Power Supply Filter Caps?

Takeman

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I am working on a power supply (Exidy) and it has 2 6800uf 35v axial caps and 2 1600uf 16v axial caps. I am having a hard time finding an exact repalcement. I know that I can go up in voltage, but how critical is the uf? Can I go up to a 6800? what about the 1600, how high/low can I go?

Thanks
 
General rule of thumb with large power supply filters, is you can go up to 50% higher in capacitance. 1600uf is a rather odd value these days - next standard values would be 1800 and 2200, either of which should be fine. 6800 is a pretty standard value, you shouldn't have trouble finding that one, but you could go higher if need be.

-Ian
 
General rule of thumb with large power supply filters, is you can go up to 50% higher in capacitance. 1600uf is a rather odd value these days - next standard values would be 1800 and 2200, either of which should be fine. 6800 is a pretty standard value, you shouldn't have trouble finding that one, but you could go higher if need be.

-Ian


Yes, the 6800uF cap is a standard value. But, I'll bet his main problem is finding a supplier with 6800uF 'axial' caps. Lately, it appears that manufacturers are dropping axials. Nichicon (brand I use most often) has raised their prices by as much as 50% on axials in the past couple months. Just today, my special ordered 2.2uF, 50V axial caps increased in cost by more than 15%...and that's after they already went up by 15% when I originally placed the order. (Really sucks when they won't honor a previously quoted price) And, more and more values are available only as special orders. Quite often you see this sort of pricing/stocking occur when an item is being discontinued.

There are other quality manufacturers that make axials as well. And they seem to be doing the same thing.

Seems like we will all eventually be stuck with the Chinese caps such as Xicon's XAL series...pity.

Ed
 
Thanks guys, I was able to locate parts that should work. Got a 6800uf 35 v and a 22000uf 16v (I thought it was a 1600, but I missed a zero) Both were axial and reasonably priced.
 
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