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Slightly OT: What is the 'insulating oil?'Â In large, power grid
transformers, the insulating oil at one time was PCBs, a serious
carcinogen. A big deal was made about this decades ago, and I
assume--yeah, I know what 'ass-U-me' means--that those were replaced, at
least in newer versions (knowing PG&E, maybe not). I wonder if old,
oil-filled coils, which are essentially transformers, still might have
some PCBs in them, in which case they need to be treated with the
necessary concern. OTOH, although I've never deconstructed a Lucas
coil, some coils I've seen the internals of used heavy, oily paper as
the dielectric.
If you have a Pertronix (I) instead of points, and the distributor comes
to rest with the power transistor in the forward-biased state I'd guess
the Pertronix would fry first, though I've left my key in the run
position longer than I should have a couple times and, although the coil
got warm, the Pertronix survived.
Bob
On 4/25/2020 8:37 AM, John Harper wrote:
> Carl
>
> It depends on where the engine comes to rest. If contact breakers are
> open then is nothing to heat the coil. Version made at about the end
> of A-H production will heat up but should not burn up.
>
> One problem one might have is that a coil may be OK on test but after
> a few miles will fail. This is possibly because the insulating oil has
> leak out. This can happen very slowly and may not be noticed.
>
> Best regards
>
> On Sat, 25 Apr 2020 at 14:43, Carl Rubino <rubino@truespeed.ca
>
> How long can you have the ignition on without starting before the
> coil burns itself up.
> --
>
> Best wishes
>
> John Harper
>
> AHC UK 100 Register Secretary
>
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Slightly OT: What is the 'insulating oil?'Â In large, power grid
transformers, the insulating oil at one time was PCBs, a serious
carcinogen. A big deal was made about this decades ago, and I
assume--yeah, I know what 'ass-U-me' means--that those were
replaced, at least in newer versions (knowing PG&E, maybe not).Â
I wonder if old, oil-filled coils, which are essentially
transformers, still might have some PCBs in them, in which case they
need to be treated with the necessary concern. OTOH, although I've
never deconstructed a Lucas coil, some coils I've seen the internals
of used heavy, oily paper as the dielectric.<br>
<br>
If you have a Pertronix (I) instead of points, and the distributor
comes to rest with the power transistor in the forward-biased state
I'd guess the Pertronix would fry first, though I've left my key in
the run position longer than I should have a couple times and,
although the coil got warm, the Pertronix survived.<br>
<br>
Bob<br>
<br>
<br>
<div class="moz-cite-prefix">On 4/25/2020 8:37 AM, John Harper
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAL1OyxcsFPnE-=-LbWLEPqawnDjvkVAiZb4db6J4t-Hvi=EuGg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Carl
<div><br>
</div>
<div>It depends on where the engine comes to rest. If contact
breakers are open then is nothing to heat the coil. Version
made at about the end of A-H production will heat up but
should not burn up.</div>
<div><br>
</div>
<div>One problem one might have is that a coil may be OK on test
but after a few miles will fail. This is possibly because the
insulating oil has leak out. This can happen very slowly and
may not be noticed.</div>
<div><br>
</div>
<div>Best regards</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, 25 Apr 2020 at 14:43,
Carl Rubino <<a href="mailto:rubino@truespeed.ca";
moz-do-not-send="true">rubino@truespeed.ca</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div dir="ltr">
<div
style="font-size:12pt;font-family:Calibri;color:rgb(0,0,0)">
<div>How long can you have the ignition on without
starting before the coil burns itself up.</div>
</div>
</div>
</div>
-- <br>
</blockquote>
</div>
<div dir="ltr" class="gmail_signature">
<div dir="ltr">Best wishes
<div><br>
</div>
<div>John Harper</div>
<div><br>
</div>
<div>AHC UK 100 Register Secretary</div>
</div>
</div>
<br>
</blockquote>
<br>
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