IDX-PRO+VDI

[Fabian]

Fabian you have one little mistake on your board. R3 need to be conected for other side of R4.
Regards

Thanks Strujas, You´re right. I corrected it already.

Regards

[silverdog]

RX cap can be critical to tune up closely.
Generally it is close to 0.033 (33nF). But if you put just 33nF that will not do.
Better put 22nF + .... in parallel , close to 33nF..
Be patient and give it chance, try to tune it as closest as possible.
Once tuned - hell of detector !
Deepest from all hand made presented here on Geotech forums.. no competition at all!

Just obtained one of these Fisher coils, I measured TX=1mH RX=6.98mH
How do I calculate the correct caps ?

[mikebg]

Just obtained one of these Fisher coils, I measured TX=1mH RX=6.98mH
How do I calculate the correct caps ?

Silverdog, what is resistance of TX and RX windings in your Fisher coil?

[kliner]

Capas for Fisher

Silverdog
In one of Ivconics mails he says what values of capa to use with the Fisher coil

[eduardo1979]

For Fisher 27cm search coils; RX-capacitor=33nF and TX-capacitor=330nF.Regards!

[silverdog]

Silverdog, what is resistance of TX and RX windings in your Fisher coil?

I'll measure resistance when I get home tonight

I tried Ivconics 330nF and 33nF, it didn't seem to be right
Is there a scope picture on here somehwere that will help me set RX correctly ?

[selim]

idx



http://www.youtube.com/watch?list=HL...&v=5GMUBa5MJ2k

[Jose]

I'll measure resistance when I get home tonight

I tried Ivconics 330nF and 33nF, it didn't seem to be right
Is there a scope picture on here somehwere that will help me set RX correctly ?

Hello Silverdodg
Here is a photo of the cancellation coil, my IDX_PRO
RX seems to work best near 90 degrees as in the photo.
16 volts for TX, 2 volts for grid
+ or - 150 mV for RX, 50 mV per grid, pin 6 of 5534.
Greetings Jose

[shansov]

eduardo 1979 What are the parameters of the coil ?

[silverdog]

Silverdog, what is resistance of TX and RX windings in your Fisher coil?

I have TX 1mh 6ohm RX 6.98mH 30ohm

[Wiltran]

EDU two tone board

Has anyone got the EDU IDX pro two tone board working? Mine works ok for steel- deep tone, but when I try non ferrous such as a penny, quarter or dime I get one half the depth that i got before and terrible static.http://www.geotech1.com/forums/image...milies/mad.gif

[shansov]

selim. Resistor value U2?

[eduardo1979]

selim. Resistor value U2?

Resistor=100K

[shansov]

Thank you.

[eduardo1979]

You're welcome.