Here is lesson 22 and some math for hams. This lesson mostly covers how to calculate total resistance, capacitance, and inductance in a circuit. The formulas you need to know are below. You may want a calculator for this lesson.

First, a definition you will need to memorize:

Magnetizing current is the current in the primary winding when no load is attached to the secondary winding.

The formulas:

To calculate total resistance for resistors in parallel:

Total R = 1/[1/R1 + 1/R2 + 1/R3 + 1/Rn...]

To calculate total resistance for resistors in series:

Total R = R1 + R2 + R3 + Rn...

To calculate total inductance for inductors in parallel:

Total Inductance = 1/[1/I1+ 1/I2 + 1/I3 +1/In...]

To calculate total inductance in for inductors in series:

Total Inductance = I1 + I2 + I3 +In...

Total inductance and resistance in a circuit are calculated in the same manner for components in series and in parallel. Total capacitance is calculate in the opposite manner.

To calculate total capacitance for capacitors in parallel:

Total Capacitance = C1 + C2 + C3 + Cn...

To calculate total capacitance for capacitors in series:

Total Capacitance = 1/[1/C1 + 1/C2 + 1/C3 + 1/Cn...]

To find the voltage across the secondary winding in a transformer divide the volts AC connected to the primary winding by the ratio of primary turns to secondary turns.

VAC/(Primary turns/Secondary turns)

The turns ratio for of a transformer is the square root of the impedance ratio. If you know the impedance you need to match:

(Square Root of Impedance 1/Impedance 2) : 1

Good luck. As you will probably notice, I'm not a math teacher! If you have any suggestions, questions, or comments, please feel free to leave them in the comments box.

73,

Andy

KE4GKP

This is a great article, I really like it. One of the best blog ever i seen, Thanks for sharing this.

ReplyDeleteHeya i am for the first time here. I came across this board and I find It truly useful & it helped me out a lot. I hope to give something back and aid others like you helped me. Visit here childrens party ideas for best Party Ideas for children.

ReplyDeleteSydney swimmers are the providing the best coaches in Sydney and if you are looking for free classes then call us now at 0431 571 161

ReplyDelete