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Old 22nd June 2007, 06:22 AM   #21
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Quote:
Originally posted by Zen Mod
main page- new arrivals - somewhere in middle of page

http://www.apexjr.com/images/AVEMCOMAGNETICS.jpg
$20 each! For an 8mH unit. I tried looking them up on the Avemco site but couldn't find anything on them...

Would they be iron cored? They don't look big enough for air-core...
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Old 22nd June 2007, 08:52 AM   #22
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Geeh@,

how hard can it be to recognise a toroidal choke.
Goodmorning campers@2 => DingDong

Some really cool chokes can be wrenched out of worndown big bucks gear, such as this 8mH fat boy with 3.5mm diameter enamelled copper winding.
Buy it if you can't wrench it out, borrow or steal it.

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Old 12th June 2008, 05:54 AM   #23
Luke is offline Luke  New Zealand
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Default how bout these puppies

I got 8 of these and Im not sure how suilatble they will be in a CLCLC aleph-x psu. I think the resistance is around 0.1 ohm or so and imagine the inductance to be 0.5 mH if Im lucky. My biggest concern is will they saturate at 6 amps bias? How can I know or work it out?
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Old 12th June 2008, 05:57 AM   #24
Luke is offline Luke  New Zealand
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wire gauge is 2 mm
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Old 12th June 2008, 08:55 PM   #25
Luke is offline Luke  New Zealand
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no comments on my inductors?
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Old 12th June 2008, 09:16 PM   #26
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Luke
no comments on my inductors?

if wire is really 2mm in dia , why you just don't try them ?
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Old 12th June 2008, 09:25 PM   #27
sinuko is offline sinuko  Italy
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Quote:
no comments on my inductors?
Is an air gap present?
If no....they saturate, if yes..... try them.
Paolo
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Old 12th June 2008, 09:30 PM   #28
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Default Measure?

You could connect all 8 in series and measure R.
By size and 2mm wire I guess something like .3 to .5 ohms per
inductor.
Let's say .5 ohms worstcase.

Then if your Aleph-X draws something like 7 amps
the math is easy.
i.e. P=I.I.R so P=7.7.05 = 24.5W all the time each inductor.
That's a little to much for something like that.

Moral of story, try to measure first, test apply second, then
decide if they are usefull.

I hope this helps a little
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Old 12th June 2008, 11:17 PM   #29
Luke is offline Luke  New Zealand
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thanks thats very helpful guys, I never thought of tieing them all together to get the total resistance And then work out power disspated.
I cant see an airgap so I would have to say no, I expect anything over 10 watts would be too much for them.
If I try them and the power supply works, how do I know they are acting as inductors and not fancy resistors, cos I would rather just use resistors than these things if they arent doing anything?
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Old 13th June 2008, 12:03 AM   #30
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That shiney medal used to help mount them is probably covering
the air gap.
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