Tejon homebrew DD Coil

[ik5pwr]

Hi , I looking for homemade 5,75 " DD coil for my Tesoro Tejon ,any have a inductance for TX and RX coils?

[WM6]

Hi , I looking for homemade 5,75 " DD coil for my Tesoro Tejon ,any have a inductance for TX and RX coils?

I think it is the same as for Tesoro Lobo:

http://www.geotech1.com/cgi-bin/pages/common/index.pl?page=metdet&file=info/coils/index.dat

[ik5pwr]

it's different of a standard coil ? because my measurement was
20 mH and 1,5 mH

[porkluvr]

it's different of a standard coil ? because my measurement was
20 mH and 1,5 mH

Is 20mH the Tejon transmit coil or receive coil?

I would not believe the coil data listed for Lobo. I think the Tx and Rx are backwards but I don't know for sure.


http://www.geotech1.com/cgi-bin/page...oils/index.dat

[Mrand]

Parameters of 8x9" Tesoro Tejon coil are:
TX - 950uH / 4.3 ohm
RX - 15.8mH / 65.5 ohm
Phase TX / RX is 180 grad
TX coil work in Colpitts circuit with serial capacitors 100n and 1uF (inside detector). This give frequency 17.23kHz. Amplitude TX coil is about 22Vpp.
Mrand

[ik5pwr]

Thanks Mrand , so if I make a DD coil with this parameters they can operate ?

I take my measurement at the coil connector maybe it's different for a
error of my instrument.

I confirm a big inductance is RX section