COIL DD,PULSE INDUCTION??

[carlrod49]

these, links, are, correct? for one-coil .DD,PULSE-DETECTOR.... so how are connected, the terminals of the 2 +2, the 2-coils?

[Carl-NC]

Connect each coil separately... 2 pins for the TX, 2 pins for the RX. Don't forget the shield.

[kt315]

reply on your e-mail

carlrod, sorry I an not able to help in that matter. I am not Robert Hoolko... I did not build DD coil for PI. my english is also very poor to write strange big posting, with those numerous o-scope diagrames and phase pixes. I am able to appreciate only schematics' language. open this link and read for first those posts, hope you will build all you had planned of...

http://www.findmall.com/search.php?3...,match_threads=

[ghaj]

Mono Loop

Connect each coil separately... 2 pins for the TX, 2 pins for the RX. Don't forget the shield.

Hi Carl. How is the connections for mono loop? 1 for main loop current (TX), 1 for loop current return (RX), and 2 for shield TX and RX? To which voltage levels the shield connections should be connected? +Vb or -Vb?

[Carl-NC]

I'm not sure I understand the questions... a mono loop only has one coil with 2 connections, plus a shield which is usually connected to the common side of the coil.

[Mechanic]

Hi Carl. How is the connections for mono loop? 1 for main loop current (TX), 1 for loop current return (RX), and 2 for shield TX and RX? To which voltage levels the shield connections should be connected? +Vb or -Vb?

Hi Ghaj,

For a double D your tx coil hooks up to the transmitter, damping resistors and the other to ground(batt+) one side of your receive coil also hooks up to ground(batt+) and the other to the input to your receive fets. There is also a damping resistor required on the receive coil to damp it as it is not hooked up to the damping resistors in your detector. The shield is connected to coil gnd(bat+) of your transmit coil. Use a separate coax for your tx and rx coils and join the ground at your detector plug. Make sure you use low capacitance coax.

I hope this helps.

Cheers Mick