For FB group Building Transistor Radios
I rigged up two of the transformers, connecting six 600 ohm windings in series and two 600 ohm windings in parallel. I measured the voltages to find the turns ratio. I applied 6 volts to the 6 series windings, and measured 1 volt on the two paralleled windings. This gives me a 6 to 1 turns ratio.
The impedance ratio is the square of the turns ratio, or 36. I assumed the two 600 ohm windings in parallel give 300 ohms. So that multiplied by 36 is 10400 ohms for the six series windings.
