Cheap 30uf caps

jr@mac

https://m.ebay.com/itm/5-30uF-250V-5-30MFD-High-Frequency-MEA-Metallized-Film-Capacitor-LOW-ESR-RoHS/262864134058?hash=item3d33ec5faa:g:L~QAAOSwax5YrM1F

I bought several lots, they measure well. Good for stacking to make large values.

Wolf

Tecate Industries products, being the TI. I've had some of them before and the value measured 2-3uF low on 18uF parts. As for the sound, if you care, they really had a closed-in midrange, not open at all. Also be advised that these are MET/MKT, not MKP. They will have higher DCR than even standard range Dayton caps due to construction and materials.

jr@mac

Sorry you had a bad batch, Wolf. 

jr@mac

I also have some yellow TI 18uf I bought from Alex Jr that all measure within 2-3% - or better. Same with a handful of 15uf yellow TI. 

Sound I will leave up to people who like to have those conversations.

jr@mac

Apex, not Alex - "smart" phone lol.

Wolf

Yes- mine were from Apex Jr.

Wolf

These on the other hand, are mighty tasty!

https://www.allelectronics.com/item/mkp-204/20.0-uf-400-vdc-polypropylene-capacitor/1.html

jr@mac

That is also a good price.

Nicholas_23

Enlighten me , why dual leads? 

D1PP1N

Its the split-fire sparkplugs of caps. 

jr@mac

It caps twice as fast. Actually, I think there might be a non-audio application for voltage dividers, timers, or other stuff that capacitors are good for. Or they may just expect people to break one lead off. Or maybe we are now getting to the point where we bi-wire drivers. 

Wolf

It's a slightly different construction. It's called a Kelvin connection:

http://www.claritycap.co.uk/images/t...-capacitor.jpg

That aside- I have used these caps before, like them, and noticed no negatives. It's basically an interleaved dual-wound capacitor, not unlike the Mundorf Supreme, Audyn Plus, or Jantzen Z-Sup/Silver.

To quote Rayma from DIYaudio:

These are intended for high current, high frequency power electronics, where
Kelvin connections are often used, even in power semiconductor packaging.
A new package with kelvin source connection for increasing power density in power electronics design - IEEE Conference Publication

jr@mac

Kelvin connection is used for accurately measuring very low reactance, but not much in the literature on applications beyond that. Unless there is a feedback circuit involved, no benefit is gained from a Kelvin connection. 

Wolf

All I'm saying is that it's double wound as illustrated, and therefore, non-inductive.