QEX Article Coil Data

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Original poster: "B2 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bensonbd-at-erols-dot-com>

Hi All,
    Found an interesting article in the September/October edition of the
ARRL publication QEX, pages 26 to 32, The Art of Making and Measuring LF
Coils, by Paolo Antoniazzi, IW2ACD, and Marco Arecco, IK2WAQ.  

Coil 1:  

Core material:                     Grey PVC
Diameter:                            160 mm
Wire Size:                              0.90 mm (enameled magnet wire)
Turns:                                 175
Coil Length:                        176 mm
Wire Length:                         88 meters
Inductance:                             3.12 mH
DC Resistance:                        2.43 Ohms
XL Reactance at 136 kHz:  2665 Ohms
Q at 136 kHz:                      205
R-AC at 136 kHz:                  13.0 Ohms
XL Reactance at 200 kHz:  3919 Ohms
Q at 200 kHz:                      187
R-AC at 200 kHz:                  21.0 Ohms
----------------------------------------------------------------------
Coil 2:

Core Material:                     Air plus Wood (8 wooden dowels)
Diameter:                            330 mm
Wire Size:                              0.90 mm (enameled magnet wire)
Turns:                                  85
Coil Length:                         87 mm
Wire Length:                         88 meters
Inductance:                             3.30 mH
DC Resistance:                        2.43 Ohms
XL Reactance at 136 kHz:  2818 Ohms
Q at 136 kHz:                      237
R-AC at 136 kHz:                  11.9 Ohms
XL Reactance at 200 kHz:  4145 Ohms
Q at 200 kHz:                      230
R-AC at 200 kHz:                  18.0 Ohms
----------------------------------------------------------------------
Coil 3:

Core Material:                     Air plus Wood (8 wooden dowels)
Diameter:                            330 mm
Wire Size:                              0.90 mm (enameled magnet wire)
Turns:                                  85
Coil Length:                        165 mm
Wire Length:                         88 meters
Inductance:                             2.50 mH
DC Resistance:                        2.43 Ohms
XL Reactance at 136 kHz:  2135 Ohms
Q at 136 kHz:                      318
R-AC at 136 kHz:                   6.71 Ohms
XL Reactance at 200 kHz:  3140 Ohms
Q at 200 kHz:                      309
R-AC at 200 kHz:                  10.16 Ohms
----------------------------------------------------------------------

Cheers,

B2