|Inductors L9 and L10
Core: Amidon T-106-2 iron powder toroidal core
Wire: 0.5 mm enamelled copper wire
Sufficient total wire lenght is 3 meters for each coil. Thread the wire 67 times through the center of the toroidal core. Recheck carefully the amount of turns after winding. Pre-solder the wires as shown in the picture. After soldering the coils L9 and L10, secure the toroids with the plastic ties through the holes in the PCB.
|SWR transformer T6
Core: Amidon FT-37-77 ferrite toroidal core
Wire: Wrap wire AWG 30. Use different color for primary and secondary.
Primary turns: 40 (white in picture)
Secondary turns: 1 (black in picture)
Sufficient total wire lenght is 1 meters for primary winding and one inch for the secondary. First thread the primary wire 40 times through the center of the toroidal core. Wind in two layers, one on the other. The style is not critical but it is important to wind correct amount of windings. Next put the secondary wire through the center. Strip the wires as shown in the picture. See soldering details in the main board pictutes.