Ok Tom. BTW there is some possible benefit to doing multiple passes of
the wire through the ferrite. I don't know the math, but something or
other squared, or whatever. Each pass of the wire through the ferrite
increases whatever magic it is doing by some factor or other.
The other side of the coin is that for 2 same size ferrites with
different size holes, means that for the one with the larger hole,
there is that much less of the actual ferrite material present.
Just use whatever you have and it should work just fine. Just be sure
not to pinch the wire when you snap it shut, especially if working with
audio cable, or RCA cable going to the amp.
73 Happy Thanksgiving, Steve KW3A
On 11/22/2012 10:11 AM, Tom Behler wrote:
> Thanks, Steve.
>
> This is what I thought, but I wanted to be sure.
>
> And, thanks for the source on RF chokes.
>
> I'll add it to my growing stack of helpful ham radio web sites.
>
> Tom Behler: KB8TYJ
>
> ----- Original Message -----
> From: "Steve Forst" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, November 22, 2012 8:43 AM
> Subject: Re: Winding wire in snap-on RF chokes
>
>
>> Tom,
>>
>> These things come in various sizes, and generally you would use the
>> proper size to fit the wire snugly. You would lay the wire in the
>> groove, kind of like laying a hot dog in a bun and snap it closed.
>>
>> If the groove is large enough for multiple passes of the wire, you can
>> wrap the wire around one half of the choke multiple times: long ways,
>> end to end through the groove. You will still need to snap it shut
>> without pinching the wire.
>>
>>
>> What I got here for a buck each 4 or 5 years ago are now $2 each, but
>> one source for different sizes is:
>> http://www.allelectronics.com/make-a-store/category/235/Ferrites/1.html
>>
>> 73, Steve KW3A
>>
>>
>> On 11/22/2012 8:27 AM, Tom Behler wrote:
>>> Hi, all.
>>>
>>> I need a little Elmering on something.
>>>
>>> I am dealing with some minor RFI issues here in the home shack, and have
>>> a
>>> few RF chokes that I'd like to try to see if they will take care of the
>>> problem.
>>>
>>> The chokes are the snap-on variety, and are about an inch and a half
>>> long
>>> and about 3 quarters of an inch wide.
>>>
>>> When you open the choke, there are round indentations on each side where
>>> wires are supposed to go, and there is a hinge in the middle to allow
>>> opening and closing.
>>>
>>> My question is this: How do you wind the wires in the choke for best
>>> results? Do you wind the wires themselves into a coil, and then snap the
>>> choke around the coil, or do you wind the wires around each side of the
>>> choke?
>>>
>>> I know that, to some, this may seem extremely elementary, so thanks for
>>> your
>>> indulgence with this thread.
>>>
>>> Happy Thanksgiving to all!
>>>
>>> Tom Behler: KB8TYJ
>>>
>>>
>>>
>>
>
>
>
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