EGV-9B
80 to 10m QRP CW Transceiver Kit
Page 19
IMPORTANT:
Wind the toroid exactly as shown in the images. You must pay attention to number of
turns as well as to the direction of the winding.
L2
T
oroid transformer
L2 is an impedance matching transformer with a bifilar winding. An FT37-43 (black toroid with
9.5mm/0.375in outer diameter) is used. It has 8 + 8 turns.
- Cut a 30-31cm (12
”) long piece of 0.5mm diameter enameled wire.
- Bend the wire in half.
- Twist it so that there are two twists per cm.
16cm (32cm bent in half)
- Before beginning to wind, leave 15-20mm of wire, measured from the end of the wires to the outer
edge of the toroid. Now wind eight (8) turns on the toroid. Remember: Count one turn for each pass of
the wire through the center of the toroid.
-
Spread the turns evenly around the toroid.
Summary of Contents for EGV-9B v1
Page 10: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 10 252 QUADRANT COMPONENT LAYOUT MAP...
Page 14: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 14 100n capacitors location map...
Page 24: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 24...
Page 34: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 34 SCHEMATICS...
Page 35: ...EGV 9B 80 to 10m QRP CW Transceiver Kit Page 35...
