Where is the best place to get the capacitors for coil, voltage regulator, generator and amp gauge. Right now I just need them to be functional.
Larry
Larry
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Re: C1 capacitors
How are you going to tell if they're functional or not? Why do you care?
They're on EBay all the time. Usually go for around $35 apiece.
Sometimes you can buy the thing they're on for less than $35 on EBay. Once I bought a junky old incorrect generator for something else for less than $5. But it came with the correct capacitor. While shipping was expensive, it still came to my door for less than $20 all together. -
Re: C1 capacitors
I assumed they were on there for a reason. Other then judging, do I need them?Comment
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Re: C1 capacitors
They may help with radio noise. Check with jack Humphrey. I think he is leaving for Australia today or tomorrow, but he should be able to help you out with your capacitor needs.Comment
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Re: C1 capacitors
Most of the 'hush up' capacitors were intended to quiet switching/transient noise(s) at the source of the noise (v-reg turning gen on/off, coil cap discretely firing spark plugs, generator turning and creating harmonic 'rebound' noise components e.g. whine). Due to the unique fiberglass body of Corvette (no large steel stampings to create a Gaussian shield effect), some capacitors are specific to Corvette intended to keep noise from traveling the wiring harness leads and using them as 'antenna' to transmit stray noise.
Typically, the RF capacitor's noise suppression is most evident when listening to AM stations under fringe reception conditions. As most of our cars see 'weekend warrior' duty in major metro areas where received signal strength is pretty healthy, few miss the capacitors except on the judging field where point loss occurs.
Why not stick in 'any' old cap as one reply to this thread suggested? Well, the 'goodness' of a capacitor is measured in two ways: (1) how does it measure up to its rated storage capacity, mFd? and (2) how healthy is it at holding stored charge, leakage profile? Some can measure/confirm #1, but few consider aspect #2.
Storage capacity will change when internal storage plate planes short together. Leakage increases when the dielectric separating internal storage planes breaks down allowing unintended electron migration. If the component's leakage profile becomes TOO LARGE, you essentially wind up with component that's little more than a glorified short circuit.
Typically, the capacitors are attached between a noise generating source and ground (allows AC components of a given frequency profile a low impedance path to ground but blocks DC from taking that 'detour'). Consider how well the engine would run with a short circuit between the coil's primary terminal and ground!
Yes, there's a valid reason you don't want to use just 'any' old capacitor!Comment
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Re: C1 capacitors
I guess my question should have been, what could be used as a functional replacement without regard to judging?Comment
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Re: C1 capacitors
For starters Paragon catalogs the ignition capacitor for $10.00 replacement or $60.00 N.O.S. I would have to assume that the capacitors used on the voltage regulators were generic to GM of that Vintage, maybe not in appearance but functionality. The ones used under dash I do not know if other GM car lines used these or not, but suspect that they would since the noise generated by the ammeter, fuel sending unit, etc probably is not any different than a Corvette.Dick WhittingtonComment
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Re: C1 capacitors
The '580 v-reg cap was widely used on other GM passenger cars. Depending on year, the coil cap can also be found, but the '070 version used in '56-57 is RARE as hen's teeth! The '095 generator cap is also common to other car lines.
The wax foil '568 cap attached to the ammeter is NOT there for suppressing 'ammeter' noise as Dick Whittington suggests. It's there to suppress HEADLIGHT noise (transients associated with turning the headlights ON/OFF as well as changing from high to low beam mode). This cap will NOT be found in other GM passenger cars because its purpose was to keep the wiring harness lines to/from the headlights from 'ringing' and radiating through the fiberglass body components into the radio via the antenna (broadcast RF vs. conducted interference).
To understand the purpose of these caps, you need the Delco Radio repair manuals from the various years....Comment
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Now I know why the wax caps...
...are a little hard to come by. Thanks, Jack Take a ride on a Roo for me...Comment
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