
> outside-the-efield. 
> 
> My own observations lead me to believe that a change
> in humidity changes
> topload-C due to change in the permittivity of air -
> which requires a tuning
> change.

I think that humidity & temperature may change Q of
secondary in the lines of coilform watter absorbtion
capabilities.I expect this effect is expressed more
than change in cooper resistance caused by temperature
variation.
For various coilforms used ,the effect is
different,but in some cases predominant.
Thus,we may be talking in terms of variation of
intrisic C of coil,more than variation of air
permitivity that influences external C.

regards,
Boris
  

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