captainkirksdog
Member
Hi,
I've gone brain-dead about some simple algebra. This is the formula for air-core coils:
N^2=L(3a+9b+10c)/0.2a^2
Where:
N=Number of turns
L=inductance in microhenries
a=wire diameter in inches + form diameter
b=length of winding in inches
c=wire diameter in inches
Now I can easily solve for N, but what if I know N and need to solve for L? In other words, I have several unmarked coils that I would like to know the inductance of. Since I don't have an accurate inductance meter, I was hoping to calculate their values. Can someone show me the way to do this? Thanks.
I've gone brain-dead about some simple algebra. This is the formula for air-core coils:
N^2=L(3a+9b+10c)/0.2a^2
Where:
N=Number of turns
L=inductance in microhenries
a=wire diameter in inches + form diameter
b=length of winding in inches
c=wire diameter in inches
Now I can easily solve for N, but what if I know N and need to solve for L? In other words, I have several unmarked coils that I would like to know the inductance of. Since I don't have an accurate inductance meter, I was hoping to calculate their values. Can someone show me the way to do this? Thanks.