Audio Research Dual 75 Capacitor Source?

[neddyboy]

There's a good chance I'll need to replace the filter caps on my ARC Dual 75. ARC wants $55 apiece for six, and $330 for caps is not in my budget right now.

Does anyone know where I could find some 600mfd 300V caps or close? I'm not sure of the name for the mounting type, but they're mounted on a circuit board with four twisted solder tabs. Three of the tabs go to ground and one is positive. They're cylindrical, about 1.25" wide by 6" long. Most are Cornell, one is Aero M. Since they have to squeeze between the transformers, I'm limited to that diameter or a little bigger.

I've checked Digi-Key and Mouser. Aero doesn't seem to make them any more.

Thanks,
Neddyboy

[Conrad Hoffman]

I think the style is called "twist-loc", and you can rest assured that ARC is buying them from some standard source, and marking them up by 2-5X or more. Try the remaining old line suppliers like Allied, Newark, and Future. I haven't been buying parts for a couple years, and the names change, but I think those two are still under the same names. They usually have people that are very good at finding things :-)

[neddyboy]

Thanks Conrad, I'll try those names.
Neddy

[Original Burnedfingers]

Is there a part number on the cap?

[ethermion]

http://www.mouser.com/search/Product...85-380-400V681

CD part # 380LQ681M400K052

1.18 inches by ~2 inches

680uf 400V

$8.91 each

15 in stock

[neddyboy]

Burnedfingers, they're Cornell Dubilier PFP Twist-Locs, part #UPNL92.

Ethermion, is the higher uF rating of the units at Mouser okay? Would that be higher filtration? I wasn't sure how high I could go with the rating.

Thanks,
Neddy

[Tom Bavis]

The four-terminal ones aren't as common as two-terminal twist-locks, but they're around - a smart designer would put in both footprints - I see that in many boards.

[ethermion]

Electrolytic caps are often +/- 20% or worse. 600uf to 680uf is roughly the same thing. You and the circuit will not notice the difference.