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