[TowerTalk] ferrites for Beverage transformers
jim at audiosystemsgroup.com
Wed Apr 12 18:24:24 EDT 2017
I disagree, Rick, at least in part. The resistive component does NOT
contribute to transformer action. I do agree that loss is not a terrible
thing in RX applications, but it isn't a good thing either.
On Wed,4/12/2017 10:58 AM, Richard (Rick) Karlquist wrote:
> 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.
>> 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.
> Rick N6RK
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