[TR] Testing ignition coil: what am I doing wrong????

[Anthony Rhodes]

The failed original stabilizer had burned through some of the fine wire wire
coil. I attributed it to excessive voltage, but it was 37 years old so it
could have been time to fail

I ended up making my own voltage stabilizer using an LM2940-10 and the
required supporting parts on a homemade PCB all fitting in the same case as
the original VS


On Jun 17, 2012, at 1:36 PM, "Randall" <TR3driver at ca.rr.com> wrote:

>> My TR7 HEI unit has a capacitor (condenser) on it.  I suppose
>> it is possible
>> that it is failing.  Do you know if the HEI system requires a
>> condenser?
>
> As far as I know, it does not.  According to the book, the condenser is
only
> for radio noise suppression.
>
>> My old
>> original voltage
>> stabilizer failed, as did a transistor replacement!
>
> IMO the original would not likely be affected by transients.  Internally it
> is just a heater, and when the heater gets hot, it interrupts the power.
> But the solid state version could have been.
>
> On a side note, all of the instructions I've seen for electronic
conversions
> in an original VS box say nothing about bypass capacitors.  But I found
that
> mine would not regulate properly without them (likely indicating it was
> oscillating at high frequency).
>
> -- Randall