Potting compound

[Orrin Iseminger]

I'm re-winding an antique coil that was used in the low tension
ignition system for a very early internal combustion engine. The
original was embedded in a potting compound consisting of tar. It has
aged and at room temperature more closely resembles brittle hard coal.
There's nothing soft and "tar-ry" about it.

I will be using a plastic bobbin for the new coil. Because the old
tar has a fairly high temperature melting point, I'm afraid to re-use
it for fear of melting the bobbin.

That brings me to my questions:

1) Where can I obtain for a reasonable price a small quantity of
potting compound, say, a pound or two? It can be thermosetting or an
epoxy type. I would much prefer something that can be melted and
poured our of the cannister, should re-winding ever become necessary,
again.

2) Where can I obtain Glyptal, either in quart quantities or in spray
cans? I'd like to give each layer of the coil a coat of Glyptal as
I'm winding.

Thank you.

Orrin Iseminger
Colton, Washington, USA
http://users.moscow.com/oiseming/lc_ant_p/index.htm
So many projects. So little time.

 

[Al]

In article <60ic21dn7ite9ulpsfon26pfhfglo9e9vr@4ax.com>,
Orrin Iseminger <oiseming@moscow.com> wrote:

1) Where can I obtain for a reasonable price a small quantity of
potting compound, say, a pound or two? It can be thermosetting or an
epoxy type. I would much prefer something that can be melted and
poured our of the cannister, should re-winding ever become necessary,
again.

For this purpose I would use beeswax. That is if the temp. that the coil
will be exposed to will not melt it.

Al

 

[CWatters]

"Orrin Iseminger" <oiseming@moscow.com> wrote in message
news:60ic21dn7ite9ulpsfon26pfhfglo9e9vr@4ax.com...

1) Where can I obtain for a reasonable price a small quantity of
potting compound,

I think they have some at... http://www.mouser.com/

 

[Orrin Iseminger]

On Thu, 03 Mar 2005 14:19:13 GMT, Al <no.spam@wanted.com> wrote:

In article <60ic21dn7ite9ulpsfon26pfhfglo9e9vr@4ax.com>,
Orrin Iseminger <oiseming@moscow.com> wrote:



1) Where can I obtain for a reasonable price a small quantity of
potting compound, say, a pound or two? It can be thermosetting or an
epoxy type. I would much prefer something that can be melted and
poured our of the cannister, should re-winding ever become necessary,
again.


For this purpose I would use beeswax. That is if the temp. that the coil
will be exposed to will not melt it.

Al

Outstanding idea, Al. Now that you mention it, I just unwound a coil
that had traces of beeswax on it. Thanks.

Orrin