[Elecraft] Choking KPA500 and testing a box of unknown chokes

Don Wilhelm donwilh at embarqmail.com
Mon May 22 16:08:22 EDT 2017


Mike,

You may be over-thinking it.

Wrap 10 turns around the core and measure its inductance.

 From that data, you can calculate the AL value.  Match that AL value 
against a chart of the values for various cores.

73,
Don W3FPR

On 5/22/2017 9:30 AM, Michael Walker wrote:
> All
> 
> I am doing some work on a box of chokes I received and I am trying to
> figure out just exactly what mix they are.
> 
> I have a tracking generator, so I am trying to figure out  a test jig.  Do
> I just wrap the choke in fleedline, have a common ground and then use the
> shield of the feedline to feed my signal over looking for the attenuation
> on the receiving end of the generator?
> 


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