On 4/12/2017 10:10 AM, Jim Brown wrote:
wind inductive components (transformers) for 2-4 MHz.
Sorry, but I don't consider "inductive" components to
include broadband transformers at receiving power levels.
Beverage transformers fall into this category.
In these cases, the only thing that matters is the magnitude
of the impedance per turn. It doesn't matter if this
impedance is entirely resistive.
http://www.fair-rite.com/files1/Fair-Rite_Catalog_17th_Edition.pdf
Material specs begin on page 10. Page 30 describes #73 material. A quick
study of the first graph of complex permeability vs frequency shows that
it is a poor choice as an inductive component above 1 MHz. Why it has
become popular for Beverage transformers is a mystery to me. The only
73, Jim K9YC
No, #73 is popular for Beverages because you get considerably more
impedance per turn than, say #43 material.
73
Rick N6RK
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|