|
1) everything Electronic M said
2) Yes, "knifing" means inserting a tool to spread the windings (only done on small air-wound coils)
3) audio IF oscillating sounds a bit strange to me (but someone with more experience here should comment). Are you doing this with a tuner signal, or injecting 4.5 MHz audio? If injecting 4.5 MHz, be very careful of your cable / wire lengths and grounding.
__________________
www.bretl.com
Old TV literature, New York World's Fair, and other miscellany
|