[robert clausen]

I am a novice and working on a Stromberg Carlson 60L.

http://www.nostalgiaair.org/pagesbymodel/588/M0021588.pdf

I want to replace 5 paper caps and the one original multi cap aluminum electrolytic. They probably should have been replaced before now.

The paper caps aren’t an issue for me, it’s the electrolytic. It has a green wire – 8 mfd? which goes to the far right lug on the terminal strip, (photo enclosed), a red wire – 4mfd?, which goes to the middle lug of that same strip and a yellow wire – 4 mfd? which goes to the far left lug of that same terminal strip. There is an additional red wire shown on the enclosed wiring diagram that leads to the Audio Transformer Assembly. That wire is there and connected to the far left lug of the terminal strip.

I want to stuff the new caps in the original cylinder because it is too crowded under the chassis but I’m not sure if I have the proper caps associated with the correct wire colours listed above. Also I don’t know where the – connections of these 3 new caps would go. The aluminum cap has no markings on it and does not appear to have a isolating washer so I need some guidance with how to ground these caps properly.

Any assistance would be greatly appreciated.

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[garykuster]

delete reply

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[Les Dickson]

Hi Robert

• your 8 MFD electrolytic should have a green-red wire
• one of your 4 MFD electrolytics should have a black-white wire
• the other 4 MFD cap should have slate-red wire and a red wire

I’ve shown the wires in the attached image, you should be able to trace the routes I think.
Ground the three new caps exactly where the existing caps are grounded.
There is another electrolytic according to the schematic; P-24207 10 MFD C-25

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[robert clausen]

Thanks again Les for your help. The P-24207 electrolytic is no problem.

With the other multi-cap, I can trace the + lines ok. There are only the 3 wires coming from the can so I assume that these 3 caps are currently grounded to the can itself. If so and since I’ll be placing the new caps inside the existing can, can I run an insulated wire from the new caps -‘s to the chassis to ground them? There is no lug/ tab under the chassis on the existing can to solder too.

I know this is basic but I have trouble with multi cap electrolytics and I don’t want to mess up the polarity.

[Les Dickson]

I assume that you’re correct that the 3 electrolytic caps are grounded to the chassis. You can check by using a multi-meter to see if there is any resistance between the chassis and the container of the 3 caps.

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