Author Topic: Noise Suppression Capacitors Wiring  (Read 281 times)

Pawel66

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Noise Suppression Capacitors Wiring
« on: May 24, 2025, 16:08:10 »
Does anybody know why on old manuals (Beru one form the 50ies enclosed) the instruction was to to run a wire from given connector to the capacitor connector and then to the capacitor connector the actual wire from harness was connected?

In the enclosed manual it applies to all capacitors (all 3 from regulator and generator) except for the one to coil.

For all the capacitors - the capacitor is between the two positive connectors and ground, there is practically no resistance between the two positive terminals.

I do not like this way of connecting capacitors - we have another point between the source and the harness. It goes through the old wires.

Why is it not recommended to connect capacitor just in parallel, like I depicted in the enclosed drawing?

I spoke to a Bosch technician - he said noise suppression capacitors are just connected in parallel to the point they suppose to infuelnce.

Anybody can shed light on this?
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

mdsalemi

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Re: Noise Suppression Capacitors Wiring
« Reply #1 on: May 25, 2025, 15:30:04 »
Pawel,

Here is some information on identification and suppression of various kinds of electronic noise/interference in a car.

https://www.howacarworks.com/accessories/identifying-and-suppressing-radio-interference
Michael Salemi
Davidson, North Carolina (Charlotte Area) USA
1969 280SL (USA-Spec)
Signal Red 568G w/Black Leather (Restored)
2023 Ford Maverick Lariat Hybrid "Area 51"
2023 Ford Escape Hybrid
2024 Ford Mustang Mach Ex PEV

Pawel66

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Re: Noise Suppression Capacitors Wiring
« Reply #2 on: May 25, 2025, 18:12:28 »
Thank you, I have seen this when I did some research on this topic. This article shows two devices - a coil and a generator. Both are shown to be connected in parallel, like I would do it.

The Beru instruction I attached shows the same way of connecting capacitor for the coil , but a different way of connecting capacitor to generator and regulator. and this is what puzzles me....
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

 

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