[Boatanchors] F455FA21 and F455FB21 difference

[GRANT YOUNGMAN]

There is information specific to the FB-series filter on this page:

http://www.angelfire.com/de/vk3kcm/filters.html

Scroll down to near the bottom.

Grant NQ5T



> On Mar 5, 2015, at 7:53 PM, HL1FB <yonglee at yonsei.ac.kr> wrote:
> 
> Thanks for all the responses. Nothing is concrete.
> 
> I have both filters. They are exactly the same dimensions.
> 
> And measures the same in my IFR1600 traxcking generator. 
> 
> Collins tube radios use FA type and some solid state radios like 
> 
> the old SBE34 use FB type.
> 
> So I guess only impedance is different but not certain.
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