Rik Strobbe schrieb:
First of all my appologies to those getting bored with my loop inductance
formulas.
But after some 'playing' with simulation software and calcuations it turned
out that there might be a more accurate and simpler formula to calculate
the inductance of a big loop :
L = 0.8*B*(ln(A/d)+6.82)
where L = loop inductance in uH, A = loop height in m, B = loop length in m
and d = wire diamater in mm
At first sight there seems no (practical) limits to the A/B ratio.
If this formula is correct it would also mean that (for a given height) the
loop inductance increase linear with the loop length.
73 from a sunny Belgium (sunny and 22°C ... instead of the rain, wind and
10°C we usually have begin april)
Rik ON7YD
Hi Rik,
dimensions of my loop-ant: A = 12m, B = 65m, d = 4mm;
2 turns, space 80mm (2m above ground).
I tried ur formular inserting the wirepitch somehow as multipl,
as div, as log or ln. but the result was vy far away from
the measured one (720uH).
any idea ?
regards
Uwe/dj8wx
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