"Inductor Dope"?

floid · Post by **floid** » Fri Oct 21, 2011 9:15 am

i'm trying my hand at an old 40s era project i ran across, and it requires you to wind your own inductor - i'm clear on everything except "Inductor Dope," which they claim can be had at any electronics shop...

JGriffin · Post by **JGriffin** » Fri Oct 21, 2011 11:03 am

I recall that "dope" was a substance used in making dirigibles...they smeared it all over the Hindenburg, for example.

Scodiddly · Post by **Scodiddly** » Fri Oct 21, 2011 4:38 pm

Something like wax or epoxy... like potting pickups, most likely. Keep the windings from vibrating.

AndyHutchinson · Post by **AndyHutchinson** » Fri Oct 21, 2011 7:10 pm

Where'd you find this project, if you don't mind my asking? It sounds interesting

Mr. Dave · Post by **Mr. Dave** » Fri Oct 21, 2011 10:04 pm

Look for insulating varnish, like this stuff:
http://www.alliedelec.com/search/produc ... KU=7960068

Scodiddly · Post by **Scodiddly** » Sat Oct 22, 2011 7:02 am

Mr. Dave wrote:Look for insulating varnish, like this stuff:
http://www.alliedelec.com/search/produc ... KU=7960068

Good call.

Jim Williams · Post by **Jim Williams** » Sat Oct 22, 2011 8:20 am

The red stuff is called Q dope. Get it from Fry's. I prefer polystyrene dope myself. It's used to secure windings on coils and to insulate high impedance nodes like condenser mic capsule connections, etc.

floid · Post by **floid** » Mon Oct 24, 2011 7:23 am

http://www.hmcelectronics.com/product/G ... leshopping
is this the poly dope you're referring to, Jim?
So, when using this stuff, i just do my coil and then brush a layer on? Any advice for securing the winding until everything sets up?
AndyHutchinson, this is the joint: http://www.tubebooks.org/technical_books_online.htm
thanks all

Message Board

"Inductor Dope"?

"Inductor Dope"?

Who is online