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How to calculate the number of primary winding turns?

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froten

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Hello all,

when designing a class A&AB RF amplifiers (for example for the range from 3Mhz to 30Mhz) using a transformer to match the laod to the transistor output impedence, the ratio of the turns can be easly calculated, but:

Q1) how the actual number of the windings is calculated?
Q2) in case the primary of the transformer is tuned , is the number of turns remains the same for the highest Q value of the tuned circuit?
Q3) what is the prefered transformer to use? is it the balun, transmition line transformer, classic transformer...?

thanx for any help
 

Re: transformer design

How to calculate the number of primary winding turns:

Assuming you have a core selected, your volts per turn on the primary determines your flux density. To use the iron efficiently, usually want to excite the core close to but not past saturation.
 

Re: transformer design

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