Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#367635 05/01/16 02:01 AM
Joined: Aug 2007
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rusted Offline OP
Shade Tree Mechanic
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Shade Tree Mechanic
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Hi,
Is there any particular type of condenser I should use on the 6 volt coil?I have a handfull of different ones,some have different numbers on them?

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rusted #367636 05/01/16 02:49 AM
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A condenser controls the direction of erosion on the points. Due to the short trips of driving we do with these older cars, it really doesn't make much difference as to the value of the condensers. If you see excessive transfer of material from one point to the other, change the value of the condenser and check the action.


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rusted #367654 05/01/16 11:01 AM
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Shade Tree Mechanic
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Hello all,

empirical values shows something between 0,20 microfarad and 0,26 microfarad
mostly 0,22 µF for the ignition capacitor of a combustion engine.

Condensor erosion | capacity - variability


Is there anyone who can confirm what's shown in the above graphic ?

THX
have a nice day !

rusted #367658 05/01/16 12:29 PM
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According to the literature that I have, the condenser value should be between .18 and .22 microfarads.

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Oh, one direct match - not so bad beermugs

but I asked about someone's experience about the changing peaks on the contact (+)(-) if you run with an low or high capacity condenser ?

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That is an exact description, or visual, of what happens. Don't know how it could be depicted in a better way.


Agrin devil


RAY


Chevradioman
http://www.vccacolumbiariverregion.org/



1925 Superior K Roadster
1928 Convertible, Sport, Cabriolet
1933 Eagle, Coupe
1941 Master Deluxe 5-Passenger Coupe
1950 Styleline Deluxe 4-Door Sedan
1950 Styleline Deluxe Convertible
2002 Pontiac, Montana, Passenger Van
2014 Impala, 4-Door Sedan, White Diamond, LTZ
2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ

If you need a shoulder to cry on, pull off to the side of the road.
Death is the number 1 killer in the world.


Joined: Jun 2009
Posts: 42
Shade Tree Mechanic
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Shade Tree Mechanic
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Posts: 42
Hi,

A - As we have already a tolerance capacity of something like (+20 / -10) percent (par value) it would be of interest, what value step do you need to change the peak location from (+)to(-) or vice versa ?

B - Good or bad - it's not so easy ! Lets have a look on page 3 at the table #3 !
Very tricky the old coil paper condensers, especially #10 and #5 if they run on an higher temperature.
You will measure hardly a change in capacity and isolation resistance at room temperature (20°C),
but a very significant change in capacity and resistance at 100° Celsius ( boiling point of water )

C - Today's first choice > Metallized Polyester Capacitor | Polyethylene-terephthalate (PET)
Reliability: Operational life > 300000 hours at +85°C
(+125°C permitted for 1000 hours max. distributed over the entire operating life)


Have a nice day !

rusted #371264 07/02/16 03:29 PM
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Shade Tree Mechanic
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Condensers are the same for 6V and 12 V


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