Shield

[ripsdevala]

Just experiment with battery black powder and some glue, what is good resistance value for the graphite?
What if i mix it with resin filler as screen?

[CDI]

Just experiment with battery black powder and some glue, what is good resistance value for the graphite?
What if i mix it with resin filler as screen?

I have about 1K per cm. Seem's good for SMW and IDX.

[Koala]

Just experiment with battery black powder and some glue, what is good resistance value for the graphite?
What if i mix it with resin filler as screen?

Graphite / resin doesn't work none conductive
Graphite / rubber glue also fails none conductive


PVA and Yacht varnish both work okay

[kt315]

Graphite / resin doesn't work none conductive
Graphite / rubber glue also fails none conductive


PVA and Yacht varnish both work okay

how work bitumen varnish?

[ripsdevala]

With white glue for woods i get 10k-30k/cm is this good enough?

[Koala]

With white glue for woods i get 10k-30k/cm is this good enough?

If that's measured on the surface it will be less at the bottom


I place some copper slug tape on card then solder a tap wire to it and paint the graphite/pva over the top.

[Koala]

how work bitumen varnish?

Sorry no idea never tried it.

[6666]

Sorry no idea never tried it.

He may mean this ?
https://www.bunnings.com.au/ormonoid...paint_p0961345

[Koala]

He may mean this ?
https://www.bunnings.com.au/ormonoid...paint_p0961345

Never tried it so no idea.

Seems something's work fine and others stay open circuit. Thought it was as a solvent evaporated forced the particle closer together but tried a few solvent based glues some work some don't. Settled on PVA as cheap. Mix to a stiff tooth paste. Dries very quick. Resistance goes down after 24 hours.

[kt315]

PVA kills conductivity, i wrote about that many times.

[Koala]

PVA kills conductivity, i wrote about that many times.

A fair stiff paste comes out with a resistance of 1K per square after 24 hours of drying. Spread it on the card with the back of a spoon.

Works well enough in the field on both my Bandido and IDX coils

[Goaty]

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

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

I noticed that this is also available as sheets of conductive cloth.

https://www.ebay.com.au/sch/i.html?_...bric+&_sacat=0 (scroll down towards the bottom of the list)

Has anyone tried this for shielding coil housings?

How would it compare with graphite coatings?

[kt315]

i do not use it. i just gave a link, not recommended. i use graphite spray.

[Goaty]

Has anyone measured the ohms per square of this material?

[Krzychu_]

After many trials, my experimental mixture contains a colorless acrylic water-proof lacquer and powdered graphite in a ratio of ~ 35g / 100ml, the layer resistance after complete drying (2 ... 3 days) is between 1kOhm and below 500 Ohm / cm. I support the screening path with a thin layer of carbon fiber over the entire length. Of course, remember about the gap in the screen, not to "complete turn" not short in which induce power and lose energy field. Paint should be "thick", but evenly possible, without returning the special attention to the details that are more important to obtain the desired effect.