50 to 75 ohm transformer for receiving systems.

4 turns input 5 turns output

Used material: 1 core of 73 material Fair-Rite 2873000202

Input = 4 turns / Output = 5 turns

4 square = 16 / 5 square = 25

25 / 16 = 1.56

When Input impedance = 50 Ohms,

Output impedance wil be 1.56 x 50 Ohm = 78 Ohms

Optimization for 7 MHZ:

2 X 39 pF in parallel

Optimization for the entire frequency band with 39 pF:

Insertion loss:

Insertion loss for 2 devices:

@ 7 MHz loss of one device = 0,16 dB.