Capacitors for new construction

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Capacitors for new construction

Postby battradio » Wed Jan 14, 2015 6:54 pm

http://www.mouser.com/ds/2/315/EZP-E-298528.pdf
http://www.mouser.com/ProductDetail/Pan ... 252bEXg%3d

http://www.mouser.com/ds/2/427/mkp1848c ... 269412.pdf
http://www.mouser.com/ProductDetail/Vis ... 2bWw%3d%3d

I was looking at mouser today and came across these 50UF caps at 500 and 900 wvdc for only $12.61 each , and thought what a low impedance power supply they will make for a new build , i was looking for cathode bypass caps for a 300B amp i'm building , the last ones i bought were over $26 for 250 volt speaker crossover caps .

Will be using these in my next build as power supply and cathode bypass caps

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The start of a 300B PP amp
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Re: Capacitors for new construction

Postby Geek » Wed Jan 14, 2015 11:02 pm

Nice find! (y)

For those preferring Digikey, the part numbers are: P15862-ND and BC2874-ND
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Re: Capacitors for new construction

Postby dcriner » Sat Jan 17, 2015 5:35 pm

Using those biggies as filters in a power supply might cause massive currents at turn-on, possibly zapping the rectifier tube. Most rectifier data sheets specify a maximum cap value for at least the first cap in a C-L-C filter.
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Re: Capacitors for new construction

Postby Geek » Sat Jan 17, 2015 10:32 pm

Thanks for the heads up!

All the more reason for a CL90 or other surge protector on the line side of the transformers.

Cheers!
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Re: Capacitors for new construction

Postby battradio » Fri Jan 23, 2015 5:40 pm

i ordered 16 of the Vishay 50UF at 900 volts , and 10 of the 1 uf 900 volt caps .will use them in my latest build and 6 of them updating a heathkit W-5M , so i can get rid of all the series caps in the power supply
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