Capacitor usage - Printable Version
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Capacitor usage - snowm00se - 04-03-2017
can you use a metallized polypropylene film capacitor in place of a electrolytic capacitor? The metallized polypropylene film capacitor does not have a + or -. Would it make a difference how it would be hooked in to the circuit. I am working on a 37-116. I am new at this and to the Phorum and hope my question is ok.
RE: Capacitor usage - Mondial - 04-03-2017
Sure, you can use a film cap instead of an electrolytic. In fact I would recommend it for the first filter after the rectifier. The 4 or 8 uF electrolytics available today are not rated for the high ripple current of a vintage radio power supply, especially a big one like a 116 and will have a short life.
The film cap is non-polarized so you can connect it either way
RE: Capacitor usage - klondike98 - 04-04-2017
Welcome to the Phorum!
RE: Capacitor usage - snowm00se - 04-04-2017
Thanks for the info. I had ordered the metallized polypropylene film capacitor from antique radio and was about to return them because I did not know you could use metallized polypropylene film capacitors in place of electrolytic caps that had to be installed with a plus or minus connection.