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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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22nd Jan 2020, 6:16 pm | #1 |
Nonode
Join Date: Jul 2010
Location: Folkestone, Kent, UK.
Posts: 2,172
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Tantalum ESR?
H folks
a simple question, can one measure a Tantalum cap for ESR like you would an electrolytic? Thanks |
22nd Jan 2020, 6:26 pm | #2 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,867
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Re: Tantalum ESR
Yup.
Because of ther non-wound construction you can find quite low ESL and ESR values from a good one. However, it's been found that one way to dispatch the little devils to the afterlife is to use this low impedance to carry high ripple or surge currents. It's recommended to use them in series with a current limiting resistor which neatly removes the low-Z advantage :-( David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
22nd Jan 2020, 8:15 pm | #3 |
Nonode
Join Date: Jul 2010
Location: Folkestone, Kent, UK.
Posts: 2,172
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Re: Tantalum ESR
Many thanks David
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22nd Jan 2020, 8:34 pm | #4 |
Moderator
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,864
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Re: Tantalum ESR
If you want to experiment with some tants I offered some FOC but after 2 pm's no response so your welcome to play.
Cheers Mike T
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Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk |
22nd Jan 2020, 11:14 pm | #5 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,867
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Re: Tantalum ESR?
Beware, though, if you feel tempted in your experiments to try one with reverse polarity to watch it go up, the yellow-green staining they create is the very devil to shift.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
23rd Jan 2020, 11:12 am | #6 | |
Heptode
Join Date: Mar 2008
Location: Camberley, Surrey, UK.
Posts: 805
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Re: Tantalum ESR?
Quote:
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23rd Jan 2020, 6:27 pm | #7 |
Dekatron
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,199
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Re: Tantalum ESR?
You can measure ESR, but if it measures correctly the tantalum can be short circuit as well, so when testing, always use a dc ohm measurement as well.
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