[Elecraft] my KPA1500 and 160M

[Adrian]

> Now then, whether you want to acknowledge it or not, a ferrite core IS 
> a lossy dielectric and can get hot when you put a high enough RF 
> voltage across it INDEPENDENT OF THE CURRENT FLOWING THROUGH THE 
> WINDING AROUND THE CORE.  You can find innumerable references to the 
> dielectric losses of ferrite materials if you just bother to do some 
> internet searching.  This is NOT an insulation breakdown issue ... not 
> at all.
>
A dielectric is defined as an insulator . A ferrite core is not a 
dielectric (insulator),  This is the false fact in your theory.

*Dielectric heating*, also known as*electronic heating*,*radio frequency 
heating*, and*high-frequency heating*, is the process in which aradio 
frequency <https://en.wikipedia.org/wiki/Radio_frequency>(RF) 
alternating electric field, orradio wave 
<https://en.wikipedia.org/wiki/Radio_wave>ormicrowave 
<https://en.wikipedia.org/wiki/Microwave>electromagnetic radiation 
<https://en.wikipedia.org/wiki/Electromagnetic_radiation>heats 
adielectric <https://en.wikipedia.org/wiki/Dielectric>material.

It is the dielectric material being heated via molecular rotation.


A ferrite core although not a good conductor also is not a dielectric, 
and no mention of dielectric loss is attributed to its heating losses ;


https://elnamagnetics.com/wp-content/uploads/library/TSC-Ferrite-International/Predicting_Temperature_Rise_of_Ferrite_Cored_Transformers.pdf