Ramsey Electronics QAMP20 User Manual
Page 11
QAMP20 • 11
through the core, continuing on in the same direction as before. Tin
each end with solder all the way up to the core body. This winding is
the 2 turn center-tapped secondary of T2.
45. Winding T1: Locate the remaining larger 2-hole ferrite core. Cut off a
10 inch length of the enameled magnet wire and thread the wire
through the core 3 times, pulling each turn gently tight. That's 3 times
through each hole resulting in 3 complete turns through the core.
Again, the amount of wire cut for this task is the proper amount. If you
have too little or too much, then you have not wound the core correctly.
Tin each end with solder as before. Tin all the way up to the core body.
46. Cut off another length of wire, 9½ inches long. Wind 1 turn
through the core, loop out 1 inch, twist together and run one more turn
through the core. Continue on in the same direction as before. Tin each
end with solder all the way up to the core body. This winding is the 2
turn center-tapped primary of T1.
47. Locate the smaller transformer (T2) and install it snugly on the PC
board.
48. Install the larger transformer (T1) into the indicated location on the PC
board.
49. Install L1, a 12 turn toroid inductor wound previously. If desired, a small
dab of hot melt glue, bathtub sealer, or caulk may be used to secure
the toroids.