Graphite Tape

[Op04]

Does anyone measure resistance for this graphite tape? Can it use for coil shielding?
for example

[mungos]

What is this graphite tape used for?

[Op04]

What is this graphite tape used for?

Hi,
I don't know the actual use of the material, but since it's graphite I'm curious about its resistance if it can be wrapped around a coil for shielding

[dbanner]

Hi,
I don't know the actual use of the material, but since it's graphite I'm curious about its resistance if it can be wrapped around a coil for shielding

There is also the non corrugated tape with adhesive backing of various widths and thicknesses. It could be ideal for wrap shielding coils. Maybe you can ask for some sample pieces of various thicknesses to be sent out to you. Then you can measure and carry out some experiments.

Or request some more technical details on the graphite composition.

[Op04]

There is also the non corrugated tape with adhesive backing of various widths and thicknesses. It could be ideal for wrap shielding coils. Maybe you can ask for some sample pieces of various thicknesses to be sent out to you. Then you can measure and carry out some experiments.

Or request some more technical details on the graphite composition.

Hi,
Thanks.. I was hoping instant info on this if any of member have experience with this kind. I guess I just have to order one first anyway

[Altra]

This one looks good. If I read the specs correctly? 25mm×25mm = 9.5 ohms?

https://www.agarscientific.com/carbo...adhesive-tapes

[Op04]

This one looks good. If I read the specs correctly? 25mm×25mm = 9.5 ohms?

https://www.agarscientific.com/carbo...adhesive-tapes

I think its not graphite it is carbon conductive which differs from graphite, like it said 9.5 ohm very impressive, thanks for the links!

[Altra]

Graphite is a crystalline form of carbon. So it could be semantics?

I looked around some more. This tape is used to hold samples for scanning electron microscopes SEM. I want to buy a roll to test. If you Search "SEM conductive tape" it results in more hits.

[Op04]

Graphite is a crystalline form of carbon. So it could be semantics?

Most important is hopefully this thin material whether its carbon or graphite give best result for shield without sacrifices depth detection (which driving me nuts ). I saw Nokta shield on their VLF coil it was dark black, whilst ML coil shield colored grey like. This tape will surely reduce time for coil making.

[Altra]

I have used three different brands of shielding paint. Acheson, Y-shield and Stewmac .Acheson and Y-shield are water based and dry with a gray color like pencil lead. The Stewmac guitar shielding drys dark black. They all work well.

The tape would reduce time for sure. I have used the metal based tapes like the 3M copper mesh suggested by BBsailer and another tape by Eric Foster. They work but are detected as metal and distort the early signal.

[Op04]

Guitar shielding type is stil the best despite the process. There are fakes 3M scotch mesh shield, must aware. I have use it (the real one), I personally don't like it, hard to explained it loses depth, next perhaps I will report here when I use that tapes how it perform

[Pete61]

I dont use anything that my Nupi PP can detect, that means no aluminium or copper tape, no CF braid either.

Best I have found so far is to mix graphite powder with polyurethane wood floor varnish.

1st brush on was about 75KΩ
2nd was about 25KΩ
3rd was about 12kΩ and dried out after a few days, was about 1.6kΩ.

[Altra]

I admire you guys who make your own graphite paint. But for myself, I'm not going risk all the time and materials on homemade paint that could fail at any time. Once the expensive epoxy cures there is no practical repair path.

[bbsailor]

I have used three different brands of shielding paint. Acheson, Y-shield and Stewmac .Acheson and Y-shield are water based and dry with a gray color like pencil lead. The Stewmac guitar shielding drys dark black. They all work well.

The tape would reduce time for sure. I have used the metal based tapes like the 3M copper mesh suggested by BBsailer and another tape by Eric Foster. They work but are detected as metal and distort the early signal.

If you want to use Scotch24, the wire mesh shield, try installing it this way.
1. Conceive the wire coil bundle being the letter “o”.
2. Conceive the Scotch24 shield being the letter U with the o being inside.
3. If you bend over the upper part of the U to make the coil shield, the overlapped portion will make conductive contact and, as you mentioned, may distort the early signal.
4. The proper way to use Scotch24 is to cut the Scotch24 only wide enough so there is no conductive overlap. Another way is to lay electrical tape over the overlap so there is no conductivity contact of the overlapping wire mesh.

The benefit of using Scotch24 wire mesh is the reduction of surface area with results in a higher self resonant frequency compared to using a solid shield like foil. Look up my article fastcoil.pdf on this web site to see more details. Anything you can do to make the coil have a higher self-resonant frequency will indicate less coil seen capacitance and the ability to use a higher value damping resistor for potentially earlier sampling.

I hope this helps.

bbsailor, Joseph J. Rogowski

[Altra]

Thanks for the tips Joseph.

I will try your u method with the electrical tape isolation. The carbon tape is still something to be investigated. It should have less generated eddy currents than copper mesh.