A
Anonymous
Guest
Sorry no UPS babe in this message but did you see her over in the Explorer forum, dang! Anyway where was I...yes I thought I would share some pics of a 9 inch concentric coil I'm building for my Explorer, the old gal (my lab Explorer XS) is liking this coil so far.
As you can see I'm not done yet but the tough part is over thankfully, its a bear to build a coil for an Explorer.
This first pic is the inner coil, the windings are encased in resin, just enough to build some space between the windings and the shield, thats the shield drain wire hanging out there. I'll let it cure overnight then wrap the drain wire and apply some graphite shielding paint. This inner coil is then placed inside a shell and resin is poured once again sealing it all up tight.
<img src="http://coilbuilders.com/pics/9coil1.jpg" alt="" />
Here it is on the oscilloscope, its a thing of beauty how it balanced, the bottom square wave is the explorer transmit signal picked up off the transmit coil, that thick flat line on top is the receive coil, when balanced the receive coil will be flatline like this, when out of balance the receive coil will pick up some of the transmit coil's square wave signal. Those spikes you see are the result of no shielding and my nearby steel workbench and all the household electrical noise.
<img src="http://coilbuilders.com/pics/9coil2.jpg" alt="" />
I waved silver over the coil and the Explorer concurs!!!
As you can see I'm not done yet but the tough part is over thankfully, its a bear to build a coil for an Explorer.
This first pic is the inner coil, the windings are encased in resin, just enough to build some space between the windings and the shield, thats the shield drain wire hanging out there. I'll let it cure overnight then wrap the drain wire and apply some graphite shielding paint. This inner coil is then placed inside a shell and resin is poured once again sealing it all up tight.
<img src="http://coilbuilders.com/pics/9coil1.jpg" alt="" />
Here it is on the oscilloscope, its a thing of beauty how it balanced, the bottom square wave is the explorer transmit signal picked up off the transmit coil, that thick flat line on top is the receive coil, when balanced the receive coil will be flatline like this, when out of balance the receive coil will pick up some of the transmit coil's square wave signal. Those spikes you see are the result of no shielding and my nearby steel workbench and all the household electrical noise.
<img src="http://coilbuilders.com/pics/9coil2.jpg" alt="" />
I waved silver over the coil and the Explorer concurs!!!