When winding with served Litz wire, you will notice that it lays straight down easily and helps make nice coils. Sound wire (one or multistrand) may also lay out easily if you supply it across a obstruct of beeswax to give it “adhere”. You will notice that the Litz wire comes with increased “Q” but it’s “bulkier” in comparison to the equal strong wire (will require up extra space). Litz wire will have a tendency to kink mainly because it will come from the spool due to the wire perspective.

To appraise the capacitance involving conductors of bifilar or Litz wire, calculate just a foot or so of wire and extrapolate to the total span (via resistance specifications). If you measure the capacitance around the spool, you will see a very small (in problem) reading. You are trying to measure capacitance across two really good RF chokes with a tester which uses an RF frequency to determine capacitance. That’s the reason.

Litz wire coil master packing machine may also be a bit confusing. For instance: 6/44 unserved Litz wire indicates 6 strands of #44 AWG wire without an general cover (unserved). The AWG “equivalent circular mills” for 6/44 Litz is #36 AWG. Consequently 6/44 Litz offers the very same rounded DC and mills present coping with ability as you #36 AWG wire. However, the RF current resistance of 6/44 Litz is less than half that of the #36 AWG wire and approaches that of #28 AWG wire. What all of this means for the coil is that 6/44 Litz will have a greater “Q” compared to the counterpart strong wire of identical DC recent capacity (#36 AWG), but it may need up more space. Unserved 6/44 occupies the room of #34 AWG and provided 6/44 uses up the area of #32 AWG coil master packingmachine.

From what I’ve seen, suppliers of modest IF transformers inside the 100Khz to 455Khz variety use single #38 AWG wire (good), bifilar #40-42 AWG wire (greater) or trifilar #44 AWG wire (finest) for your windings (enables 18-28ma DC). Smaller JW Miller 100Khz IFs furthermore have a ruberized “powdered iron? ” coating inside of the aluminium can. I believe the causes with this covering would be to further more improve permeability as well as to isolate the coil through the can. The reality that 100Khz IFs need 5-6mH of inductance determines a personally big coil, the larger coil contributes to greater capacitive coupling for the can, which decreases “Q” and overall inductance. The larger permeability and resultant better “AL” value (uH/100turns) is required to keep the general coil master size controllable from the more compact 3/4″ sq IF shields.