TDI coil pin out

[Mark-VA]

Thanks GEO

Thanks for the picture, very informative

[kt315]

thank you Geo. do you see some resistor/-s in the coil or nothing more?


can you send me pic of high resolution under SUN light?

[Mark-VA]

Thanks for the picture, very informative

I must add some additional information.
I remember the guy stating he had the same coil on an auction site, so I searched and my thoughts were correct, he removed the tag and told me it was an OZ mono coil.

See picture of the coil he had for sale.

[Geo]

Hi KT...
I can't take more photos because i closed the house (it is glued ).
Take what i have....

[Geo]

more.....

[Geo]

more....

[Geo]

I must add some additional information.
I remember the guy stating he had the same coil on an auction site, so I searched and my thoughts were correct, he removed the tag and told me it was an OZ mono coil.

See picture of the coil he had for sale.

As i remember the oval coil (Razorback, Miner John) is a mono coil not a DF.

[kt315]

thank you much Geo. what the resistor does is not clear for me but maybe as over damping for inner coil.

[Geo]

If will find any notes will inform you.....
Yes it is damping for the inner winding.

[Jose]

According to the patent for dual field coils, the internal coil must have a resistance to prevent oscillations.
In this case, it appears to be 4700 ohms

[eclipse]

This is some thick wire they use! And thick insulation too!

[Mark-VA]

Whites coil to right

I must add some additional information.
I remember the guy stating he had the same coil on an auction site, so I searched and my thoughts were correct, he removed the tag and told me it was an OZ mono coil.

See picture of the coil he had for sale.

[kt315]

This is some thick wire they use! And thick insulation too!

enough wire and enough insulation. no thick.

[Geo]

If will find any notes will inform you.....
Yes it is damping for the inner winding.

KT...finally the resistor is 4k7 as Jose wrote.

[kt315]

thank you Geo.