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Old 18th May 2009, 03:39 PM   #1
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Default Where are these caps used?

Hi,

Was having a bit of a rummage through some out-of-date electrolytics, and came across a few of these:

(see pic)

They're 7500uF + 7500uF dual section electrolytics @ 25V

I've dug around, and apart from one uninformative catalogue reference and one Google hit on someone selling some NOS ITT parts of the same value, I can't find out anything about what equipment they were originally used in.

The ones I found were from 2003, so there must have been some ongoing use for them.....

Someone must know....!!!

Any information gratefully received.

Cheers,

Matt
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Old 18th May 2009, 04:02 PM   #2
Minion is offline Minion  Canada
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These dual section electro"s are probably used in The Power supply of an amp or simular , they could also be used as the output caps in a lowish powered single ended amp , or really anywere you need a 7500uF electro....


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Old 19th May 2009, 12:25 AM   #3
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i am guessing that the connections are two positive leads and one negative lead. if so it would probably be for a dual power supply, like a +12/+5V supply, or for a pi section filter with a choke between the two positive terminals, the power supply on one side and the load on the other.
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Old 19th May 2009, 12:27 PM   #4
riktw is offline riktw  Netherlands
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hmm, high power power supply's, i have seen stuff up to 20.000uF in an 12V power supply.
class A amp's of 10~20 watts normally need 20V and -20V, maybe from something like that.
so anything that needs high current and a low voltage.
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Old 19th May 2009, 12:44 PM   #5
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Thanks chaps - really interesting responses.

One further question:

Does anyone actually design in high uF/low voltage dual sections like these anymore (apart from for neatness when replacing one in an old PSU)?
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Old 19th May 2009, 01:48 PM   #6
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Afaik, Fischer & Tausche used to be the only remaining manufacturer of low voltage dual section electrolytics on this (in)continent in 1K9.

Their LFAX is a general use 105C type, mainly to save space, same goes for the higher voltage LFAZ range.
Electrolytics have become much smaller, no use for duallies i suppose.
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