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•Transmit Coils •Receive Coils •Transmitter Electronics •Receiver Termination Electronics •Coil Assemblies Outline

Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

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Outline. Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics Coil Assemblies. Transmitter Coils X,Y,Z. X:Outer Vert coil is 36 turns # 12, 2.86 mH . and the coil is 6.5 lbs. and 37 3/4" x 28”. Y: Inner Vert coil 3.1 mH, 36 turns #13, 3.1 mH . and - PowerPoint PPT Presentation

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Page 1: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

•Transmit Coils•Receive Coils•Transmitter Electronics•Receiver Termination Electronics•Coil Assemblies

Outline

Page 2: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

X:Outer Vert coil is 36 turns # 12, 2.86 mH. and the coil is 6.5 lbs. and 37 3/4" x 28”.

Y: Inner Vert coil 3.1 mH, 36 turns #13, 3.1 mH. and the coil is 6.4 lbs .and 37 3/4" x 26 3/4”.

Zs:H coil Upper 1.4 mH, 22 turns #12, 1.4 mH H coil Lower 1.4 mH, 22 turns #12, 1.4 mH H coils series, adding 3.0 mH, 44 turns #12 Horizontal coils weight is 16 lbs. , coils and frames are 39 1/8" square.

Transmitter Coils X,Y,Z

Page 3: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

1

Pin3

V1

TD = >10 uS

TF = <1 uSPW = >10uSPER =

V1 = Pase 1 Pulse

TR = <1 uS

V2 =10Volt

Pin1

AnodeSCR1 30TPS15

4

L Load Hi

4

Pin2

L Load Lo

2

Battery Neg

TS1-1

Pin2

6

V2

TD = >10 uS

TF = <1 uSPW = >10 uSPER =

V1 = Phase 2 Pulse

TR = <1 uS

V2 = 10Volt

R4 gate50

TS1-3

TS1-4

Pin3

Pin2

V124 Vdc

Battery Pos

Pin3

2

Pin1

D1B

FEP16JT(fast)

R term

3400

Trigger BNC Hi

Pin1

Pin1

Pin1T3coupled

in2out1in1out2out3in3

R1 gate50

L1 Trans Coil

3 mH

6

5

AnodeSCR2 30TPS16

Pin2CathodeSCR4 30TPS16

T3coupled

in2out1in1out2out3in3

3

TS1-2

D1A

FEP16JT(fast)BNC Shield

Pin3

1

R2 gate50

R3 gate 50

Pin2

3

C Load4 mF 1000V

12

Trigger BNC Hi

CathodeSCR3 30TPS16

Pin3

5

Transmitter Pulser Schematic

Page 4: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics
Page 5: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

Transmit Coils

Page 6: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics
Page 7: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

•6” inner radius, 3/4” wide, 500 turns #26 formvar wire, wound on a Delrin spool.

•The Resistance is 35 Ohms, the Inductance is ~70 mH., the uncompensated ring frequency is ~65 kHz., terminated with 10 foot shielded twisted pair.

•The R/C network is tuned to ring at 15 kHz. and is critically damped.

•An aluminum foil/ fiberglass tape is insulated/layered and provides a non-shorting shield.

•An additional tape layer is the final covering. •The coil ties to a 3 pin plug:1-shield, 2-coil inner lead, 3-outer coil lead.

Receive Coils (16 total)

Page 8: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

Coil Termination Network

R6

Shunt

C1C

Pin 3

Pin 1

75pF

C6

Pin 2

C2C

R2

4.3K

Top Coil L1

70mH

Shield

Pin 3

Pin 2

R1

3K

Shield

Pin 2

L270mH

C4

35-300pF

Oin 1

R4

1K

+/- 200Volts P-P

Bottom CoilDiagonal

75pF

C5 C3

35-300pF

R5

Shunt

Pin 1

Pin 3

R31K

Page 9: Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics
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