EGV-9B_BPFLPF
module for EGV-9B CW Transceiver kit
Page 6
TOROIDS WINDING
T
he following table shows the type of toroid, the turns it has to wind and the length of wire it will
need. All toroids are 9.5mm/0.375in outside diameter. The T37-2 toroid is the red one and the T37-6 is
the yellow one. 0.4 mm thick enameled wire is used.
TOROIDS TABLE
TOROID BAND
TYPE
TURNS
WIRE lenght
(0.4mm Ø)
L7
80
T37-2
25
36 cm
L8
80
T37-2
27
39 cm
L9
80
T37-2
25
36 cm
L10
60-40 T37-2
18
28 cm
L11
60-40 T37-2
20
30 cm
L12
60-40 T37-2
18
28 cm
L13
30-20 T37-6
15
24 cm
L14
30-20 T37-6
16
25 cm
L15
30-20 T37-6
15
24 cm
L16
17-15 T37-6
12
20 cm
L17
17-15 T37-6
14
23 cm
L18
17-15 T37-6
12
20 cm
L19
12-10 T37-6
10
18 cm
L20
12-10 T37-6
11
19 cm
L21
12-10 T37-6
10
18 cm
Note: Lengths are calculated so that you will have some wire left over and easy to pull on.
