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RFI Capacitor Values ID'd

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Old Oct 22, 2024 | 02:26 PM
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From: Loud, Raw and Dangerous 1968 327 4S in Southern California
Default RFI Capacitor Values ID'd

Had the dash apart and noticed two RFI capacitor that looked like they had been on the car from the factory. After cleaning off the layers of dirt they were marked as follows:

Back of gauge panel.
ZB 173
.47 MFD
100 VDC

Connected to turn signal flasher module connector behind lower dash panel on passenger side.
ZB 172
.47 MFD
100 VDC

Both marked with a logo that looks like CDE (Cornell Dubilier Electronics). Not sure about the 173 and 172 difference....maybe a date code. No markings for polarity so they are most likely non-polarized. Will look for replacements but not many axial lead capacitors available these days...not ready to pay $20+ yet for what should be under $5.






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Old Oct 22, 2024 | 02:28 PM
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Originally Posted by Redvette2
Had the dash apart and noticed two RFI capacitor that looked like they had been on the car from the factory. After cleaning off the layers of dirt they were marked as follows:

Back of gauge panel.
ZB 173
.47 MFD
100 VDC

Connected to turn signal flasher module connector behind lower dash panel on passenger side.
ZB 172
.47 MFD
100 VDC

Both marked with a logo that looks like CDE (Cornell Dubilier Electronics). Not sure about the 173 and 172 difference....maybe a date code. No markings for polarity so they are most likely non-polarized. Will look for replacements but not many axial lead capacitors available these days...not ready to pay $20+ yet for what should be under $5.

Do you listen to AM radio alot? If not you don't need them. Otherwise try Mouser Electronics.
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Old Oct 22, 2024 | 02:42 PM
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From: Loud, Raw and Dangerous 1968 327 4S in Southern California
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Originally Posted by MelWff
Do you listen to AM radio alot? If not you don't need them. Otherwise try Mouser Electronics.
The one on the back panel of the gauge panel makes me wonder if it was to keep the battery meter from jumping around. However after 56 years likely no capacitance was left anyway.
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