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Old 12th September 2004, 12:43 PM   #1
hacknet is offline hacknet  Singapore
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Default Inductors made for crossover in an amp?

sorry for asking an elementary question but i kinda can`t find the answers.

Can inductors made for speaker crossovers be used for and amp`s powersupply?

i`m lookin at the ferrite core inductors on sale in madisound. at 19awg, how much current can i pass through it before it saturates?

Thank You!
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Old 12th September 2004, 01:07 PM   #2
SY is offline SY  United States
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Many amps but low inductance.
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Old 12th September 2004, 02:40 PM   #3
hacknet is offline hacknet  Singapore
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take for instance the 14.5H 19awg one going for ~$6.

is it any use in an amp ? i`m hopping to use in an KT88 SE monoblocks drawing 100ma Iq. i`m thinking of dumping 2 in series to get 30H which might be sufficient.

is it okaY?
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Old 12th September 2004, 03:25 PM   #4
jlsem is offline jlsem  United States
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Quote:
take for instance the 14.5H 19awg one going for ~$6.
Those are actually 14.5 millihenrys - only really good for intended application. There are no cheap power inductors out there except military surplus. Try Surplus Sales of Nebraska.

John
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Old 12th September 2004, 05:26 PM   #5
hacknet is offline hacknet  Singapore
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oh dang... read da units wrongly...

thanks anyway!
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Old 13th September 2004, 08:42 AM   #6
316a is offline 316a  England
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Default Re: Inductors made for crossover in an amp?

Quote:
Originally posted by hacknet
sorry for asking an elementary question but i kinda can`t find the answers.

Can inductors made for speaker crossovers be used for and amp`s powersupply?

i`m lookin at the ferrite core inductors on sale in madisound. at 19awg, how much current can i pass through it before it saturates?

Thank You!
Hello ,
No good , I'm afraid ! Too low in value and only rated for AC . I suppose you could always use cheap surplus SE output transformers and leave the secondary flapping . May also make so-so plate chokes

cheers

316a
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Old 13th September 2004, 08:52 AM   #7
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Well, you could use them with say 20mF (= 20,000uF), but that's only useful for a good number of amperes, at low voltage (read: SS).

However, they also represent greater loss due to having no core, or at least a ferrite one. A good power choke would use a laminated iron core, allowing more filtering for less size and loss. Though any inductance is better than the rampant CRC filters I saw on last look through the SS forum...

Tim
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Old 13th September 2004, 11:03 AM   #8
hacknet is offline hacknet  Singapore
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haha... i`m planning 30uf->30H->40uf of MKP caps for my powersupply....
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Old 15th September 2004, 09:49 AM   #9
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Just curious, why can't I find any details on winding a diy choke? I mean, we have the magnet wires, the E-I cores, covers and legs, the only thing missing is the number of turns and what size to use.

And I also have a manual rewinding machine.

Just a thought.
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Old 15th September 2004, 03:30 PM   #10
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