View Full Version : Need help with cap


steve gibson
08-11-2005, 10:06 PM
Any thought on what I should replace this cap with? It is listed as "cap total 36"

approse
08-11-2005, 10:48 PM
Steve,
Strange way of puting it isn't it. No voltage listed?

Ron

Chad Hauris
08-11-2005, 11:13 PM
If this cap is used in a power supply of an old radio a 450 volt electrolytic should do. If it is the first cap off the rectifier some sources recommend no more than 40 mfd so probably a 10 and 22 mfd at 450 volts paralleled to give you 32 mfd.
If not directly on the rectifier cathode probably a 47 mfd at 450 volts.


Measure the voltage when you get the new caps in just to make sure that you are within the 450 volt limit...only thing I have seen higher than 350 or so volts in from this era is higher powered stuff like PA amps.

steve gibson
08-11-2005, 11:34 PM
Thanks Chad. I thought I would parallel two caps. My next question- There are three terminals. One is definitely power. Are the other two both neg? I have some 630 volt caps. Would these be better?

Chad Hauris
08-12-2005, 06:25 AM
What do the terminals connect to? if one connects to the can this is likely negative, if there are two on an insulator there may be 2 caps in the can. What would be best would be to get the schematic of the set and see where the caps are in the circuit.

approse
08-12-2005, 08:46 AM
Steve,

Guess the number of connectors would have explained the "totals 36" If you can't get a Sams on the unit can you at least run either cap checks or basic resistance? I realize it may be total lunch but doesn't hurt to check. Running out the leads will tell you wether it's a 2 or 3 (I suspect) cap unit.

Ron