It's an interesting problem. We are using a flat wire wound coil in our BECs (where the coil is wound like a slinky), which give VERY high saturation currents, but only so-so RMS current values. Flat wound toroids are just now starting to hit the scene, which give even higher saturation currents, lower noise, and higher RMS currents. But they are tall -- which doesn't fit well into RC applications. But every year, we see higher and higher currents in smaller coils. I would have thought that coil technology would have peaked 20 years ago -- but they keep getting better densities.


--- And BTW, sorry to jack the thread for a technical discussion

Gotta remember people weren't really concerned about small size/light weight 20 years ago. These days, everyone wants their entire world to fit in their pocket, so naturally, that demand requires more advances.

And, techy thread jacking is the norm here. At least it is related to the discussion (if a tad remotely).

this actually sounds ideal, is there a easy way to do this?

Use a Y harness that routes power from BEC to servo, and the extra lead goes to RX and passes only signal wire.

so I would need to remove the signal wire from the cc bec (orange) and only have the orange wire on the other side of the y harness? Leaving all the wires from the esc intact and plugged in normally? Or just hook up the black and red wire from the bec to the black and red to the servo and just plug the signal directly back into the reciever? Does the signal wire from the CC bec have to be plugged to something?

Just remove the red and black (or just one) that go from servo to RX. No need to remove signal from the external BEC. No need to do anything else.

thanks!