Opened my tesoro widescan coil

[kt315]

my english does not give me possibility to do tutorials. i write here. yes, i use graphite aerosol but with adding of graphite powder.
this way gives significal economy because the balloon price is expensive (for me). instead 2-3 layers i put just one.
also one layer is cracking after drying.
if you do your own, seek silver powder or make the powder from silver. add it in graphite.

[cristiano.sar]

coil graphite layer somewhere touched a ground, grass or etc. and you get the beeping. you have to shield also a housing (with pcb and batt) inside.

One doubt about graphite shielding, when making our own graphite shielding, do you recommend using commercial graphite paints or making your own?
If making your own, do you have some tutorial of it?
Thanks.

[dbanner]

Yes, check to see if the rx is grounded at the coil end(shield), and put a longstanding question( beeping on wet grass)to rest.

[kt315]

coil graphite layer somewhere touched a ground, grass or etc. and you get the beeping. you have to shield also a housing (with pcb and batt) inside.

[cristiano.sar]

Thanks! Very interesting.
I opened the cover now, and theer is the final nulling loop.

An interesting thing is that in my coil the loop wire was not glued (it was loose inside the plastic cover), so may be the reason why this coil was beeping on certain movements or simply by touching it.

[kt315]

the plastic cover in a coil. Tesoro tech.

[kt315]

ok. we see some cover, plastic cover, at center of the coil. WHAT IS IT? i answer - ENDED PHASE of nulling process.
after epoxy filling you need still to NULL to 'ideal' coil state. SLIGHTLY yet.
open the cover... look... learn something new guys for yourself...

[cristiano.sar]

Today I opened the bottom of my Tesoro Widescan 11"x8" coil
I removed a layer of a rubber like material (I'm not sure if its resin, but if it is, it is a little flexible) and between this layer and the other (the harder one that contains the coils), there is a thin layer of a carbon like material (maybe graphite), with a resistance of about 9.5k, between a distance of 1.5cm.




I will try to dissect the rest of the coil to see the wiring.