I have a question thats been on my mind for a while.
I have been thinking of constructing a balanced atu to feed an hf doublet, of this configuration http://www.somis.org/bbat_f2.jpg
I do have two nice, identical roller coaster inductors I can use, but do not have a "balanced" butterfly capacitor.
However I have some vacuum caps of suitable value.
My question is, just how important is physical symetry for a capacitor in this sort of circuit, because surely, a vacuum cap is not of balanced, symetrical construction, as is a butterfly capacitor !
Then again, most magnetic hf loops use such caps, but maybe its because the feed system is NOT symetrical in this case.
Hints anyone ?
Thank you.
I have been thinking of constructing a balanced atu to feed an hf doublet, of this configuration http://www.somis.org/bbat_f2.jpg
I do have two nice, identical roller coaster inductors I can use, but do not have a "balanced" butterfly capacitor.
However I have some vacuum caps of suitable value.
My question is, just how important is physical symetry for a capacitor in this sort of circuit, because surely, a vacuum cap is not of balanced, symetrical construction, as is a butterfly capacitor !
Then again, most magnetic hf loops use such caps, but maybe its because the feed system is NOT symetrical in this case.
Hints anyone ?
Thank you.