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Old April 13th 10, 03:04 AM posted to rec.autos.makers.vw.aircooled
cletus
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Posts: 28
Default Rotor, without the 12 k-ohms resistance

WOW, Speedy Jim, WOW Great response! That exactly explains why my old (AM)
Mororola Radio sounded so good years ago, staticy now.


"Speedy Jim" > wrote in message
...
> rvirgin22 wrote:
>> .. Distributor rotors, without 12,000 ohms resistance
>>
>> 1) The original Bosch rotors, as recommended by VW, I believe
>> had 12,000 ohms, or was it 6,000 ohms of resistance across the
>> contacts... that being from the centre, out to the tip.
>>
>> 2) What I am finding these days (probably from China) is just a
>> straight through conductor with zero resistance.
>>
>> 3) Would love to hear feedback on what harm might come using
>> these newer type rotors built without the resistance.
>>
>> 4) I am guessing/hoping it would not overheat the coil, since the
>> proper Bosch coils have their own built-in resistance/ballast in
>> the primary windings to control the proper amount of primary
>> current in the primary windings... and thus control the proper level
>> of current in the secondary, going through the rotor. Secondary
>> current is always proportional to primary current, since that is the
>> only place the secondary circuit can get its electrical energy.
>>
>> 5) So I am hoping some of you might have some thoughts on
>> these newer rotors being found in the market missing the
>> 12,000 ohms, or 6,000 ohms of resistance.
>>
>> 6) Hope Speedy Jim is still on his computer since I know anything
>> electrical is definitely his specialty.
>>
>> Ross Virgin, Toronto, Canada
>> ..

>
>
> Ross:
>
> Resistors were added some years back to help reduce ignition noise
> in car radios. There were resistor plugs and resistor wires and
> resistor rotors.
>
> Radio noise is much less a problem today and many feel that any
> resistance in the HI tension circuit degrades performance.
> That's probably why you're seeing rotors with the resistor omitted.
>
> Some discussion he
> http://www.shoptalkforums.com/viewto...=99137&start=0
>
>
>
> Speedy Jim
> http://www.nls.net/mp/volks/
>



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