ETS-Lindgren 7606 Coil Antenna/Shielded Coil - Manual (Page 10)

About Model 7605
• Model 7605 is a 20-turn coil of AWG-12 enamel-insulated copper wire.
It is wound in a groove on a coil form made of a polytetrafluoroethylene
(PTFE) material. The average diameter of the coil is 12 cm (120 mm).
• The coil form is extended to provide a built-in 5-cm spacer to keep the
coil at the required distance from the EUT. A slot with a threaded
screw hole is cut into the end of the spacer to attach the Model 7606.
• The coil is used to expose EUT to magnetic fields in the range of 30 Hz
to 100 kHz. It produces a magnetic field that has a flux density of
9.5 x 10
7
picotesla per ampere (pT/A) of current flowing in it at an axial
distance of 5 cm (50 mm) from the center. In decibels, this is
160 dB(pT/A). The coil can carry 15 A rms (root mean square) of
alternating current with only ambient cooling.
About Model 7606
• Model 7606 is a 4-cm (40-mm) diameter, electrostatically-shielded loop
antenna with 51 turns of 7-strand AWG-41 litz wire.
• The Model 7606 is used to calibrate the Model 7605 and associated
instrumentation. It has a phenolic holder which mounts to the
Model 7605 to hold both windings parallel and coaxial to each other
with their centers precisely 5 cm apart. The holder of the Model 7606
has a 1/4–20 threaded hole to mount to a standard tripod.
• The Model 7606 is terminated in a BNC connector near the end of the
holder. For test setup calibration, the Model 7605 and Model 7606 are
fastened together with a 3/8–16 nylon bolt.
10 | Introduction