Coil Theory

[Anonymous]

Eric.Sometime ago you promised another coil post.Would you mind reiterating on your rectangular coil theory?Can we demonstrate that a rectangular coil is superior in depth or S/N ratio to a round coil of the same area?Wishing you all well Jim S.

 

[Anonymous]

Yes, I'm also waiting for this post. Eric, could you please include some advice about screening?!
My problem is, if I use any metal foil, it would give a signal. The same with wound and soldered wire, as far as it would give small shorted loops round the main coil windings.
I find it great from you sharing your experiance and your time with us, much more as every answer multiplies the questions. Thank you!

 

[Anonymous]

one more question concerning DD-coils - can somebody give me a figure, at wich % area overlap they achieve balance?
Thanks!

 

[Anonymous]

About: concerning DD-coils - can somebody give me a figure, at wich % area overlap they achieve balance?
It is best to set the overlap experimentally, since it is very sensitive to coils mismatches.

 

[Anonymous]

I'm working on the rough construction now, so it would be good if I have to do less changes starting the experimental tuning (circuit is not ready).