[Amps] Resonant choke filter

[Will Matney]

Don,
I read that about the lam stacking on an audio website and I thought I 
seen it on Hammonds website also. What it said was the chokes were being 
supplied interleaved like transformers. I know for a swinging choke, it 
supposed to be gapped. Your correct on the swing, the larger the gap the 
more reluctance of the core. As the DC current raises, the inductance 
drops and hopefully does not completely saturate allowing zero 
inductance. So a swinging choke is supposed to not saturate as easily. 
Another thing I read was them saying being stacked interleaved still 
seemed as a gapped core. I don't see this that much because that's the 
reason for using interleaved stacks, to stop any reluctance. This choke 
I have here, I bought some time back. I thought it was a Hammond but I 
don't see their stamp on it. It is made with butt stacked lams so I 
assumed it was a swinging choke. They're using "keeper" end lams to hold 
it together and is an open choke. If it's not a swinging choke, I could 
not tell you by what you've told me now. I know it's a 5 Henry choke 
because it was on a card attached to it. I'll still give it a try making 
it resonate and hopefully it will work ok. The main thing is I wanted to 
clean up the DC supply before it was regulated. This is a bench power 
supply for myself and thought I would do it right the first time. Thanks 
for the info!

Will Matney

K9MUF at aol.com wrote:

> In a message dated 8/2/2004 11:53:04 PM Central Daylight Time, 
> craxd1 at ezwv.com writes:
>
>> Also, by what
>> I've read, the chokes made today using interleaved lams still act
>> somewhat like a resonant choke with a gap but the swing is not as large.
>> I seen a couple of remarks that they could not saturate easily, but I
>> think they can.
>
>
>
>
> Will,
>
> I don't think any chokes are made with interleaved laminations. As far 
> as I know' all chokes are made with the "I" lams butted up with the 
> "E" lams. The only  difference is that swinging chokes have a wider 
> gap between the "E" and the "I". You are correct  in that any choke 
> can saturate but swinging chokes do not saturate as easily as 
> "constant" inductance chokes. Even so called constant inductance 
> chokes are not constant, but change their inductance with load, but 
> not as much as swinging chokes do,
>
> Don    K9MUF