MFT-20 DSB Transceiver Kit
Page 18
IMPORTANT: Wind the toroid exactly as shown in the pictures. You must pay attention to number of
turns as well as to the direction of the winding.
Toroidal transformer L9
L9 is an impedance matching transformer with a bifilar winding. An FT37-43 is used (black toroid with
9.5mm/0.375in OD). It has 8+8 turns.
- Cut a 31-32cm (12in) long piece of 0.5mm diameter enameled wire.
- Bend the wire in half.
- Twist it so that there are about two twists per cm.
16cm (32 cm bent in half)
