Shield

[CDI]

Just a quick question about coil shield...
If i paint with graphite bottom and top coil cover, do i need to leave gap?

[bandito]

see here

[dfbowers]

Just a quick question about coil shield...
If i paint with graphite bottom and top coil cover, do i need to leave gap?

Probably not.. I leave a gap anyway but cannot tell any difference using " Blaster" brand spray graphite. It's not quite as conductive as nickel spray.
Don..

[kt315]

Don, can you give me a link on unexpensive nickel spray? TIA

[dfbowers]

Don, can you give me a link on unexpensive nickel spray? TIA

MG Chemicals "Super Sheild" is the only thing that comes to mind.. but not cheap.

[kt315]

thank you Don, seeking in google but see IMO its expensive even for US citizen.

[kt315]

main problem is where to get unexpensive silver powder. in mix with graphite powder that will give best result.
silver has interesting feature - its oxide is also an excellent conductor. so that why silver sufface in contacts is
not needed to clear.

[kt315]

http://www.ebay.com/itm/CONDUCTIVE-G...4H4B1wK6wJBLqw

CONDUCTIVE GRAPHITE SHIELD SHIELDING PAINT - REDUCES GUITAR HUM & BUZZ

[kt315]

http://www.ebay.com/itm/USA-CONDUCTI...YAAMXQdGJRz58l
USA CONDUCTIVE GRAPHITE Guitar Shielding Paint Glue w/ Conductive Paint

[kt315]

http://www.ebay.com/itm/Double-Sided...akSaeARqaFb15w

Double coating by high condutive copper and nickel in the surface of high strength polyester cloth and coating with self adhesive of high conductive Acrylic as well.
With excellent flexibitity, conduction, abrasion and high temperature resistant.
Popular choice for Phone, Tablet, Laptop LCD Cable EMI Shielding, keyboard Repair

[kt315]

http://www.ebay.com/itm/20M-One-Side...Db6ommHbF-hoUg

20M One Side Conductive Fabric Cloth Adhesive Tape Roll Shield Repair Tool EMI

[CDI]

see here
[ATTACH]37937[/ATTACH]

That's the same way i maked, but not with spray, i just maked myself graphite powder mix. First painted as bandito show in his picture, later when filled with epoxy resin i do one more layer, twist ground wire with graphite mix and final, add one more epoxy layer, maybe 1mm to cover shield.

[CDI]

Probably not.. I leave a gap anyway but cannot tell any difference using " Blaster" brand spray graphite. It's not quite as conductive as nickel spray.
Don..

Thank's Don, first time when i experimented with powder mix, it was with 1 cm gap. For IDX, work's much better than alu foil shield. Next coil i will try without gap.

[Koala]

Works fine without a gap with graphite/PVA mix

Thin 5mm coils thick are fine just top and bottom

Thicker coils need the edge doing as well otherwise wet grass becomes a problem.

[CDI]

Works fine without a gap with graphite/PVA mix

Thin 5mm coils thick are fine just top and bottom

Thicker coils need the edge doing as well otherwise wet grass becomes a problem.

Great thing is that how little graphite layer can make big difference.