[Amps] difference between 2,3,4 and 43, 45, ... materials?

[Dan Sawyer]

Thanks,

Does a quick bench test of winding two coils of equal turns and then 
driving one with a 50 Ohm sweep generator and terminating the other in 
50 Ohms show a good representation of the bandwidth of the material?

Thanks - Dan

Alex Eban wrote:

>There is no difference:
>The 2 number series was originally put out by Indiana General company and
>the color code is the brainchild of Micrometals.
>Ususally, for resonant circuits the frequency range is that one which allows
>a maximal Q factor of the finished coil.
>For transmission line transformers, a very important role of the core is to
>increase the parallel inductance of the winding so that it won't shunt the
>RF energy to ground. You need a low Q ferrite and transformer. The core has
>to be most effective at the low end of the frequency range, hence the red
>core which is recommended for operation to 10 MHz is a better choice .
>Alex,	4Z5KS
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