Inductance of choke core

[mspeedie]

Hi:

I'm a first timer so if this question has been answered already or if I should be in a different section of this site, let me know.

I am using snap-on choke core inductors at my DC motor to reduce EMI/RFI.
Dimensions: 13mm x 25.2mm x 3.5mm ferrite core.
Radio Shack product no. 273-0067.

These work great as I no longer have interference on my circuit board. The choke cores are, however very large. I would like to find the inductance of these choke cores so I can compare smaller alternatives. Radio Shack doesn't list the inductance of this part. I've called them but nobody seems to know.

Is there a way to determine the inductance based on the dimensions/material? I don't have a signal generator and was hoping to not have to purchase one. (Cash is tight).

I'm running my wires straight through with no loops.

Any insight is appreciated.

Mike

 

[davenn]

hi Mike
welcome to the forums

they dont have any inductance on their own, hence why radio shack doesnt list anything
there is only inductance once a cable is passed through with one or multiple turns

I have seen inductance calculators on the www where you put in the details of turns, wire size, etc and it works out the inductance for you.
have a google searchand see what you can find
you dont need a signal gene to find inductance, many multimeters have an inductance function

cheers
Dave