t/r help

[mesy64]

Hello to all friends
I would like to create a t / r for
But I do not know about this metal detector coils
COILS information (number of wires around size and grade coil wire) and t1-t2-t3 and rfc in the source but because I'm not good in English they can not find
Please I can help the amounts requested
With respect
mesyna

[WM6]

this is one loop from 4 wire cable (4 turns) coil

[mesy64]

this is one loop from 4 wire cable (4 turns) coil

tank you wm6
Hello
I instead I t1 to t3 (IF) used in the radios to use?



mesyna

[WM6]

I instead I t1 to t3 (IF) used in the radios to use?

Those are bifilar wounded 36 turns (34 AWG enameled magnet wire) on Indiana General "Q-1" CF101 (this is an old part No. newest part No. is F303-1) core.

"Q1" mean ferrite material used, Palomar equivalent "61", Stackpole Equivalent "C/11", Ferroxcube equivalent "4C4", other equvalent permeability u=125.

You can use substitute from Palomar core F-23 (outer diameter 0.23", inner diameter 0.12", core thickness 0.06") with same dimensions as CF101 or F303-1.

[WM6]

like this:

[detectoman]

hey mesy64 i heard you cant find A13, i think sustitute for these is too A12 this is darlington , regards