MFT-20 DSB Transceiver Kit
Page 20
L4 VXO Tuning Inductor
A T68-2 is used (red toroid with 12.mm/0.5in OD).
Cut about 95cm (35.5in) of
0.3mm enameled wire
(the thinnest), then forty five (45) turns.
Leave an extra 1.5-2cm pigtail of wire on each end.
L4 can be wound in two stages. Pass half of the wire through the toroid, wind half of the toroid, and then
turn the toroid and wind the other half. If you're not sure how many turns you have wound, you can count
them easily looking closely through a magnifying glass. The half-turns that only pass through the inside
of the toroid also count as a complete turn.
IMPORTANT
: DO NOT MOUNT toroid L4 yet. It will be installed later, in the last section for adjustment
and testing.
